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class="vector-toc-list"> <li id="toc-Density" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Density"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Density</span> </div> </a> <ul id="toc-Density-sublist" class="vector-toc-list"> <li id="toc-Pressure" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Pressure"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1.1</span> <span>Pressure</span> </div> </a> <ul id="toc-Pressure-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Buoyancy" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Buoyancy"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1.2</span> <span>Buoyancy</span> </div> </a> <ul id="toc-Buoyancy-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Penetration_of_light" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Penetration_of_light"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Penetration of light</span> </div> </a> <ul id="toc-Penetration_of_light-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Temperature" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Temperature"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3</span> <span>Temperature</span> </div> </a> <ul id="toc-Temperature-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Thermal_conductivity" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Thermal_conductivity"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.4</span> <span>Thermal conductivity</span> </div> </a> <ul id="toc-Thermal_conductivity-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Acoustic_properties" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Acoustic_properties"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.5</span> <span>Acoustic properties</span> </div> </a> <ul id="toc-Acoustic_properties-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Ecosystems" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Ecosystems"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Ecosystems</span> </div> </a> <ul id="toc-Ecosystems-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Humans" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Humans"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Humans</span> </div> </a> <button aria-controls="toc-Humans-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Humans subsection</span> 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id="toc-Atmospheric_pressure_diving-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Submersibles_and_submarines" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Submersibles_and_submarines"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.4</span> <span>Submersibles and submarines</span> </div> </a> <ul id="toc-Submersibles_and_submarines-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Remotely_operated_or_autonomous_vehicles" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Remotely_operated_or_autonomous_vehicles"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.5</span> <span>Remotely operated or autonomous vehicles</span> </div> </a> <ul id="toc-Remotely_operated_or_autonomous_vehicles-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Sciences" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Sciences"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Sciences</span> </div> </a> <ul id="toc-Sciences-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Footnotes" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Footnotes"> 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mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Aquatic or submarine environment</div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">"Underwater" redirects here. For other uses, see <a href="/wiki/Underwater_(disambiguation)" class="mw-disambig" title="Underwater (disambiguation)">Underwater (disambiguation)</a>.</div> <figure typeof="mw:File/Thumb"><a href="/wiki/File:Great_Barrier_Reef_snorkeling_18.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Great_Barrier_Reef_snorkeling_18.jpg/250px-Great_Barrier_Reef_snorkeling_18.jpg" decoding="async" width="250" height="188" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Great_Barrier_Reef_snorkeling_18.jpg/375px-Great_Barrier_Reef_snorkeling_18.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Great_Barrier_Reef_snorkeling_18.jpg/500px-Great_Barrier_Reef_snorkeling_18.jpg 2x" data-file-width="4000" data-file-height="3000" /></a><figcaption><a href="/wiki/Great_Barrier_Reef" title="Great Barrier Reef">Great Barrier Reef</a>, Australia</figcaption></figure> <p>An <b>underwater environment</b> is a environment of, and immersed in, liquid <a href="/wiki/Water" title="Water">water</a> in a natural or artificial feature (called a <a href="/wiki/Water" title="Water">body of water</a>), such as an <a href="/wiki/Ocean" title="Ocean">ocean</a>, <a href="/wiki/Sea" title="Sea">sea</a>, <a href="/wiki/Lake" title="Lake">lake</a>, <a href="/wiki/Pond" title="Pond">pond</a>, <a href="/wiki/Reservoir" title="Reservoir">reservoir</a>, <a href="/wiki/River" title="River">river</a>, <a href="/wiki/Canal" title="Canal">canal</a>, or <a href="/wiki/Aquifer" title="Aquifer">aquifer</a>. Some characteristics of the underwater environment are universal, but many depend on the local situation. </p><p>Liquid water has been present on Earth for most of the <a href="/wiki/History_of_Earth" title="History of Earth">history of the planet</a>. The underwater environment is thought to be the place of the <a href="/wiki/Origin_of_life" class="mw-redirect" title="Origin of life">origin of life</a> on Earth, and it remains the ecological region most critical to the support of life and the <a href="/wiki/Natural_habitat" class="mw-redirect" title="Natural habitat">natural habitat</a> of the majority of living organisms. Several branches of science are dedicated to the study of this environment or specific parts or aspects of it. </p><p>A number of human activities are conducted in the more accessible parts of the underwater environment. These include research, underwater diving for work or recreation, and underwater warfare with submarines. It is hostile to humans in many ways and often inaccessible, and therefore relatively little explored. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Extent">Extent</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=1" title="Edit section: Extent"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:BlueMarble-2001-2002.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1c/BlueMarble-2001-2002.jpg/220px-BlueMarble-2001-2002.jpg" decoding="async" width="220" height="110" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1c/BlueMarble-2001-2002.jpg/330px-BlueMarble-2001-2002.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1c/BlueMarble-2001-2002.jpg/440px-BlueMarble-2001-2002.jpg 2x" data-file-width="4096" data-file-height="2048" /></a><figcaption>The world ocean is the most visible part of Earth from space.</figcaption></figure> <p>Three quarters of the planet <a href="/wiki/Earth" title="Earth">Earth</a> are covered by water. Most of the planet's solid surface is <a href="/wiki/Abyssal_plain" title="Abyssal plain">abyssal plain</a>, at depths between 4,000 and 5,500 metres (13,100 and 18,000 ft) below the surface of the oceans. The solid surface location on the planet closest to the center of the geoid is the <a href="/wiki/Challenger_Deep" title="Challenger Deep">Challenger Deep</a>, located in the <a href="/wiki/Mariana_Trench" title="Mariana Trench">Mariana Trench</a> at a depth of 10,924 metres (35,840 ft). There is a smaller part of the surface covered by bodies of fresh water and a large volume of underground water in aquifers. The underwater environment is hostile to humans in many ways and therefore little explored. It can be mapped by <a href="/wiki/Sonar" title="Sonar">sonar</a>, or more directly explored via manned, remotely operated, or autonomous <a href="/wiki/Submersibles" class="mw-redirect" title="Submersibles">submersibles</a>. The ocean floors have been surveyed via sonar to at least a coarse resolution; particularly-strategic areas have been mapped in detail, to assist in navigating and detecting submarines, though the resulting maps may be classified.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (June 2016)">citation needed</span></a></i>]</sup> </p> <div class="mw-heading mw-heading3"><h3 id="Oceans_and_seas">Oceans and seas</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=2" title="Edit section: Oceans and seas"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main articles: <a href="/wiki/Ocean" title="Ocean">Ocean</a> and <a href="/wiki/Sea" title="Sea">Sea</a></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Clouds_over_the_Atlantic_Ocean.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Clouds_over_the_Atlantic_Ocean.jpg/220px-Clouds_over_the_Atlantic_Ocean.jpg" decoding="async" width="220" height="147" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Clouds_over_the_Atlantic_Ocean.jpg/330px-Clouds_over_the_Atlantic_Ocean.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Clouds_over_the_Atlantic_Ocean.jpg/440px-Clouds_over_the_Atlantic_Ocean.jpg 2x" data-file-width="3755" data-file-height="2513" /></a><figcaption>Clouds over the Atlantic Ocean</figcaption></figure> <p>An ocean is a body of <a href="/wiki/Water" title="Water">water</a> that composes much of a <a href="/wiki/Planet" title="Planet">planet</a>'s <a href="/wiki/Hydrosphere" title="Hydrosphere">hydrosphere</a>.<sup id="cite_ref-pri.ocean_1-0" class="reference"><a href="#cite_note-pri.ocean-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> On <a href="/wiki/Earth" title="Earth">Earth</a>, an ocean is one of the major conventional divisions of the <a href="/wiki/World_Ocean" class="mw-redirect" title="World Ocean">World Ocean</a>. These are, in descending order by area, the <a href="/wiki/Pacific_Ocean" title="Pacific Ocean">Pacific</a>, <a href="/wiki/Atlantic_Ocean" title="Atlantic Ocean">Atlantic</a>, <a href="/wiki/Indian_Ocean" title="Indian Ocean">Indian</a>, <a href="/wiki/Southern_Ocean" title="Southern Ocean">Southern</a> (Antarctic), and <a href="/wiki/Arctic_Ocean" title="Arctic Ocean">Arctic</a> Oceans.<sup id="cite_ref-oed.130201_2-0" class="reference"><a href="#cite_note-oed.130201-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-mw.ocean_3-0" class="reference"><a href="#cite_note-mw.ocean-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> The word "ocean" is often used interchangeably with "sea" in <a href="/wiki/American_English" title="American English">American English</a>. Strictly speaking, a <i><a href="/wiki/Sea" title="Sea">sea</a></i> is a body of water (generally a division of the world ocean) partly or fully enclosed by land,<sup id="cite_ref-pri.sea_4-0" class="reference"><a href="#cite_note-pri.sea-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> though "<b>the sea</b>" refers also to the oceans. </p><p><a href="/wiki/Saline_water" title="Saline water">Saline water</a> covers approximately 361,000,000 km<sup>2</sup> (139,000,000 sq mi) and is customarily divided into several principal oceans and smaller seas, with the ocean covering approximately 71% of Earth's surface and 90% of the Earth's <a href="/wiki/Biosphere" title="Biosphere">biosphere</a>.<sup id="cite_ref-noaa.gov_5-0" class="reference"><a href="#cite_note-noaa.gov-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> The ocean contains 97% of Earth's water, and <a href="/wiki/Oceanography" title="Oceanography">oceanographers</a> have stated that less than 100% of the World Ocean has been explored.<sup id="cite_ref-noaa.gov_5-1" class="reference"><a href="#cite_note-noaa.gov-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> The total volume is approximately 1.35 billion cubic kilometers (320 million cu mi) with an average depth of nearly 3,700 meters (12,100 ft).<sup id="cite_ref-hypertextbook2003_6-0" class="reference"><a href="#cite_note-hypertextbook2003-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Charette_Smith_Ocean-depth_7-0" class="reference"><a href="#cite_note-Charette_Smith_Ocean-depth-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-NOAA_8-0" class="reference"><a href="#cite_note-NOAA-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Lakes,_ponds,_and_rivers"><span id="Lakes.2C_ponds.2C_and_rivers"></span>Lakes, ponds, and rivers</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=3" title="Edit section: Lakes, ponds, and rivers"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main articles: <a href="/wiki/Lake" title="Lake">Lake</a>, <a href="/wiki/Pond" title="Pond">Pond</a>, and <a href="/wiki/River" title="River">River</a></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:%D0%A0%D0%B5%D0%BA%D0%B0_%D0%A1%D0%B0%D0%BC%D1%83%D1%80.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/43/%D0%A0%D0%B5%D0%BA%D0%B0_%D0%A1%D0%B0%D0%BC%D1%83%D1%80.jpg/220px-%D0%A0%D0%B5%D0%BA%D0%B0_%D0%A1%D0%B0%D0%BC%D1%83%D1%80.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/43/%D0%A0%D0%B5%D0%BA%D0%B0_%D0%A1%D0%B0%D0%BC%D1%83%D1%80.jpg/330px-%D0%A0%D0%B5%D0%BA%D0%B0_%D0%A1%D0%B0%D0%BC%D1%83%D1%80.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/43/%D0%A0%D0%B5%D0%BA%D0%B0_%D0%A1%D0%B0%D0%BC%D1%83%D1%80.jpg/440px-%D0%A0%D0%B5%D0%BA%D0%B0_%D0%A1%D0%B0%D0%BC%D1%83%D1%80.jpg 2x" data-file-width="3072" data-file-height="2304" /></a><figcaption><a href="/wiki/Samur_River" class="mw-redirect" title="Samur River">Samur River</a> in <a href="/wiki/Azerbaijan" title="Azerbaijan">Azerbaijan</a> – In the natural landscape</figcaption></figure> <p>A lake is an area filled with water, localized in a <a href="/wiki/Depression_(geology)" title="Depression (geology)">basin</a>, that is surrounded by land, apart from any <a href="/wiki/River" title="River">river</a> or other outlet that serves to feed or drain the lake.<sup id="cite_ref-Purcell_9-0" class="reference"><a href="#cite_note-Purcell-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> Lakes lie on <a href="/wiki/Land" title="Land">land</a> and are not part of the <a href="/wiki/World_Ocean" class="mw-redirect" title="World Ocean">ocean</a>, and therefore are distinct from <a href="/wiki/Lagoon" title="Lagoon">lagoons</a>, and are also larger and deeper than <a href="/wiki/Pond" title="Pond">ponds</a>, though there are no official or scientific definitions.<sup id="cite_ref-Dictionary_10-0" class="reference"><a href="#cite_note-Dictionary-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> Lakes can be contrasted with <a href="/wiki/River" title="River">rivers</a> or <a href="/wiki/Stream" title="Stream">streams</a>, which are usually flowing. Most lakes are fed and drained by rivers and streams. Natural lakes are generally found in mountainous areas, <a href="/wiki/Rift_zone" title="Rift zone">rift zones</a>, and areas with ongoing <a href="/wiki/Glacier" title="Glacier">glaciation</a>. Other lakes are found in <a href="/wiki/Endorheic_basin" title="Endorheic basin">endorheic basins</a> or along the courses of mature rivers. In some parts of the world, there are many lakes because of chaotic drainage patterns left over from the <a href="/wiki/Last_Glacial_Period" title="Last Glacial Period">last ice age</a>. All lakes are temporary over geologic time scales, as they will slowly fill in with sediments or spill out of the basin containing them. Many lakes are <a href="/wiki/Controlled_lake" title="Controlled lake">artificial</a> and are constructed for industrial or agricultural use, for <a href="/wiki/Hydro-electric_power" class="mw-redirect" title="Hydro-electric power">hydro-electric power</a> generation or domestic water supply, or for aesthetic, recreational purposes, or other activities. </p><p>A pond is an area filled with water, either natural or artificial, that is smaller than a <a href="/wiki/Lake" title="Lake">lake</a>.<sup id="cite_ref-Webster_11-0" class="reference"><a href="#cite_note-Webster-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> It may arise naturally in floodplains as part of a river system, or be a somewhat isolated depression (such as a <a href="/wiki/Kettle_(landform)" title="Kettle (landform)">kettle</a>, <a href="/wiki/Vernal_pool" title="Vernal pool">vernal pool</a>, or <a href="/wiki/Prairie_pothole" class="mw-redirect" title="Prairie pothole">prairie pothole</a>). It may contain shallow water with marsh and aquatic plants and animals.<sup id="cite_ref-Clegg_1986_12-0" class="reference"><a href="#cite_note-Clegg_1986-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> Ponds are frequently man-made or expanded beyond their original depth and bounds. Among their many uses, ponds provide water for agriculture and livestock, aid in habitat restoration, serve as fish hatcheries, are components of landscape architecture, may store thermal energy as <a href="/wiki/Solar_pond" title="Solar pond">solar ponds</a>, and treat <a href="/wiki/Wastewater" title="Wastewater">wastewater</a> as <a href="/wiki/Treatment_pond" title="Treatment pond">treatment ponds</a>. Ponds may be fresh, <a href="/wiki/Saltwater" class="mw-redirect" title="Saltwater">saltwater</a>, or <a href="/wiki/Brackish" class="mw-redirect" title="Brackish">brackish</a>. </p><p>A river is a natural flowing <a href="/wiki/Watercourse" class="mw-redirect" title="Watercourse">watercourse</a>, usually <a href="/wiki/Freshwater" class="mw-redirect" title="Freshwater">freshwater</a>, flowing under the influence of gravity on <a href="/wiki/Ocean" title="Ocean">ocean</a>, <a href="/wiki/Lake" title="Lake">lake</a>, another river, or into the ground. Small rivers can be referred to using names such as <a href="/wiki/Stream" title="Stream">stream</a>, creek, brook, rivulet, and <a href="/wiki/Rill" title="Rill">rill</a>. There are no official definitions for the generic term river as applied to <a href="/wiki/Geographical_feature" title="Geographical feature">geographic features</a>,<sup id="cite_ref-Geonames_13-0" class="reference"><a href="#cite_note-Geonames-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> Rivers are part of the <a href="/wiki/Hydrological_cycle" class="mw-redirect" title="Hydrological cycle">hydrological cycle</a>; water generally collects in a river from <a href="/wiki/Precipitation_(meteorology)" class="mw-redirect" title="Precipitation (meteorology)">precipitation</a> in a <a href="/wiki/Drainage_basin" title="Drainage basin">drainage basin</a> from <a href="/wiki/Surface_runoff" title="Surface runoff">surface runoff</a> and other sources such as <a href="/wiki/Groundwater_recharge" title="Groundwater recharge">groundwater recharge</a>, <a href="/wiki/Spring_(hydrosphere)" class="mw-redirect" title="Spring (hydrosphere)">springs</a>, and the release of stored water in natural ice and snow. Potamology is the scientific study of rivers, while <a href="/wiki/Limnology" title="Limnology">limnology</a> is the study of inland waters in general. </p> <div class="mw-heading mw-heading3"><h3 id="Subterranean_water">Subterranean water</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=4" title="Edit section: Subterranean water"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Aquifer" title="Aquifer">Aquifer</a></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Aquifer_en.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/04/Aquifer_en.svg/220px-Aquifer_en.svg.png" decoding="async" width="220" height="218" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/04/Aquifer_en.svg/330px-Aquifer_en.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/04/Aquifer_en.svg/440px-Aquifer_en.svg.png 2x" data-file-width="672" data-file-height="665" /></a><figcaption>Typical aquifer cross-section</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:JB_CAVE.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/bb/JB_CAVE.png/220px-JB_CAVE.png" decoding="async" width="220" height="124" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/bb/JB_CAVE.png/330px-JB_CAVE.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/bb/JB_CAVE.png/440px-JB_CAVE.png 2x" data-file-width="2560" data-file-height="1440" /></a><figcaption>Diving in a flooded cave</figcaption></figure> <p>An <b>aquifer</b> is an underground layer of <a href="/wiki/Water" title="Water">water</a>-bearing <a href="/wiki/Permeability_(earth_sciences)" class="mw-redirect" title="Permeability (earth sciences)">permeable rock</a>, rock fractures or unconsolidated materials (<a href="/wiki/Gravel" title="Gravel">gravel</a>, <a href="/wiki/Sand" title="Sand">sand</a>, or <a href="/wiki/Silt" title="Silt">silt</a>). The study of water flow in aquifers and the characterization of aquifers is called <a href="/wiki/Hydrogeology" title="Hydrogeology">hydrogeology</a>. If an impermeable layer overlies the aquifer, pressure could cause it to become a confined aquifer. </p><p>Aquifers may be classified as porous or <a href="/wiki/Karst" title="Karst">karst</a>, where a porous aquifer contains the water in the spaces between the grains of a loose sediment or rock (typically <a href="/wiki/Sand" title="Sand">sand</a> or <a href="/wiki/Sandstone" title="Sandstone">sandstone</a>), while a karst aquifer contains water mainly in relatively large voids in relatively impermeable rock, such as <a href="/wiki/Limestone" title="Limestone">limestone</a> or <a href="/wiki/Dolomite_(rock)" title="Dolomite (rock)">dolomite</a>.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </p><p>Water filled <a href="/wiki/Caves" class="mw-redirect" title="Caves">caves</a> can be classified as active and relict: active caves have water flowing through them; relict caves do not, though water may be retained in them. Types of active caves include inflow caves ("into which a stream sinks"), outflow caves ("from which a stream emerges"), and through caves ("traversed by a stream").<sup id="cite_ref-Silvestru_2008_15-0" class="reference"><a href="#cite_note-Silvestru_2008-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Artificial_bodies_of_water">Artificial bodies of water</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=5" title="Edit section: Artificial bodies of water"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main articles: <a href="/wiki/Dam" title="Dam">Dam</a>, <a href="/wiki/Reservoir" title="Reservoir">Reservoir</a>, and <a href="/wiki/Canal" title="Canal">Canal</a></div> <p>A reservoir is, most commonly, an enlarged natural or artificial lake, pond or impoundment created using a <a href="/wiki/Dam" title="Dam">dam</a> or <a href="/wiki/Lock_(water_transport)" class="mw-redirect" title="Lock (water transport)">lock</a> to store water. Reservoirs can be created in a number of ways, including controlling a watercourse that drains an existing body of water, interrupting a watercourse to form an embayment within it, through excavation, or building <a href="/wiki/Retaining_wall" title="Retaining wall">retaining walls</a> or <a href="/wiki/Levee" title="Levee">levees</a>. Canals are artificial waterways which may have dams and locks that create reservoirs of low speed current flow. </p> <div class="mw-heading mw-heading2"><h2 id="Physical_characteristics">Physical characteristics</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=6" title="Edit section: Physical characteristics"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main articles: <a href="/wiki/Water" title="Water">Water</a> and <a href="/wiki/Properties_of_water" title="Properties of water">Properties of water</a></div> <p>Water is a <a href="/wiki/Transparency_and_translucency" title="Transparency and translucency">transparent</a>, <a href="/wiki/Taste" title="Taste">tasteless</a>, <a href="/wiki/Odorless" class="mw-redirect" title="Odorless">odorless</a>, and <a href="/wiki/Color_of_water" title="Color of water">nearly colorless</a> <a href="/wiki/Chemical_substance" title="Chemical substance">chemical substance</a>. Its <a href="/wiki/Chemical_formula" title="Chemical formula">chemical formula</a> is H<sub>2</sub>O, meaning that each of its <a href="/wiki/Molecule" title="Molecule">molecules</a> contains one <a href="/wiki/Oxygen" title="Oxygen">oxygen</a> and two <a href="/wiki/Hydrogen" title="Hydrogen">hydrogen</a> <a href="/wiki/Atom" title="Atom">atoms</a>, connected by <a href="/wiki/Covalent_bond" title="Covalent bond">covalent bonds</a>. Water is the name of the liquid state of H<sub>2</sub>O at <a href="/wiki/Standard_ambient_temperature_and_pressure" class="mw-redirect" title="Standard ambient temperature and pressure">standard ambient temperature and pressure</a>. Water at the surface of the Earth moves continually through the <a href="/wiki/Water_cycle" title="Water cycle">water cycle</a> of <a href="/wiki/Evaporation" title="Evaporation">evaporation</a>, <a href="/wiki/Transpiration" title="Transpiration">transpiration</a> (<a href="/wiki/Evapotranspiration" title="Evapotranspiration">evapotranspiration</a>), <a href="/wiki/Condensation" title="Condensation">condensation</a>, <a href="/wiki/Precipitation_(meteorology)" class="mw-redirect" title="Precipitation (meteorology)">precipitation</a>, and <a href="/wiki/Surface_runoff" title="Surface runoff">runoff</a>, usually reaching the sea. Water seldom exists in a pure form, it almost always contains dissolved substances, and usually other matter in suspension. </p> <div class="mw-heading mw-heading3"><h3 id="Density">Density</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=7" title="Edit section: Density"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Properties_of_water#Water,_ice_and_vapor" title="Properties of water">Properties of water § Water, ice and vapor</a></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Density_of_ice_and_water_(en).svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/Density_of_ice_and_water_%28en%29.svg/220px-Density_of_ice_and_water_%28en%29.svg.png" decoding="async" width="220" height="146" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/Density_of_ice_and_water_%28en%29.svg/330px-Density_of_ice_and_water_%28en%29.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8a/Density_of_ice_and_water_%28en%29.svg/440px-Density_of_ice_and_water_%28en%29.svg.png 2x" data-file-width="573" data-file-height="379" /></a><figcaption>Density of ice and water as a function of temperature</figcaption></figure> <p>The <a href="/wiki/Density" title="Density">density</a> of water is about 1 gram per cubic centimetre (62 lb/cu ft) The density varies with temperature, but not linearly: as the temperature increases, the density rises to a peak at 3.98 °C (39.16 °F) and then decreases; this is unusual.<sup id="cite_ref-Greenwood_and_Earnshaw_1997_16-0" class="reference"><a href="#cite_note-Greenwood_and_Earnshaw_1997-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> Regular, <a href="/wiki/Ice_Ih" class="mw-redirect" title="Ice Ih">hexagonal ice</a> is also less dense than liquid water—upon freezing, the density of water decreases by about 9%.<sup id="cite_ref-Perlman_17-0" class="reference"><a href="#cite_note-Perlman-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> These effects are due to the reduction of thermal motion with cooling, which allows water molecules to form more hydrogen bonds that prevent the molecules from coming close to each other.<sup id="cite_ref-Greenwood_and_Earnshaw_1997_16-1" class="reference"><a href="#cite_note-Greenwood_and_Earnshaw_1997-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> While below 4 °C the breakage of hydrogen bonds due to heating allows water molecules to pack closer despite the increase in the thermal motion (which tends to expand a liquid), above 4 °C water expands as the temperature increases.<sup id="cite_ref-Greenwood_and_Earnshaw_1997_16-2" class="reference"><a href="#cite_note-Greenwood_and_Earnshaw_1997-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> Water near the boiling point is about 4% less dense than water at 4 °C (39 °F).<sup id="cite_ref-Perlman_17-1" class="reference"><a href="#cite_note-Perlman-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>a<span class="cite-bracket">]</span></a></sup> </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Anomalous_expansion_of_water_Summer_Winter.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/32/Anomalous_expansion_of_water_Summer_Winter.svg/220px-Anomalous_expansion_of_water_Summer_Winter.svg.png" decoding="async" width="220" height="97" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/32/Anomalous_expansion_of_water_Summer_Winter.svg/330px-Anomalous_expansion_of_water_Summer_Winter.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/32/Anomalous_expansion_of_water_Summer_Winter.svg/440px-Anomalous_expansion_of_water_Summer_Winter.svg.png 2x" data-file-width="410" data-file-height="180" /></a><figcaption>Temperature distribution in a lake in summer and winter</figcaption></figure> <p>The unusual density curve and lower density of ice than of water is vital to life—if water were most dense at the freezing point, then in winter the very cold water at the surface of lakes and other water bodies would sink, the lake could freeze from the bottom up, and all life in them would be killed.<sup id="cite_ref-Perlman_17-2" class="reference"><a href="#cite_note-Perlman-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> Furthermore, given that water is a good thermal insulator (due to its heat capacity), some frozen lakes might not completely thaw in summer.<sup id="cite_ref-Perlman_17-3" class="reference"><a href="#cite_note-Perlman-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> The layer of ice that floats on top insulates the water below.<sup id="cite_ref-Zumdahl_and_Zumdahl_2013_19-0" class="reference"><a href="#cite_note-Zumdahl_and_Zumdahl_2013-19"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> Water at about 4 °C (39 °F) also sinks to the bottom, thus keeping the temperature of the water at the bottom constant (see diagram).<sup id="cite_ref-Perlman_17-4" class="reference"><a href="#cite_note-Perlman-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> </p><p>The density of sea water depends on the dissolved salt content as well as the temperature. Ice still floats in the oceans, otherwise they would freeze from the bottom up. The salt content lowers the freezing point by about 1.9 °C and lowers the temperature of the density maximum of water to the fresh water freezing point at 0 °C.<sup id="cite_ref-NOAA_2_20-0" class="reference"><a href="#cite_note-NOAA_2-20"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> This is why, in ocean water, the downward convection of colder water is <i>not</i> blocked by an expansion of water as it becomes colder near the freezing point. The oceans' cold water near the freezing point continues to sink. So creatures that live at the bottom of cold oceans like the <a href="/wiki/Arctic_Ocean" title="Arctic Ocean">Arctic Ocean</a> generally live in water 4 °C colder than at the bottom of frozen-over <a href="/wiki/Fresh_water" title="Fresh water">fresh water</a> lakes and rivers. </p><p>As the <a href="/wiki/Surface_science" title="Surface science">surface</a> of sea water begins to freeze (at −1.9 °C for salinity 3.5%) the ice that forms is essentially salt-free, with about the same density as freshwater ice.<sup id="cite_ref-NOAA_2_20-1" class="reference"><a href="#cite_note-NOAA_2-20"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> This ice floats on the surface, and the salt that is "frozen out" adds to the <a href="/wiki/Salinity" title="Salinity">salinity</a> and density of the sea water just below it, in a process known as <i><a href="/wiki/Brine_rejection" title="Brine rejection">brine rejection</a></i>. This denser salt water sinks by convection. This produces essentially freshwater ice at −1.9 °C on the surface.<sup id="cite_ref-NOAA_2_20-2" class="reference"><a href="#cite_note-NOAA_2-20"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> On a large scale, the process of brine rejection and sinking cold salty water results in ocean currents forming to transport such water away from the Poles, leading to a global system of currents called the <a href="/wiki/Thermohaline_circulation" title="Thermohaline circulation">thermohaline circulation</a>. </p> <div class="mw-heading mw-heading4"><h4 id="Pressure">Pressure</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=8" title="Edit section: Pressure"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Hydrostatic_pressure" class="mw-redirect" title="Hydrostatic pressure">Hydrostatic pressure</a></div> <p>The <a href="/wiki/Density" title="Density">density</a> of water causes ambient pressures that increase dramatically with depth. The <a href="/wiki/Atmospheric_pressure" title="Atmospheric pressure">atmospheric pressure</a> at the surface is 14.7 pounds per square inch or around 100 kPa. A comparable hydrostatic pressure occurs at a depth of only 10 metres (33 ft) (9.8 metres (32 ft) for sea water). Thus, at about 10 m below the surface, the water exerts twice the pressure (2 atmospheres or 200 kPa) as air at surface level. </p> <div class="mw-heading mw-heading4"><h4 id="Buoyancy">Buoyancy</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=9" title="Edit section: Buoyancy"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Buoyancy" title="Buoyancy">Buoyancy</a></div> <p>Any object immersed in water is subjected to a <a href="/wiki/Buoyancy" title="Buoyancy">buoyant</a> force that counters the force of <a href="/wiki/Gravity" title="Gravity">gravity</a>, appearing to make the object less heavy. If the overall density of the object exceeds the density of water, the object sinks. If the overall density is less than the density of water, the object rises until it floats on the surface. </p> <div class="mw-heading mw-heading3"><h3 id="Penetration_of_light">Penetration of light</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=10" title="Edit section: Penetration of light"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Nur05018-Pillow_lavas_off_Hawaii.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/da/Nur05018-Pillow_lavas_off_Hawaii.jpg/300px-Nur05018-Pillow_lavas_off_Hawaii.jpg" decoding="async" width="300" height="181" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/da/Nur05018-Pillow_lavas_off_Hawaii.jpg/450px-Nur05018-Pillow_lavas_off_Hawaii.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/da/Nur05018-Pillow_lavas_off_Hawaii.jpg/600px-Nur05018-Pillow_lavas_off_Hawaii.jpg 2x" data-file-width="1852" data-file-height="1118" /></a><figcaption>Note the bluish cast given to objects in this underwater photo of <a href="/wiki/Pillow_lava" title="Pillow lava">pillow lava</a> (<a href="/wiki/NOAA" class="mw-redirect" title="NOAA">NOAA</a>).</figcaption></figure> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Underwater_vision#Visibility" title="Underwater vision">Underwater vision § Visibility</a></div> <p>With increasing depth underwater, <a href="/wiki/Sunlight" title="Sunlight">sunlight</a> is absorbed, and the amount of visible <a href="/wiki/Light" title="Light">light</a> diminishes. Because absorption is greater for long <a href="/wiki/Wavelength" title="Wavelength">wavelengths</a> (red end of the <a href="/wiki/Visible_spectrum" title="Visible spectrum">visible spectrum</a>) than for short wavelengths (blue end of the visible spectrum), the <a href="/wiki/Optical_spectrum" class="mw-redirect" title="Optical spectrum">colour spectrum</a> is rapidly altered with increasing depth. White objects at the surface appear bluish underwater, and red objects appear dark, even black. Although light penetration will be less if water is <a href="/wiki/Turbidity" title="Turbidity">turbid</a>, in the very clear water of the open ocean less than 25% of the surface light reaches a depth of 10 m (33 feet). At 100 m (330 ft) the light present from the sun is normally about 0.5% of that at the surface.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (June 2016)">citation needed</span></a></i>]</sup> </p><p>The <a href="/wiki/Photic_zone" title="Photic zone">euphotic depth</a> is the depth at which light intensity falls to 1% of the value at the surface. This depth is dependent upon water clarity, being only a few metres underwater in a turbid estuary, but may reach up to 200 metres in the open ocean. At the euphotic depth, plants (such as <a href="/wiki/Phytoplankton" title="Phytoplankton">phytoplankton</a>) have no net energy gain from photosynthesis and thus cannot grow. </p> <div class="mw-heading mw-heading3"><h3 id="Temperature">Temperature</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=11" title="Edit section: Temperature"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>There are three layers of ocean temperature: the <a href="/wiki/Mixed_layer#Oceanic_mixed_layer" title="Mixed layer">surface layer</a>, the <a href="/wiki/Thermocline#Oceans" title="Thermocline">thermocline</a>, and the <a href="/wiki/Deep_sea" title="Deep sea">deep ocean</a>. The average temperature of surface layer is about 17 °C. About 90% of ocean's water is below the thermocline in the deep ocean, where most of the water is below 4 °C.<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> </p><p>There are temperature anomalies at active <a href="/wiki/Volcano" title="Volcano">volcanic sites</a> and <a href="/wiki/Hydrothermal_vent" title="Hydrothermal vent">hydrothermal vents</a>, where deep-water temperatures can significantly exceed 100 °C. </p> <div class="mw-heading mw-heading3"><h3 id="Thermal_conductivity">Thermal conductivity</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=12" title="Edit section: Thermal conductivity"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Water <a href="/wiki/Thermal_conductivity" class="mw-redirect" title="Thermal conductivity">conducts</a> heat around 25 times more efficiently than air. <a href="/wiki/Hypothermia" title="Hypothermia">Hypothermia</a>, a potentially fatal condition, occurs when the human body's core temperature falls below 35 °C. Insulating the body's warmth from water is the main purpose of <a href="/wiki/Diving_suit" title="Diving suit">diving suits</a> and <a href="/wiki/Exposure_suit" title="Exposure suit">exposure suits</a> when used in water temperatures below 25 °C. </p> <div class="mw-heading mw-heading3"><h3 id="Acoustic_properties">Acoustic properties</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=13" title="Edit section: Acoustic properties"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Underwater_acoustics" title="Underwater acoustics">Underwater acoustics</a></div> <p><a href="/wiki/Sound" title="Sound">Sound</a> is transmitted about 4.3 <a href="/wiki/Speed_of_sound" title="Speed of sound">times faster in water</a> (1,484 m/s in fresh water) than in air (343 m/s). The human brain can determine the direction of sound in air by detecting small differences in the time it takes for sound waves in air to reach each of the two ears. For these reasons, divers find it difficult to determine the direction of sound underwater. Some animals have adapted to this difference and many use sound to navigate underwater. </p> <div class="mw-heading mw-heading2"><h2 id="Ecosystems">Ecosystems</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=14" title="Edit section: Ecosystems"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main articles: <a href="/wiki/Aquatic_ecosystem" title="Aquatic ecosystem">Aquatic ecosystem</a>, <a href="/wiki/Freshwater_ecosystem" title="Freshwater ecosystem">Freshwater ecosystem</a>, and <a href="/wiki/Marine_ecosystem" title="Marine ecosystem">Marine ecosystem</a></div> <p>An <a href="/wiki/Aquatic_ecosystem" title="Aquatic ecosystem">aquatic ecosystem</a> is an <a href="/wiki/Ecosystem" title="Ecosystem">ecosystem</a> in a <a href="/wiki/Body_of_water" title="Body of water">body of water</a>. <a href="/wiki/Biocoenosis" title="Biocoenosis">Communities</a> of <a href="/wiki/Biota_(ecology)" class="mw-redirect" title="Biota (ecology)">organisms</a> that are dependent on each other and on their environment live in aquatic ecosystems. The two main types of aquatic ecosystems are <a href="/wiki/Marine_ecosystem" title="Marine ecosystem">marine ecosystems</a> and <a href="/wiki/Freshwater_ecosystem" title="Freshwater ecosystem">freshwater ecosystems</a>.<sup id="cite_ref-Alexander_1999_22-0" class="reference"><a href="#cite_note-Alexander_1999-22"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> </p><p>Marine ecosystems are the largest of <a href="/wiki/Earth" title="Earth">Earth</a>'s <a href="/wiki/Aquatic_ecosystem" title="Aquatic ecosystem">aquatic ecosystems</a> and are distinguished by waters that have a high salt content. Marine waters cover more than 70% of the surface of the Earth and account for more than 97% of Earth's water supply<sup id="cite_ref-Oceanic_Institute_23-0" class="reference"><a href="#cite_note-Oceanic_Institute-23"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-National_Geographic_24-0" class="reference"><a href="#cite_note-National_Geographic-24"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> and 90% of habitable space on Earth.<sup id="cite_ref-UNESCO_25-0" class="reference"><a href="#cite_note-UNESCO-25"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> Marine ecosystems include nearshore systems, such as the <a href="/wiki/Salt_marsh" title="Salt marsh">salt marshes</a>, <a href="/wiki/Mudflat" title="Mudflat">mudflats</a>, <a href="/wiki/Seagrass_meadow" title="Seagrass meadow">seagrass meadows</a>, <a href="/wiki/Mangrove" title="Mangrove">mangroves</a>, rocky <a href="/wiki/Intertidal_zone" title="Intertidal zone">intertidal systems</a> and <a href="/wiki/Coral_reefs" class="mw-redirect" title="Coral reefs">coral reefs</a>. They also extend from the coast to include offshore systems, such as the surface <a href="/wiki/Ocean" title="Ocean">ocean</a>, <a href="/wiki/Pelagic_zone" title="Pelagic zone">pelagic ocean</a> waters, the <a href="/wiki/Deep_sea" title="Deep sea">deep sea</a>, <a href="/wiki/Hydrothermal_vent" title="Hydrothermal vent">oceanic hydrothermal vents</a>, and the <a href="/wiki/Benthos" title="Benthos">sea floor</a>. Marine ecosystems are characterized by the biological <a href="/wiki/Marine_life" title="Marine life">community of organisms</a> that they are associated with and <a href="/wiki/Marine_habitats" class="mw-redirect" title="Marine habitats">their physical environment</a>. As the world ocean is the principal component of Earth's hydrosphere, it is integral to <a href="/wiki/Life" title="Life">life</a>, forms part of the <a href="/wiki/Carbon_cycle" title="Carbon cycle">carbon cycle</a>, and influences <a href="/wiki/Climate" title="Climate">climate</a> and <a href="/wiki/Weather" title="Weather">weather</a> patterns. The World Ocean is the <a href="/wiki/Habitat" title="Habitat">habitat</a> of 230,000 known <a href="/wiki/Species" title="Species">species</a>, but because much of it is unexplored, the number of species that exist in the ocean is much larger, possibly over two million.<sup id="cite_ref-Drogin_2009_26-0" class="reference"><a href="#cite_note-Drogin_2009-26"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> </p><p>Freshwater ecosystems include <a href="/wiki/Lake_ecosystem" title="Lake ecosystem">lakes</a> and <a href="/wiki/Pond" title="Pond">ponds</a>, <a href="/wiki/River_ecosystem" title="River ecosystem">rivers</a>, <a href="/wiki/Stream" title="Stream">streams</a>, <a href="/wiki/Spring_(hydrology)" title="Spring (hydrology)">springs</a>, <a href="/wiki/Aquifer" title="Aquifer">aquifers</a>, <a href="/wiki/Bog" title="Bog">bogs</a>, and <a href="/wiki/Wetland" title="Wetland">wetlands</a>. They have a lower <a href="/wiki/Salt" title="Salt">salt</a> content than marine ecosystems. Freshwater habitats can be classified by different factors, including temperature, light penetration, nutrients, and vegetation. Freshwater ecosystems can be divided into <a href="/wiki/Lentic_ecosystem" class="mw-redirect" title="Lentic ecosystem">lentic ecosystems</a> (still water) and <a href="/wiki/Lotic_ecosystem" class="mw-redirect" title="Lotic ecosystem">lotic ecosystems</a> (flowing water).<sup id="cite_ref-Wetzel_2001_27-0" class="reference"><a href="#cite_note-Wetzel_2001-27"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup> </p><p>Aquatic ecosystems are characterised by the limitation on ambient lighting due to absorption by the water itself and by dissolved and suspended matter in the water column, and by the support provided by buoyancy. Nutrients usable by plants are dissolved in the water, making them easily available. However, the interaction of light absorption by water, matter and living organisms themselves leads to very different light and light spectrum conditions depending on the respective ecosystem and its water depth. This affects photosynthesis and the ecology of plants and <a href="/wiki/Phytoplankton" title="Phytoplankton">phytoplankton</a>.<sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup> Outside the euphotic zone, photosynthesis cannot occur and life must use other sources of energy than sunlight. </p> <div class="mw-heading mw-heading2"><h2 id="Humans">Humans</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=15" title="Edit section: Humans"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main articles: <a href="/wiki/Underwater_diving" title="Underwater diving">Underwater diving</a> and <a href="/wiki/Science_of_underwater_diving" title="Science of underwater diving">Science of underwater diving</a></div> <p>Although a number of <a href="/wiki/Human" title="Human">human</a> activities are conducted underwater—such as research, <a href="/wiki/Underwater_diving" title="Underwater diving">underwater diving</a> for <a href="/wiki/Professional_diving" title="Professional diving">work</a> or <a href="/wiki/Recreational_diving" title="Recreational diving">recreation</a>, and <a href="/wiki/Underwater_warfare" title="Underwater warfare">underwater warfare</a> with <a href="/wiki/Submarines" class="mw-redirect" title="Submarines">submarines</a>, the underwater environment is hostile to humans in many ways and therefore little explored. </p><p>An immediate obstacle to human activity under water is that human <a href="/wiki/Lung" title="Lung">lungs</a> cannot naturally function in this environment. Unlike the <a href="/wiki/Gill" title="Gill">gills</a> of <a href="/wiki/Fish" title="Fish">fish</a>, human lungs are adapted to the exchange of <a href="/wiki/Gas" title="Gas">gases</a> at atmospheric <a href="/wiki/Pressure" title="Pressure">pressure</a>. Any penetration into the underwater environment for more than a few minutes requires <a href="/wiki/Underwater_breathing_apparatus" title="Underwater breathing apparatus">artificial aids</a> to maintain life. </p><p>For solid and liquid tissues like bone, muscle and blood, the high ambient pressure is not much of a problem; but it is a problem for any gas-filled spaces like the <a href="/wiki/Mouth" title="Mouth">mouth</a>, <a href="/wiki/Ear" title="Ear">ears</a>, <a href="/wiki/Paranasal_sinus" class="mw-redirect" title="Paranasal sinus">paranasal sinuses</a> and lungs. This is because the gas in those spaces is much more compressible than the solids and liquids, and reduces in volume much more when under pressure and so does not provide those spaces with support against the higher outside pressure. Even at a depth of 8 ft (2.4 m) underwater, an inability to <a href="/wiki/Ear_clearing" title="Ear clearing">equalize air pressure</a> in the <a href="/wiki/Middle_ear" title="Middle ear">middle ear</a> with outside water pressure can cause pain, and the <a href="/wiki/Tympanic_membrane" class="mw-redirect" title="Tympanic membrane">tympanic membrane</a> (eardrum) can rupture at depths under 10 ft (3 m). The danger of <a href="/wiki/Barotrauma" title="Barotrauma">pressure damage</a> is greatest in shallow water because the ratio of pressure change is greatest near the surface of the water. The raised pressure also affects the solution of <a href="/wiki/Breathing_gas" title="Breathing gas">breathing gases</a> in the tissues over time, and can lead to a range of adverse effects, such as <a href="/wiki/Inert_gas_narcosis" class="mw-redirect" title="Inert gas narcosis">inert gas narcosis</a>, and <a href="/wiki/Oxygen_toxicity" title="Oxygen toxicity">oxygen toxicity</a>. <a href="/wiki/Decompression_(diving)" title="Decompression (diving)">Decompression</a> must be controlled to avoid bubble formation in the tissues and the consequent symptoms of <a href="/wiki/Decompression_sickness" title="Decompression sickness">decompression sickness</a>. </p><p>With a few exceptions, the underwater environment tends to cool the unprotected human body. This heat loss will generally lead to hypothermia eventually. </p> <div class="mw-heading mw-heading3"><h3 id="Hazards">Hazards</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=16" title="Edit section: Hazards"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Hazard" title="Hazard">Hazard</a>, <a href="/wiki/List_of_diving_hazards_and_precautions" title="List of diving hazards and precautions">List of diving hazards and precautions</a>, <a href="/wiki/Human_factors_in_diving_safety" title="Human factors in diving safety">Human factors in diving safety</a>, and <a href="/wiki/List_of_diving_environments_by_hazard" class="mw-redirect" title="List of diving environments by hazard">List of diving environments by hazard</a></div> <p>There are several classes of hazards to humans inherent to the underwater environment. </p> <ul><li>Absence of breathable gas, which can cause <a href="/wiki/Asphyxia" title="Asphyxia">asphyxia</a>, specifically by <a href="/wiki/Drowning" title="Drowning">drowning</a>.</li> <li>Ambient pressures which could cause <a href="/wiki/Barotrauma" title="Barotrauma">barotrauma</a>, or toxic effects of breathing gas components at raised partial pressures.</li> <li>Ambient temperatures which may lead to <a href="/wiki/Hypothermia" title="Hypothermia">hypothermia</a>, or in unusual cases, to <a href="/wiki/Hyperthermia" title="Hyperthermia">hyperthermia</a>, due to high rates of heat exchange.</li> <li>Solution of inert breathing gas components may lead to <a href="/wiki/Decompression_sickness" title="Decompression sickness">decompression sickness</a> if <a href="/wiki/Decompression_(diving)" title="Decompression (diving)">decompression</a> is too rapid.</li> <li>Entrainment of diver by moving water in <a href="/wiki/Ocean_current" title="Ocean current">currents</a> and <a href="/wiki/Wind_wave" title="Wind wave">waves</a> can cause injury by impacting the diver against hard objects or moving them to inappropriate depths.</li> <li><a href="/wiki/List_of_diving_hazards_and_precautions#The_specific_diving_environment" title="List of diving hazards and precautions">Dangerous aquatic organisms</a> of various sorts.</li></ul> <div class="mw-heading mw-heading3"><h3 id="Ambient_pressure_diving">Ambient pressure diving</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=17" title="Edit section: Ambient pressure diving"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Underwater_diving" title="Underwater diving">Underwater diving</a> and <a href="/wiki/Underwater_habitat" title="Underwater habitat">Underwater habitat</a></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Tektite_I_exterior.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/Tektite_I_exterior.jpg/220px-Tektite_I_exterior.jpg" decoding="async" width="220" height="147" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/Tektite_I_exterior.jpg/330px-Tektite_I_exterior.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a2/Tektite_I_exterior.jpg/440px-Tektite_I_exterior.jpg 2x" data-file-width="1801" data-file-height="1206" /></a><figcaption>Tektite I underwater habitat with ambient pressure divers using scuba</figcaption></figure> <p>In ambient pressure diving, the diver is directly exposed to the pressure of the surrounding water. The ambient pressure diver may dive on breath-hold, or use breathing apparatus for <a href="/wiki/Scuba_diving" title="Scuba diving">scuba diving</a> or <a href="/wiki/Surface-supplied_diving" title="Surface-supplied diving">surface-supplied diving</a>, and the <a href="/wiki/Saturation_diving" title="Saturation diving">saturation diving</a> technique reduces the risk of <a href="/wiki/Decompression_sickness" title="Decompression sickness">decompression sickness</a> (DCS) after long-duration deep dives. Immersion in water and exposure to cold water and high pressure have physiological effects on the diver which limit the depths and duration possible in ambient pressure diving. Breath-hold endurance is a severe limitation, and breathing at high ambient pressure adds further complications, both directly and indirectly. Technological solutions have been developed which can greatly extend depth and duration of human ambient pressure dives, and allow useful work to be done underwater.<sup id="cite_ref-ECHM-EDTM_2011_29-0" class="reference"><a href="#cite_note-ECHM-EDTM_2011-29"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Atmospheric_pressure_diving">Atmospheric pressure diving</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=18" title="Edit section: Atmospheric pressure diving"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Atmospheric_diving_suit" title="Atmospheric diving suit">Atmospheric diving suit</a></div> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Newtsuit_atmospheric_diving_suit.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d9/Newtsuit_atmospheric_diving_suit.jpg/220px-Newtsuit_atmospheric_diving_suit.jpg" decoding="async" width="220" height="331" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d9/Newtsuit_atmospheric_diving_suit.jpg/330px-Newtsuit_atmospheric_diving_suit.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d9/Newtsuit_atmospheric_diving_suit.jpg/440px-Newtsuit_atmospheric_diving_suit.jpg 2x" data-file-width="768" data-file-height="1156" /></a><figcaption>The <a href="/wiki/Newtsuit" title="Newtsuit">Newtsuit</a> has fully articulated, rotary joints in the arms and legs. These provide great mobility, while remaining largely unaffected by high pressures.</figcaption></figure> <p>A diver can be isolated from the ambient pressure by using an atmospheric diving suit (ADS), which is a small one-person articulated <a href="/wiki/Anthropomorphic" class="mw-redirect" title="Anthropomorphic">anthropomorphic</a> <a href="/wiki/Submersible" title="Submersible">submersible</a> which resembles a <a href="/wiki/Plate_armour" title="Plate armour">suit of armour</a>, with elaborate pressure resisting joints to allow articulation while maintaining an internal pressure of one atmosphere. An ADS can be used for relatively deep dives of up to 2,300 feet (700 m) for many hours, and eliminates the majority of significant physiological dangers associated with deep diving; the occupant need not decompress, there is no need for special gas mixtures, nor is there danger of <a href="/wiki/Decompression_sickness" title="Decompression sickness">decompression sickness</a> or <a href="/wiki/Nitrogen_narcosis" title="Nitrogen narcosis">nitrogen narcosis</a>, and the diver is effectively isolated from most aquatic organisms.<sup id="cite_ref-30" class="reference"><a href="#cite_note-30"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> Divers do not even need to be skilled swimmers, but mobility and dexterity are significantly degraded. </p> <div class="mw-heading mw-heading3"><h3 id="Submersibles_and_submarines">Submersibles and submarines</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=19" title="Edit section: Submersibles and submarines"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main articles: <a href="/wiki/Submersible" title="Submersible">Submersible</a> and <a href="/wiki/Submarine" title="Submarine">Submarine</a></div> <p>A submersible is a small <a href="/wiki/Watercraft" title="Watercraft">watercraft</a> designed to operate underwater. The term <i>submersible</i> is often used to differentiate from other underwater vessels known as <a href="/wiki/Submarine" title="Submarine">submarines</a>, in that a submarine is a fully autonomous craft, capable of renewing its own power and breathing air, whereas a submersible is usually supported by a surface vessel, platform, shore team or sometimes a larger submarine. There are many types of submersibles, including both manned and unmanned craft, otherwise known as <a href="/wiki/Remotely_operated_vehicle" class="mw-redirect" title="Remotely operated vehicle">remotely operated vehicles</a> or ROVs.<sup id="cite_ref-Canadian_Encyclopedia_31-0" class="reference"><a href="#cite_note-Canadian_Encyclopedia-31"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Remotely_operated_or_autonomous_vehicles">Remotely operated or autonomous vehicles</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=20" title="Edit section: Remotely operated or autonomous vehicles"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Remotely_operated_underwater_vehicle" title="Remotely operated underwater vehicle">Remotely operated underwater vehicle</a> and <a href="/wiki/Autonomous_underwater_vehicle" title="Autonomous underwater vehicle">Autonomous underwater vehicle</a></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:ROV_working_on_a_subsea_structure.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/99/ROV_working_on_a_subsea_structure.jpg/220px-ROV_working_on_a_subsea_structure.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/99/ROV_working_on_a_subsea_structure.jpg/330px-ROV_working_on_a_subsea_structure.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/99/ROV_working_on_a_subsea_structure.jpg/440px-ROV_working_on_a_subsea_structure.jpg 2x" data-file-width="2400" data-file-height="1800" /></a><figcaption>ROV working on a subsea structure</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:MiniU.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d2/MiniU.jpg/220px-MiniU.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d2/MiniU.jpg/330px-MiniU.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d2/MiniU.jpg/440px-MiniU.jpg 2x" data-file-width="2048" data-file-height="1536" /></a><figcaption><a href="/wiki/Pluto_Plus" title="Pluto Plus">Pluto Plus</a> AUV for underwater mine identification and destruction. From Norwegian minehunter KNM Hinnøy</figcaption></figure> <p>Remotely operated underwater vehicles and autonomous underwater vehicles are part of a larger group of undersea systems known as <a href="/wiki/Unmanned_underwater_vehicle" title="Unmanned underwater vehicle">unmanned underwater vehicles</a>. ROVs are unoccupied, usually highly maneuverable, and operated by a crew either aboard a vessel/floating platform or on proximate land. They are linked to a host ship by a neutrally buoyant <a href="/wiki/Tether" title="Tether">tether</a>, or a load-carrying <a href="/wiki/Umbilical_cable" title="Umbilical cable">umbilical cable</a> is used along with a tether management system (TMS). The umbilical cable contains a group of <a href="/wiki/Electrical_conductor" title="Electrical conductor">electrical conductors</a> and fiber optics that carry electric power, video, and data signals between the operator and the TMS. Where used, the TMS then relays the signals and power for the ROV down the tether cable. Once at the ROV, the electric power is distributed between the components of the ROV. In high-power applications, most of the electric power drives a high-power electric motor which drives a <a href="/wiki/Hydraulic_pump" title="Hydraulic pump">hydraulic pump</a> for propulsion and to power equipment. Most ROVs are equipped with at least a video camera and lights. Additional equipment is commonly added to expand the vehicle's capabilities. Autonomous underwater vehicles (AUVs) are <a href="/wiki/Robot" title="Robot">robots</a> that travel underwater without requiring input from an operator. <a href="/wiki/Underwater_glider" title="Underwater glider">Underwater gliders</a> are a subclass of AUVs.<sup id="cite_ref-ROV_32-0" class="reference"><a href="#cite_note-ROV-32"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Sciences">Sciences</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=21" title="Edit section: Sciences"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Hydrology" title="Hydrology">Hydrology</a> – Science of the movement, distribution, and quality of water on Earth</li> <li><a href="/wiki/Hydrography" title="Hydrography">Hydrography</a> – Measurement of bodies of water</li> <li><a href="/wiki/Limnology" title="Limnology">Limnology</a> – Science of inland aquatic ecosystems</li> <li><a href="/wiki/Marine_biology" title="Marine biology">Marine biology</a> – Scientific study of organisms that live in the ocean</li> <li><a href="/wiki/Marine_chemistry" title="Marine chemistry">Marine chemistry</a> – Chemistry of oceans and seas</li> <li><a href="/wiki/Marine_ecology" class="mw-redirect" title="Marine ecology">Marine ecology</a> – The study of the interactions between organisms and environment in the sea</li> <li><a href="/wiki/Marine_geology" title="Marine geology">Marine geology</a> – Study of the history and structure of the ocean floor</li> <li><a href="/wiki/Oceanography" title="Oceanography">Oceanography</a> – Study of physical, chemical, and biological processes in the ocean</li> <li><a href="/wiki/Potamology" title="Potamology">Potamology</a> – Study of rivers</li> <li><a href="/wiki/Underwater_archaeology" title="Underwater archaeology">Underwater archaeology</a> – Archaeological techniques practiced at underwater sites</li></ul> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=22" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Timeline_of_diving_technology" title="Timeline of diving technology">Timeline of diving technology</a> – Chronological list of notable events in the history of underwater diving equipment</li> <li><a href="/wiki/Underwater_acoustics" title="Underwater acoustics">Underwater acoustics</a> – Study of the propagation of sound in water</li> <li><a href="/wiki/Underwater_photography" title="Underwater photography">Underwater photography</a> – Genre of photography</li> <li><a href="/wiki/Underwater_vision" title="Underwater vision">Underwater vision</a> – The ability to see objects underwater</li> <li><a href="/wiki/Science_of_underwater_diving" title="Science of underwater diving">Science of underwater diving</a> – Scientific concepts that are closely associated with underwater diving</li> <li><a href="/wiki/UNESCO_Convention_on_the_Protection_of_the_Underwater_Cultural_Heritage" class="mw-redirect" title="UNESCO Convention on the Protection of the Underwater Cultural Heritage">UNESCO Convention on the Protection of the Underwater Cultural Heritage</a> – Treaty adopted on 2 November 2001</li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=23" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-pri.ocean-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-pri.ocean_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://wordnetweb.princeton.edu/perl/webwn?s=ocean">"WordNet Search — ocean"</a>. 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Archived from <a rel="nofollow" class="external text" href="http://www.thecanadianencyclopedia.ca/en/article/submersible/">the original</a> on 2017-12-04<span class="reference-accessdate">. Retrieved <span class="nowrap">2019-08-09</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.atitle=Submersible&rft.btitle=The+Canadian+Encyclopedia&rft.date=2011&rft_id=http%3A%2F%2Fwww.thecanadianencyclopedia.ca%2Fen%2Farticle%2Fsubmersible%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AUnderwater+environment" class="Z3988"></span>. <i>The Canadian Encyclopedia</i>. F.J. Chambers 02/07/2006 <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20120315165803/http://www.thecanadianencyclopedia.com/index.cfm?PgNm=TCE&Params=A1ARTA000776">"Cyrus Albert Birge - the Canadian Encyclopedia"</a>. Archived from the original on March 15, 2012<span class="reference-accessdate">. Retrieved <span class="nowrap">2011-10-20</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Cyrus+Albert+Birge+-+the+Canadian+Encyclopedia&rft_id=http%3A%2F%2Fwww.thecanadianencyclopedia.com%2Findex.cfm%3FPgNm%3DTCE%26Params%3DA1ARTA000776&rfr_id=info%3Asid%2Fen.wikipedia.org%3AUnderwater+environment" class="Z3988"></span><span class="cs1-maint citation-comment"><code class="cs1-code">{{<a href="/wiki/Template:Cite_web" title="Template:Cite web">cite web</a>}}</code>: CS1 maint: bot: original URL status unknown (<a href="/wiki/Category:CS1_maint:_bot:_original_URL_status_unknown" title="Category:CS1 maint: bot: original URL status unknown">link</a>)</span></span> </li> <li id="cite_note-ROV-32"><span class="mw-cite-backlink"><b><a href="#cite_ref-ROV_32-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20160701191924/http://maritime.about.com/od/Innovation/a/Remotely-Operated-Vehicle-Design-And-Function.htm">"Remotely Operated Vehicle Design and Function"</a>. <i>Maritime About</i>. Archived from <a rel="nofollow" class="external text" href="http://maritime.about.com/od/Innovation/a/Remotely-Operated-Vehicle-Design-And-Function.htm">the original</a> on 1 July 2016<span class="reference-accessdate">. Retrieved <span class="nowrap">4 June</span> 2016</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Maritime+About&rft.atitle=Remotely+Operated+Vehicle+Design+and+Function&rft_id=http%3A%2F%2Fmaritime.about.com%2Fod%2FInnovation%2Fa%2FRemotely-Operated-Vehicle-Design-And-Function.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AUnderwater+environment" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Footnotes">Footnotes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Underwater_environment&action=edit&section=24" title="Edit section: Footnotes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626"><div class="reflist reflist-lower-alpha"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-18"><span class="mw-cite-backlink"><b><a href="#cite_ref-18">^</a></b></span> <span class="reference-text">(1-0.95865/1.00000) × 100% = 4.135%</span> </li> </ol></div></div> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist 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style="font-size:114%;margin:0 4em"><a href="/wiki/Underwater_diving" title="Underwater diving">Underwater diving</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><a href="/wiki/Diving_activities" title="Diving activities">Diving activities</a></li> <li><a href="/wiki/Diving_mode" class="mw-redirect" title="Diving mode">Diving modes</a> <ul><li><a href="/wiki/Atmospheric_pressure_diving" class="mw-redirect" title="Atmospheric pressure diving">Atmospheric pressure diving</a></li> <li><a href="/wiki/Freediving" title="Freediving">Freediving</a></li> <li><a href="/wiki/Saturation_diving" title="Saturation diving">Saturation diving</a></li> <li><a href="/wiki/Scuba_diving" title="Scuba diving">Scuba diving</a></li> <li><a href="/wiki/Snorkeling" title="Snorkeling">Snorkeling</a></li> <li><a href="/wiki/Surface_oriented_diving" class="mw-redirect" title="Surface oriented diving">Surface oriented diving</a></li> <li><a href="/wiki/Surface-supplied_diving" title="Surface-supplied diving">Surface-supplied diving</a></li> <li><a href="/wiki/Unmanned_diving" class="mw-redirect" title="Unmanned diving">Unmanned diving</a></li></ul></li></ul> </div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Diving_equipment" style="font-size:114%;margin:0 4em"><a href="/wiki/Diving_equipment" title="Diving equipment">Diving equipment</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cleaning_and_disinfection_of_personal_diving_equipment" title="Cleaning and disinfection of personal diving equipment">Cleaning and disinfection of personal diving equipment</a></li> <li><a href="/wiki/Human_factors_in_diving_equipment_design" title="Human factors in diving equipment design">Human factors in diving equipment design</a></li> <li><a href="/wiki/List_of_diving_equipment_manufacturers" title="List of diving equipment manufacturers">List of diving equipment manufacturers</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Basic equipment</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Diving_mask" title="Diving mask">Diving mask</a></li> <li><a href="/wiki/Snorkel_(swimming)" title="Snorkel (swimming)">Snorkel</a></li> <li><a href="/wiki/Swimfin" title="Swimfin">Swimfin</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Breathing_gas" title="Breathing gas">Breathing gas</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bailout_gas" class="mw-redirect" title="Bailout gas">Bailout gas</a></li> <li><a href="/wiki/Bottom_gas" class="mw-redirect" title="Bottom gas">Bottom gas</a></li> <li><a href="/wiki/Breathing_air" class="mw-redirect" title="Breathing air">Breathing air</a></li> <li><a href="/wiki/Decompression_gas" class="mw-redirect" title="Decompression gas">Decompression gas</a></li> <li><a href="/wiki/Emergency_gas_supply" class="mw-redirect" title="Emergency gas supply">Emergency gas supply</a></li> <li><a href="/wiki/Heliox" title="Heliox">Heliox</a></li> <li><a href="/wiki/Hydreliox" title="Hydreliox">Hydreliox</a></li> <li><a href="/wiki/Hydrox_(breathing_gas)" title="Hydrox (breathing gas)">Hydrox</a></li> <li><a href="/wiki/Nitrox" title="Nitrox">Nitrox</a></li> <li><a href="/wiki/Oxygen" title="Oxygen">Oxygen</a></li> <li><a href="/wiki/Travel_gas" class="mw-redirect" title="Travel gas">Travel gas</a></li> <li><a href="/wiki/Trimix_(breathing_gas)" title="Trimix (breathing gas)">Trimix</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Buoyancy and<br />trim equipment</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Avelo_diving_system" title="Avelo diving system">Avelo diving system</a></li> <li><a href="/wiki/Buoyancy_compensator_(diving)" title="Buoyancy compensator (diving)">Buoyancy compensator</a> <ul><li><a href="/wiki/Power_inflator" class="mw-redirect" title="Power inflator">Power inflator</a></li> <li><a href="/wiki/Dump_valve_(diving)" class="mw-redirect" title="Dump valve (diving)">Dump valve</a></li> <li><a href="/wiki/Variable_buoyancy_pressure_vessel" class="mw-redirect" title="Variable buoyancy pressure vessel">Variable buoyancy pressure vessel</a></li></ul></li> <li><a href="/wiki/Diving_weighting_system" title="Diving weighting system">Diving weighting system</a> <ul><li><a href="/wiki/Ankle_weights_(diving)" class="mw-redirect" title="Ankle weights (diving)">Ankle weights</a></li> <li><a href="/wiki/Integrated_weights" class="mw-redirect" title="Integrated weights">Integrated weights</a></li> <li><a href="/wiki/Trim_weights_(diving)" class="mw-redirect" title="Trim weights (diving)">Trim weights</a></li> <li><a href="/wiki/Weight_belt" class="mw-redirect" title="Weight belt">Weight belt</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Decompression_equipment" title="Decompression equipment">Decompression<br />equipment</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Decompression_buoy" class="mw-redirect" title="Decompression buoy">Decompression buoy</a></li> <li><a href="/wiki/Decompression_chamber" class="mw-redirect" title="Decompression chamber">Decompression chamber</a></li> <li><a href="/wiki/Decompression_cylinder" class="mw-redirect" title="Decompression cylinder">Decompression cylinder</a></li> <li><a href="/wiki/Decompression_trapeze" class="mw-redirect" title="Decompression trapeze">Decompression trapeze</a></li> <li><a href="/wiki/Dive_computer" title="Dive computer">Dive computer</a></li> <li><a href="/wiki/Diving_bell" title="Diving bell">Diving bell</a></li> <li><a href="/wiki/Diving_shot" title="Diving shot">Diving shot</a></li> <li><a href="/wiki/Diving_stage" class="mw-redirect" title="Diving stage">Diving stage</a></li> <li><a href="/wiki/Jersey_upline" class="mw-redirect" title="Jersey upline">Jersey upline</a></li> <li><a href="/wiki/Jonline" class="mw-redirect" title="Jonline">Jonline</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Diving_suit" title="Diving suit">Diving suit</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Atmospheric_diving_suit" title="Atmospheric diving suit">Atmospheric diving suit</a> <ul><li><a href="/wiki/JIM_suit" title="JIM suit">JIM suit</a></li> <li><a href="/wiki/Newtsuit" title="Newtsuit">Newtsuit</a></li></ul></li> <li><a href="/wiki/Dry_suit" title="Dry suit">Dry suit</a> <ul><li><a href="/wiki/Sladen_suit" class="mw-redirect" title="Sladen suit">Sladen suit</a></li> <li><a href="/wiki/Standard_diving_suit" class="mw-redirect" title="Standard diving suit">Standard diving suit</a></li></ul></li> <li><a href="/wiki/Rash_vest" class="mw-redirect" title="Rash vest">Rash vest</a></li> <li><a href="/wiki/Wetsuit" title="Wetsuit">Wetsuit</a> <ul><li><a href="/wiki/Dive_skins" class="mw-redirect" title="Dive skins">Dive skins</a></li> <li><a href="/wiki/Hot-water_suit" class="mw-redirect" title="Hot-water suit">Hot-water suit</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Helmets<br />and masks</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Anti-fog" title="Anti-fog">Anti-fog</a></li> <li><a href="/wiki/Diving_helmet" title="Diving helmet">Diving helmet</a> <ul><li><a href="/wiki/Free-flow_helmet" class="mw-redirect" title="Free-flow helmet">Free-flow helmet</a></li> <li><a href="/wiki/Lightweight_demand_helmet" class="mw-redirect" title="Lightweight demand helmet">Lightweight demand helmet</a></li> <li><a href="/wiki/Orinasal_mask" title="Orinasal mask">Orinasal mask</a></li> <li><a href="/wiki/Reclaim_helmet" class="mw-redirect" title="Reclaim helmet">Reclaim helmet</a></li> <li><a href="/wiki/Shallow_water_helmet" class="mw-redirect" title="Shallow water helmet">Shallow water helmet</a></li> <li><a href="/wiki/Standard_diving_helmet" class="mw-redirect" title="Standard diving helmet">Standard diving helmet</a></li></ul></li> <li><a href="/wiki/Diving_mask" title="Diving mask">Diving mask</a> <ul><li><a href="/wiki/Band_mask" class="mw-redirect" title="Band mask">Band mask</a></li> <li><a href="/wiki/Full-face_mask" class="mw-redirect" title="Full-face mask">Full-face mask</a></li> <li><a href="/wiki/Half_mask" class="mw-redirect" title="Half mask">Half mask</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Instrumentation</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bottom_timer" class="mw-redirect" title="Bottom timer">Bottom timer</a></li> <li><a href="/wiki/Depth_gauge" title="Depth gauge">Depth gauge</a></li> <li><a href="/wiki/Dive_computer" title="Dive computer">Dive computer</a></li> <li><a href="/wiki/Dive_timer" class="mw-redirect" title="Dive timer">Dive timer</a></li> <li><a href="/wiki/Diving_watch" title="Diving watch">Diving watch</a> <ul><li><a href="/wiki/Helium_release_valve" title="Helium release valve">Helium release valve</a></li></ul></li> <li><a href="/wiki/Electro-galvanic_oxygen_sensor" title="Electro-galvanic oxygen sensor">Electro-galvanic oxygen sensor</a></li> <li><a href="/wiki/Pneumofathometer" class="mw-redirect" title="Pneumofathometer">Pneumofathometer</a></li> <li><a href="/wiki/Submersible_pressure_gauge" class="mw-redirect" title="Submersible pressure gauge">Submersible pressure gauge</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Mobility<br />equipment</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Diver_propulsion_vehicle" title="Diver propulsion vehicle">Diver propulsion vehicle</a></li> <li><a href="/wiki/Diving_bell" title="Diving bell">Diving bell</a> <ul><li><a href="/wiki/Closed_bell" class="mw-redirect" title="Closed bell">Closed bell</a></li> <li><a href="/wiki/Wet_bell" class="mw-redirect" title="Wet bell">Wet bell</a></li></ul></li> <li><a href="/wiki/Diving_stage" class="mw-redirect" title="Diving stage">Diving stage</a></li> <li><a href="/wiki/Swimfin" title="Swimfin">Swimfin</a> <ul><li><a href="/wiki/Monofin" title="Monofin">Monofin</a></li> <li><a href="/wiki/PowerSwim" title="PowerSwim">PowerSwim</a></li></ul></li> <li><a href="/wiki/Towboard" title="Towboard">Towboard</a></li> <li><a href="/wiki/Wet_sub" title="Wet sub">Wet sub</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Safety<br />equipment</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Alternative_air_source" title="Alternative air source">Alternative air source</a> <ul><li><a href="/wiki/Octopus_regulator" class="mw-redirect" title="Octopus regulator">Octopus regulator</a></li> <li><a href="/wiki/Pony_bottle" title="Pony bottle">Pony bottle</a></li></ul></li> <li><a href="/wiki/Bolt_snap" title="Bolt snap">Bolt snap</a></li> <li><a href="/wiki/Buddy_line" class="mw-redirect" title="Buddy line">Buddy line</a></li> <li><a href="/wiki/Dive_light" title="Dive light">Dive light</a></li> <li><a href="/wiki/Diver%27s_cutting_tool" class="mw-redirect" title="Diver's cutting tool">Diver's cutting tool</a> <ul><li><a href="/wiki/Diver%27s_knife" class="mw-redirect" title="Diver's knife">Diver's knife</a></li></ul></li> <li><a href="/wiki/Diver%27s_telephone" class="mw-redirect" title="Diver's telephone">Diver's telephone</a></li> <li><a href="/wiki/Through-water_communications" class="mw-redirect" title="Through-water communications">Through-water communications</a> <ul><li><a href="/wiki/Underwater_acoustic_communication" title="Underwater acoustic communication">Underwater acoustic communication</a></li></ul></li> <li><a href="/wiki/Diving_bell" title="Diving bell">Diving bell</a></li> <li><a href="/wiki/Diving_safety_harness" class="mw-redirect" title="Diving safety harness">Diving safety harness</a></li> <li><a href="/wiki/Emergency_gas_supply" class="mw-redirect" title="Emergency gas supply">Emergency gas supply</a> <ul><li><a href="/wiki/Bailout_block" class="mw-redirect" title="Bailout block">Bailout block</a></li> <li><a href="/wiki/Bailout_bottle" title="Bailout bottle">Bailout bottle</a></li></ul></li> <li><a href="/wiki/Lifeline_(diving)" class="mw-redirect" title="Lifeline (diving)">Lifeline</a> <ul><li><a href="/wiki/Screw_gate_carabiner" class="mw-redirect" title="Screw gate carabiner">Screw gate carabiner</a></li></ul></li> <li><a href="/wiki/Emergency_locator_beacon" title="Emergency locator beacon">Emergency locator beacon</a></li> <li><a href="/wiki/Rescue_tether" class="mw-redirect" title="Rescue tether">Rescue tether</a></li> <li><a href="/wiki/Safety_helmet" class="mw-redirect" title="Safety helmet">Safety helmet</a></li> <li><a href="/wiki/Shark-proof_cage" class="mw-redirect" title="Shark-proof cage">Shark-proof cage</a></li> <li><a href="/wiki/Snoopy_loop" class="mw-redirect" title="Snoopy loop">Snoopy loop</a></li> <li>Navigation equipment <ul><li><a href="/wiki/Distance_line" title="Distance line">Distance line</a></li> <li><a href="/wiki/Diving_compass" class="mw-redirect" title="Diving compass">Diving compass</a></li> <li><a href="/wiki/Dive_reel" class="mw-redirect" title="Dive reel">Dive reel</a></li> <li><a href="/wiki/Line_marker" title="Line marker">Line marker</a></li> <li><a href="/wiki/Surface_marker_buoy" title="Surface marker buoy">Surface marker buoy</a></li> <li><a href="/wiki/Silt_screw" class="mw-redirect" title="Silt screw">Silt screw</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Underwater_breathing_apparatus" title="Underwater breathing apparatus">Underwater<br />breathing<br />apparatus</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Atmospheric_diving_suit" title="Atmospheric diving suit">Atmospheric diving suit</a></li> <li><a href="/wiki/Diving_cylinder" title="Diving cylinder">Diving cylinder</a> <ul><li><a href="/wiki/Burst_disc" class="mw-redirect" title="Burst disc">Burst disc</a></li> <li><a href="/wiki/Scuba_cylinder_valve" title="Scuba cylinder valve">Scuba cylinder valve</a></li></ul></li> <li><a href="/wiki/Diving_helmet" title="Diving helmet">Diving helmet</a> <ul><li><a href="/wiki/Reclaim_helmet" class="mw-redirect" title="Reclaim helmet">Reclaim helmet</a></li></ul></li> <li><a href="/wiki/Diving_regulator" title="Diving regulator">Diving regulator</a> <ul><li><a href="/wiki/Mechanism_of_diving_regulators" title="Mechanism of diving regulators">Mechanism of diving regulators</a></li> <li><a href="/wiki/Regulator_malfunction" class="mw-redirect" title="Regulator malfunction">Regulator malfunction</a> <ul><li><a href="/wiki/Regulator_freeze" class="mw-redirect" title="Regulator freeze">Regulator freeze</a></li></ul></li> <li><a href="/wiki/Single-hose_regulator" class="mw-redirect" title="Single-hose regulator">Single-hose regulator</a></li> <li><a href="/wiki/Twin-hose_regulator" class="mw-redirect" title="Twin-hose regulator">Twin-hose regulator</a></li></ul></li> <li><a href="/wiki/Full-face_diving_mask" title="Full-face diving mask">Full-face diving mask</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Open-circuit_scuba" class="mw-redirect" title="Open-circuit scuba">Open-circuit<br />scuba</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Scuba_set" title="Scuba set">Scuba set</a> <ul><li><a href="/wiki/Bailout_bottle" title="Bailout bottle">Bailout bottle</a></li> <li><a href="/wiki/Decompression_cylinder" class="mw-redirect" title="Decompression cylinder">Decompression cylinder</a></li> <li><a href="/wiki/Independent_doubles" class="mw-redirect" title="Independent doubles">Independent doubles</a></li> <li><a href="/wiki/Manifolded_twin_set" class="mw-redirect" title="Manifolded twin set">Manifolded twin set</a> <ul><li><a href="/wiki/Scuba_manifold" title="Scuba manifold">Scuba manifold</a></li></ul></li> <li><a href="/wiki/Pony_bottle" title="Pony bottle">Pony bottle</a></li> <li><a href="/wiki/Scuba_configuration" class="mw-redirect" title="Scuba configuration">Scuba configuration</a></li> <li><a href="/wiki/Sidemount" class="mw-redirect" title="Sidemount">Sidemount</a></li> <li><a href="/wiki/Sling_cylinder" class="mw-redirect" title="Sling cylinder">Sling cylinder</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Diving_rebreather" title="Diving rebreather">Diving rebreathers</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Carbon_dioxide_scrubber" title="Carbon dioxide scrubber">Carbon dioxide scrubber</a></li> <li><a href="/wiki/Carleton_CDBA" class="mw-redirect" title="Carleton CDBA">Carleton CDBA</a></li> <li><a href="/wiki/Clearance_Divers_Life_Support_Equipment" title="Clearance Divers Life Support Equipment">Clearance Divers Life Support Equipment</a></li> <li><a href="/wiki/Cryogenic_rebreather" class="mw-redirect" title="Cryogenic rebreather">Cryogenic rebreather</a></li> <li><a href="/wiki/CUMA" title="CUMA">CUMA</a></li> <li><a href="/wiki/DSEA" class="mw-redirect" title="DSEA">DSEA</a></li> <li><a href="/wiki/Dr%C3%A4ger_Dolphin" class="mw-redirect" title="Dräger Dolphin">Dolphin</a></li> <li><a href="/wiki/Halcyon_PVR-BASC" title="Halcyon PVR-BASC">Halcyon PVR-BASC</a></li> <li><a href="/wiki/Halcyon_RB80" title="Halcyon RB80">Halcyon RB80</a></li> <li><a href="/wiki/IDA71" title="IDA71">IDA71</a></li> <li><a href="/wiki/Interspiro_DCSC" title="Interspiro DCSC">Interspiro DCSC</a></li> <li><a href="/wiki/LAR-5" class="mw-redirect" title="LAR-5">LAR-5</a></li> <li><a href="/wiki/LAR-6" class="mw-redirect" title="LAR-6">LAR-6</a></li> <li><a href="/wiki/LAR-V" class="mw-redirect" title="LAR-V">LAR-V</a></li> <li><a href="/wiki/Lambertsen_Amphibious_Respiratory_Unit" title="Lambertsen Amphibious Respiratory Unit">LARU</a></li> <li><a href="/wiki/Mark_IV_Amphibian" title="Mark IV Amphibian">Mark IV Amphibian</a></li> <li><a href="/wiki/Porpoise_(scuba_gear)" title="Porpoise (scuba gear)">Porpoise</a></li> <li><a href="/wiki/Dr%C3%A4ger_Ray" class="mw-redirect" title="Dräger Ray">Ray</a></li> <li><a href="/wiki/Siebe_Gorman_CDBA" title="Siebe Gorman CDBA">Siebe Gorman CDBA</a></li> <li><a href="/wiki/Siebe_Gorman_Salvus" title="Siebe Gorman Salvus">Salvus</a></li> <li><a href="/wiki/Siva_(rebreather)" class="mw-redirect" title="Siva (rebreather)">Siva</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Surface-supplied_diving_equipment" title="Surface-supplied diving equipment">Surface-supplied<br />diving equipment</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Air_line" title="Air line">Air line</a></li> <li><a href="/wiki/Diver%27s_umbilical" class="mw-redirect" title="Diver's umbilical">Diver's umbilical</a></li> <li><a href="/wiki/Diving_air_compressor" title="Diving air compressor">Diving air compressor</a></li> <li><a href="/wiki/Gas_panel" class="mw-redirect" title="Gas panel">Gas panel</a></li> <li><a href="/wiki/Hookah_(diving)" class="mw-redirect" title="Hookah (diving)">Hookah</a></li> <li><a href="/wiki/Scuba_replacement" class="mw-redirect" title="Scuba replacement">Scuba replacement</a></li> <li><a href="/wiki/Snuba" title="Snuba">Snuba</a></li> <li><a href="/wiki/Standard_diving_dress" title="Standard diving dress">Standard diving dress</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/List_of_diving_equipment_manufacturers" title="List of diving equipment manufacturers"> Diving<br />equipment<br />manufacturers</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/AP_Diving" title="AP Diving">AP Diving</a></li> <li><a href="/wiki/Apeks" title="Apeks">Apeks</a></li> <li><a href="/wiki/Aqua_Lung_America" title="Aqua Lung America">Aqua Lung America</a></li> <li><a href="/wiki/Aqua_Lung/La_Spirotechnique" title="Aqua Lung/La Spirotechnique">Aqua Lung/La Spirotechnique</a></li> <li><a href="/wiki/Beuchat" title="Beuchat">Beuchat</a></li> <li><a href="/wiki/Ren%C3%A9_Cavalero" title="René Cavalero">René Cavalero</a></li> <li><a href="/wiki/Cis-Lunar" title="Cis-Lunar">Cis-Lunar</a></li> <li><a href="/wiki/Cressi-Sub" title="Cressi-Sub">Cressi-Sub</a></li> <li><a href="/wiki/Dacor_(scuba_diving)" title="Dacor (scuba diving)">Dacor</a></li> <li><a href="/wiki/DESCO" title="DESCO">DESCO</a></li> <li><a href="/wiki/Dive_Xtras" title="Dive Xtras">Dive Xtras</a></li> <li><a href="/wiki/Divex" title="Divex">Divex</a></li> <li><a href="/wiki/Diving_Unlimited_International" title="Diving Unlimited International">Diving Unlimited International</a></li> <li><a href="/wiki/Dr%C3%A4gerwerk" class="mw-redirect" title="Drägerwerk">Drägerwerk</a></li> <li><a href="/wiki/Faber_Industrie_S.p.A." title="Faber Industrie S.p.A.">Faber</a></li> <li><a href="/wiki/Fenzy" title="Fenzy">Fenzy</a></li> <li><a href="/wiki/Maurice_Fernez" title="Maurice Fernez">Maurice Fernez</a></li> <li><a href="/wiki/Luigi_Ferraro_(naval_officer)" class="mw-redirect" title="Luigi Ferraro (naval officer)">Technisub</a></li> <li><a href="/wiki/Oscar_Gugen" title="Oscar Gugen">Oscar Gugen</a></li> <li><a href="/wiki/Heinke_(diving_equipment_manufacturer)" title="Heinke (diving equipment manufacturer)">Heinke</a></li> <li><a href="/wiki/HeinrichsWeikamp" title="HeinrichsWeikamp">HeinrichsWeikamp</a></li> <li><a href="/wiki/Johnson_Outdoors" title="Johnson Outdoors">Johnson Outdoors</a></li> <li><a href="/wiki/Mares_(scuba_equipment)" title="Mares (scuba equipment)">Mares</a></li> <li><a href="/wiki/Morse_Diving" title="Morse Diving">Morse Diving</a></li> <li><a href="/wiki/Nemrod" title="Nemrod">Nemrod</a></li> <li><a href="/wiki/Oceanic_Worldwide" title="Oceanic Worldwide">Oceanic Worldwide</a></li> <li><a href="/wiki/Porpoise_(scuba_gear)" title="Porpoise (scuba gear)">Porpoise</a></li> <li><a href="/wiki/Shearwater_Research" title="Shearwater Research">Shearwater Research</a></li> <li><a href="/wiki/Siebe_Gorman" title="Siebe Gorman">Siebe Gorman</a></li> <li><a href="/wiki/Submarine_Products" title="Submarine Products">Submarine Products</a></li> <li><a href="/wiki/Suunto" title="Suunto">Suunto</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Diving_support_equipment" style="font-size:114%;margin:0 4em"><a href="/wiki/Diving_support_equipment" title="Diving support equipment">Diving support equipment</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Access equipment</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Boarding_stirrup" class="mw-redirect" title="Boarding stirrup">Boarding stirrup</a></li> <li><a href="/wiki/Diver_lift" class="mw-redirect" title="Diver lift">Diver lift</a></li> <li><a href="/wiki/Diving_bell" title="Diving bell">Diving bell</a></li> <li><a href="/wiki/Diving_ladder" class="mw-redirect" title="Diving ladder">Diving ladder</a></li> <li><a href="/wiki/Diving_platform_(scuba)" class="mw-redirect" title="Diving platform (scuba)">Diving platform (scuba)</a></li> <li><a href="/wiki/Diving_stage" class="mw-redirect" title="Diving stage">Diving stage</a></li> <li><a href="/wiki/Downline_(diving)" title="Downline (diving)">Downline</a></li> <li><a href="/wiki/Jackstay" title="Jackstay">Jackstay</a></li> <li><a href="/wiki/Launch_and_recovery_system_(diving)" class="mw-redirect" title="Launch and recovery system (diving)">Launch and recovery system</a></li> <li><a href="/wiki/Messenger_line" title="Messenger line">Messenger line</a></li> <li><a href="/wiki/Moon_pool" title="Moon pool">Moon pool</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Breathing gas<br />handling</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Diving_air_compressor#Filtration" title="Diving air compressor">Air filtration</a> <ul><li><a href="/wiki/Activated_carbon" title="Activated carbon">Activated carbon</a></li> <li><a href="/wiki/Hopcalite" title="Hopcalite">Hopcalite</a></li> <li><a href="/wiki/Molecular_sieve" title="Molecular sieve">Molecular sieve</a></li> <li><a href="/wiki/Silica_gel" title="Silica gel">Silica gel</a></li></ul></li> <li><a href="/wiki/Booster_pump" title="Booster pump">Booster pump</a></li> <li><a href="/wiki/Carbon_dioxide_scrubber" title="Carbon dioxide scrubber">Carbon dioxide scrubber</a></li> <li><a href="/wiki/Cascade_filling_system" title="Cascade filling system">Cascade filling system</a></li> <li><a href="/wiki/Diver%27s_pump" title="Diver's pump">Diver's pump</a></li> <li><a href="/wiki/Diving_air_compressor" title="Diving air compressor">Diving air compressor</a> <ul><li><a href="/wiki/Diving_air_filter" class="mw-redirect" title="Diving air filter">Diving air filter</a></li> <li><a href="/wiki/Water_separator" class="mw-redirect" title="Water separator">Water separator</a></li> <li><a href="/wiki/High_pressure_breathing_air_compressor" class="mw-redirect" title="High pressure breathing air compressor">High pressure breathing air compressor</a></li> <li><a href="/wiki/Low_pressure_breathing_air_compressor" class="mw-redirect" title="Low pressure breathing air compressor">Low pressure breathing air compressor</a></li></ul></li> <li><a href="/wiki/Gas_blending" title="Gas blending">Gas blending</a> <ul><li><a href="/wiki/Gas_blending_for_scuba_diving" title="Gas blending for scuba diving">Gas blending for scuba diving</a></li></ul></li> <li><a href="/wiki/Gas_panel" class="mw-redirect" title="Gas panel">Gas panel</a></li> <li><a href="/wiki/Gas_reclaim_system" class="mw-redirect" title="Gas reclaim system">Gas reclaim system</a></li> <li><a href="/wiki/Gas_storage_bank" class="mw-redirect" title="Gas storage bank">Gas storage bank</a> <ul><li><a href="/wiki/Gas_storage_quad" class="mw-redirect" title="Gas storage quad">Gas storage quad</a></li> <li><a href="/wiki/Gas_storage_tube" class="mw-redirect" title="Gas storage tube">Gas storage tube</a></li></ul></li> <li><a href="/wiki/Helium_analyzer" title="Helium analyzer">Helium analyzer</a></li> <li><a href="/wiki/Nitrox_production" class="mw-redirect" title="Nitrox production">Nitrox production</a> <ul><li><a href="/wiki/Membrane_gas_separation" title="Membrane gas separation">Membrane gas separation</a></li> <li><a href="/wiki/Pressure_swing_adsorption" title="Pressure swing adsorption">Pressure swing adsorption</a></li></ul></li> <li><a href="/wiki/Oxygen_analyser" class="mw-redirect" title="Oxygen analyser">Oxygen analyser</a> <ul><li><a href="/wiki/Electro-galvanic_oxygen_sensor" title="Electro-galvanic oxygen sensor">Electro-galvanic oxygen sensor</a></li></ul></li> <li><a href="/wiki/Oxygen_compatibility" title="Oxygen compatibility">Oxygen compatibility</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Decompression_equipment" title="Decompression equipment">Decompression<br />equipment</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Air-lock" class="mw-redirect" title="Air-lock">Air-lock</a></li> <li><a href="/wiki/Built-in_breathing_system" title="Built-in breathing system">Built-in breathing system</a></li> <li><a href="/wiki/Decompression_tables" class="mw-redirect" title="Decompression tables">Decompression tables</a></li> <li><a href="/wiki/Diving_bell" title="Diving bell">Diving bell</a> <ul><li><a href="/wiki/Bell_cursor" class="mw-redirect" title="Bell cursor">Bell cursor</a></li> <li><a href="/wiki/Closed_bell" class="mw-redirect" title="Closed bell">Closed bell</a></li> <li><a href="/wiki/Clump_weight" class="mw-redirect" title="Clump weight">Clump weight</a></li> <li><a href="/wiki/Launch_and_recovery_system_(diving)" class="mw-redirect" title="Launch and recovery system (diving)">Launch and recovery system</a></li> <li><a href="/wiki/Wet_bell" class="mw-redirect" title="Wet bell">Wet bell</a></li></ul></li> <li><a href="/wiki/Diving_chamber" title="Diving chamber">Diving chamber</a></li> <li><a href="/wiki/Diving_stage" class="mw-redirect" title="Diving stage">Diving stage</a></li> <li><a href="/wiki/Recreational_Dive_Planner" title="Recreational Dive Planner">Recreational Dive Planner</a></li> <li><a href="/wiki/Saturation_system" class="mw-redirect" title="Saturation system">Saturation system</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Platforms</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Dive_boat" title="Dive boat">Dive boat</a> <ul><li><a href="/wiki/Canoe_and_kayak_diving" title="Canoe and kayak diving">Canoe and kayak diving</a></li> <li><a href="/wiki/Combat_rubber_raiding_craft" title="Combat rubber raiding craft">Combat rubber raiding craft</a></li> <li><a href="/wiki/Liveaboard" title="Liveaboard">Liveaboard</a></li> <li><a href="/wiki/Subskimmer" title="Subskimmer">Subskimmer</a></li></ul></li> <li><a href="/wiki/Diving_support_vessel" title="Diving support vessel">Diving support vessel</a> <ul><li><a href="/wiki/HMS_Challenger_(K07)" title="HMS Challenger (K07)">HMS Challenger (K07)</a></li></ul></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Underwaterhabitat" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Underwater_habitat" title="Underwater habitat">Underwater<br />habitat</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aquarius_Reef_Base" title="Aquarius Reef Base">Aquarius Reef Base</a></li> <li><a href="/wiki/Continental_Shelf_Station_Two" title="Continental Shelf Station Two">Continental Shelf Station Two</a></li> <li><a href="/wiki/Helgoland_Habitat" title="Helgoland Habitat">Helgoland Habitat</a></li> <li><a href="/wiki/Scott_Carpenter_Space_Analog_Station" title="Scott Carpenter Space Analog Station">Scott Carpenter Space Analog Station</a></li> <li><a href="/wiki/SEALAB" title="SEALAB">SEALAB</a></li> <li><a href="/wiki/Tektite_habitat" title="Tektite habitat">Tektite habitat</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Remotely_operated_underwater_vehicle" title="Remotely operated underwater vehicle">Remotely operated<br />underwater vehicles</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/8A4-class_ROUV" title="8A4-class ROUV">8A4-class ROUV</a></li> <li><a href="/wiki/ABISMO" title="ABISMO">ABISMO</a></li> <li><a href="/wiki/Atlantis_ROV_Team" title="Atlantis ROV Team">Atlantis ROV Team</a></li> <li><a href="/wiki/COTSBot" title="COTSBot">COTSBot</a></li> <li><a href="/wiki/CURV" title="CURV">CURV</a></li> <li><a href="/wiki/Deep_Drone" title="Deep Drone">Deep Drone</a></li> <li><a href="/wiki/%C3%89paulard" title="Épaulard">Épaulard</a></li> <li><a href="/wiki/Global_Explorer_ROV" title="Global Explorer ROV">Global Explorer ROV</a></li> <li><a href="/wiki/Goldfish-class_ROUV" title="Goldfish-class ROUV">Goldfish-class ROUV</a></li> <li><a href="/wiki/Kaik%C5%8D_ROV" title="Kaikō ROV">Kaikō ROV</a></li> <li><a href="/wiki/Ka%C5%9Fif_ROUV" title="Kaşif ROUV">Kaşif ROUV</a></li> <li><a href="/wiki/Long-Term_Mine_Reconnaissance_System" title="Long-Term Mine Reconnaissance System">Long-Term Mine Reconnaissance System</a></li> <li><a href="/wiki/Mini_Rover_ROV" title="Mini Rover ROV">Mini Rover ROV</a></li> <li><a href="/wiki/OpenROV" title="OpenROV">OpenROV</a></li> <li><a href="/wiki/ROV_KIEL_6000" title="ROV KIEL 6000">ROV KIEL 6000</a></li> <li><a href="/wiki/ROV_PHOCA" title="ROV PHOCA">ROV PHOCA</a></li> <li><a href="/wiki/Scorpio_ROV" title="Scorpio ROV">Scorpio ROV</a></li> <li><a href="/wiki/Sea_Dragon-class_ROV" title="Sea Dragon-class ROV">Sea Dragon-class ROV</a></li> <li><a href="/wiki/Seabed_tractor" title="Seabed tractor">Seabed tractor</a></li> <li><a href="/wiki/Seafox_drone" title="Seafox drone">Seafox drone</a></li> <li><a href="/wiki/SeaPerch" title="SeaPerch">SeaPerch</a></li> <li><a href="/wiki/SJT-class_ROUV" title="SJT-class ROUV">SJT-class ROUV</a></li> <li><a href="/wiki/T1200_Trenching_Unit" title="T1200 Trenching Unit">T1200 Trenching Unit</a></li> <li><a href="/wiki/VideoRay_UROVs" title="VideoRay UROVs">VideoRay UROVs</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Safety equipment</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Diver_down_flag" title="Diver down flag">Diver down flag</a></li> <li><a href="/wiki/Diving_shot" title="Diving shot">Diving shot</a></li> <li><a href="/wiki/ENOS_Rescue-System" title="ENOS Rescue-System">ENOS Rescue-System</a></li> <li><a href="/wiki/Hyperbaric_lifeboat" class="mw-redirect" title="Hyperbaric lifeboat">Hyperbaric lifeboat</a></li> <li><a href="/wiki/Hyperbaric_stretcher" title="Hyperbaric stretcher">Hyperbaric stretcher</a></li> <li><a href="/wiki/Jackstay_(diving)" class="mw-redirect" title="Jackstay (diving)">Jackstay</a></li> <li><a href="/wiki/Jonline" class="mw-redirect" title="Jonline">Jonline</a></li> <li><a href="/wiki/Reserve_gas_supply_(diving)" class="mw-redirect" title="Reserve gas supply (diving)">Reserve gas supply</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">General</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Diving_spread" class="mw-redirect" title="Diving spread">Diving spread</a> <ul><li><a href="/wiki/Air_spread" class="mw-redirect" title="Air spread">Air spread</a></li> <li><a href="/wiki/Saturation_spread" class="mw-redirect" title="Saturation spread">Saturation spread</a></li></ul></li> <li><a href="/wiki/Hot_water_system_(diving)" class="mw-redirect" title="Hot water system (diving)">Hot water system</a></li> <li><a href="/wiki/Sonar" title="Sonar">Sonar</a> <ul><li><a href="/wiki/Underwater_acoustic_positioning_system" title="Underwater acoustic positioning system">Underwater acoustic positioning system</a></li> <li><a href="/wiki/Underwater_acoustic_communication" title="Underwater acoustic communication">Underwater acoustic communication</a></li></ul></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Freediving" style="font-size:114%;margin:0 4em"><a href="/wiki/Freediving" title="Freediving">Freediving</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Activities</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aquathlon_(underwater_wrestling)" title="Aquathlon (underwater wrestling)">Aquathlon</a></li> <li><a href="/wiki/Apnoea_finswimming" class="mw-redirect" title="Apnoea finswimming">Apnoea finswimming</a></li> <li><a href="/wiki/Freediving" title="Freediving">Freediving</a></li> <li><a href="/wiki/Haenyeo" title="Haenyeo">Haenyeo</a></li> <li><a href="/wiki/Pearl_hunting" title="Pearl hunting">Pearl hunting</a> <ul><li><a href="/wiki/Ama_(diving)" title="Ama (diving)">Ama</a></li></ul></li> <li><a href="/wiki/Snorkeling" title="Snorkeling">Snorkeling</a></li> <li><a href="/wiki/Spearfishing" title="Spearfishing">Spearfishing</a></li> <li><a href="/wiki/Underwater_football" title="Underwater football">Underwater football</a></li> <li><a href="/wiki/Underwater_hockey" title="Underwater hockey">Underwater hockey</a></li> <li><a href="/wiki/Underwater_rugby" title="Underwater rugby">Underwater rugby</a></li> <li><a href="/wiki/Underwater_target_shooting" title="Underwater target shooting">Underwater target shooting</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Competitions</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Nordic_Deep" title="Nordic Deep">Nordic Deep</a></li> <li><a href="/wiki/Vertical_Blue" title="Vertical Blue">Vertical Blue</a></li> <li>Disciplines <ul><li><a href="/wiki/Constant_weight" class="mw-redirect" title="Constant weight">Constant weight</a> (CWT)</li> <li><a href="/wiki/Constant_weight_bi-fins" title="Constant weight bi-fins">Constant weight bi-fins</a> (CWTB)</li> <li><a href="/wiki/Constant_weight_without_fins" title="Constant weight without fins">Constant weight without fins</a> (CNF)</li> <li><a href="/wiki/Dynamic_apnea" title="Dynamic apnea">Dynamic apnea</a> (DYN)</li> <li><a href="/wiki/Dynamic_apnea_without_fins" class="mw-redirect" title="Dynamic apnea without fins">Dynamic apnea without fins</a> (DNF)</li> <li><a href="/wiki/Free_immersion" class="mw-redirect" title="Free immersion">Free immersion</a> (FIM)</li> <li><a href="/wiki/No-limits_apnea" title="No-limits apnea">No-limits apnea</a> (NLT)</li> <li><a href="/wiki/Static_apnea" title="Static apnea">Static apnea</a> (STA)</li> <li><a href="/wiki/Skandalopetra_diving" title="Skandalopetra diving">Skandalopetra diving</a></li> <li><a href="/wiki/Variable_weight_apnea" class="mw-redirect" title="Variable weight apnea">Variable weight apnea</a> (VWT)</li> <li><a href="/wiki/Variable_weight_apnea_without_fins" class="mw-redirect" title="Variable weight apnea without fins">Variable weight apnea without fins</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Equipment</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Diving_mask" title="Diving mask">Diving mask</a></li> <li><a href="/wiki/Diving_suit" title="Diving suit">Diving suit</a></li> <li><a href="/wiki/Hawaiian_sling" title="Hawaiian sling">Hawaiian sling</a></li> <li><a href="/wiki/Polespear" title="Polespear">Polespear</a></li> <li><a href="/wiki/Snorkel_(swimming)" title="Snorkel (swimming)">Snorkel (swimming)</a></li> <li><a href="/wiki/Speargun" title="Speargun">Speargun</a></li> <li><a href="/wiki/Swimfin" title="Swimfin">Swimfins</a> <ul><li><a href="/wiki/Monofin" title="Monofin">Monofin</a></li></ul></li> <li><a href="/wiki/Water_polo_cap" title="Water polo cap">Water polo cap</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Freedivers</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Deborah_Andollo" title="Deborah Andollo">Deborah Andollo</a></li> <li><a href="/wiki/Simone_Arrigoni" title="Simone Arrigoni">Simone Arrigoni</a></li> <li><a href="/wiki/Peppo_Biscarini" title="Peppo Biscarini">Peppo Biscarini</a></li> <li><a href="/wiki/Michael_Board" title="Michael Board">Michael Board</a></li> <li><a href="/wiki/Sara_Campbell" title="Sara Campbell">Sara Campbell</a></li> <li><a href="/wiki/Derya_Can_G%C3%B6%C3%A7en" class="mw-redirect" title="Derya Can Göçen">Derya Can Göçen</a></li> <li><a href="/wiki/Goran_%C4%8Colak" title="Goran Čolak">Goran Čolak</a></li> <li><a href="/wiki/Carlos_Coste" title="Carlos Coste">Carlos Coste</a></li> <li><a href="/wiki/Robert_Croft_(diver)" title="Robert Croft (diver)">Robert Croft</a></li> <li><a href="/wiki/Mandy-Rae_Cruickshank" title="Mandy-Rae Cruickshank">Mandy-Rae Cruickshank</a></li> <li><a href="/wiki/Yasemin_Dalk%C4%B1l%C4%B1%C3%A7" title="Yasemin Dalkılıç">Yasemin Dalkılıç</a></li> <li><a href="/wiki/Leonardo_D%27Imporzano" title="Leonardo D'Imporzano">Leonardo D'Imporzano</a></li> <li><a href="/wiki/Flavia_Eberhard" title="Flavia Eberhard">Flavia Eberhard</a></li> <li><a href="/wiki/%C5%9Eahika_Erc%C3%BCmen" title="Şahika Ercümen">Şahika Ercümen</a></li> <li><a href="/wiki/Emma_Farrell_(freediver)" title="Emma Farrell (freediver)">Emma Farrell</a></li> <li><a href="/wiki/Francisco_Ferreras" title="Francisco Ferreras">Francisco Ferreras</a></li> <li><a href="/wiki/Pierre_Frolla" title="Pierre Frolla">Pierre Frolla</a></li> <li><a href="/wiki/Flavia_Eberhard" title="Flavia Eberhard">Flavia Eberhard</a></li> <li><a href="/wiki/Mehgan_Heaney-Grier" title="Mehgan Heaney-Grier">Mehgan Heaney-Grier</a></li> <li><a href="/wiki/Elisabeth_Kristoffersen" title="Elisabeth Kristoffersen">Elisabeth Kristoffersen</a></li> <li><a href="/wiki/Andriy_Yevhenovych_Khvetkevych" class="mw-redirect" title="Andriy Yevhenovych Khvetkevych">Andriy Yevhenovych Khvetkevych</a></li> <li><a href="/wiki/Lo%C3%AFc_Leferme" title="Loïc Leferme">Loïc Leferme</a></li> <li><a href="/wiki/Enzo_Maiorca" title="Enzo Maiorca">Enzo Maiorca</a></li> <li><a href="/wiki/Jacques_Mayol" title="Jacques Mayol">Jacques Mayol</a></li> <li><a href="/wiki/Audrey_Mestre" title="Audrey Mestre">Audrey Mestre</a></li> <li><a href="/wiki/Karol_Meyer" title="Karol Meyer">Karol Meyer</a></li> <li><a href="/wiki/Kate_Middleton_(free-diver)" title="Kate Middleton (free-diver)">Kate Middleton</a></li> <li><a href="/wiki/St%C3%A9phane_Mifsud" title="Stéphane Mifsud">Stéphane Mifsud</a></li> <li><a href="/wiki/Alexey_Molchanov" title="Alexey Molchanov">Alexey Molchanov</a></li> <li><a href="/wiki/Natalia_Molchanova" title="Natalia Molchanova">Natalia Molchanova</a></li> <li><a href="/wiki/Dave_Mullins_(freediver)" title="Dave Mullins (freediver)">Dave Mullins</a></li> <li><a href="/wiki/Patrick_Musimu" title="Patrick Musimu">Patrick Musimu</a></li> <li><a href="/wiki/Guillaume_N%C3%A9ry" title="Guillaume Néry">Guillaume Néry</a></li> <li><a href="/wiki/Herbert_Nitsch" title="Herbert Nitsch">Herbert Nitsch</a></li> <li><a href="/wiki/Umberto_Pelizzari" title="Umberto Pelizzari">Umberto Pelizzari</a></li> <li><a href="/wiki/Liv_Philip" title="Liv Philip">Liv Philip</a></li> <li><a href="/wiki/Annelie_Pompe" title="Annelie Pompe">Annelie Pompe</a></li> <li><a href="/wiki/Stig_Severinsen" title="Stig Severinsen">Stig Severinsen</a></li> <li><a href="/wiki/Tom_Sietas" title="Tom Sietas">Tom Sietas</a></li> <li><a href="/wiki/Aharon_Solomons" title="Aharon Solomons">Aharon Solomons</a></li> <li><a href="/wiki/Martin_%C5%A0t%C4%9Bp%C3%A1nek_(free-diver)" class="mw-redirect" title="Martin Štěpánek (free-diver)">Martin Štěpánek</a></li> <li><a href="/wiki/Walter_Steyn" title="Walter Steyn">Walter Steyn</a></li> <li><a href="/wiki/Tanya_Streeter" title="Tanya Streeter">Tanya Streeter</a></li> <li><a href="/wiki/William_Trubridge" title="William Trubridge">William Trubridge</a></li> <li><a href="/wiki/Devrim_Cenk_Ulusoy" title="Devrim Cenk Ulusoy">Devrim Cenk Ulusoy</a></li> <li><a href="/wiki/Fatma_Uruk" title="Fatma Uruk">Fatma Uruk</a></li> <li><a href="/wiki/Danai_Varveri" title="Danai Varveri">Danai Varveri</a></li> <li><a href="/wiki/Alessia_Zecchini" title="Alessia Zecchini">Alessia Zecchini</a></li> <li><a href="/wiki/Nataliia_Zharkova" title="Nataliia Zharkova">Nataliia Zharkova</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Hazards</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Barotrauma" title="Barotrauma">Barotrauma</a></li> <li><a href="/wiki/Drowning" title="Drowning">Drowning</a></li> <li><a href="/wiki/Freediving_blackout" title="Freediving blackout">Freediving blackout</a> <ul><li><a href="/wiki/Deep-water_blackout" class="mw-redirect" title="Deep-water blackout">Deep-water blackout</a></li> <li><a href="/wiki/Freediving_blackout#Terminology" title="Freediving blackout">Shallow-water blackout</a></li></ul></li> <li><a href="/wiki/Hypercapnia" title="Hypercapnia">Hypercapnia</a></li> <li><a href="/wiki/Hypothermia" title="Hypothermia">Hypothermia</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Historical</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ama_(diving)" title="Ama (diving)">Ama</a></li> <li><a href="/wiki/Octopus_wrestling" title="Octopus wrestling">Octopus wrestling</a></li> <li><a href="/wiki/Swimming_at_the_1900_Summer_Olympics_%E2%80%93_Men%27s_underwater_swimming" title="Swimming at the 1900 Summer Olympics – Men's underwater swimming">Swimming at the 1900 Summer Olympics – Men's underwater swimming</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Organisations</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/AIDA_International" title="AIDA International">AIDA International</a></li> <li><a href="/wiki/Scuba_Schools_International" title="Scuba Schools International">Scuba Schools International</a></li> <li><a href="/wiki/Australian_Underwater_Federation" title="Australian Underwater Federation">Australian Underwater Federation</a></li> <li><a href="/wiki/British_Freediving_Association" title="British Freediving Association">British Freediving Association</a></li> <li><a href="/wiki/Conf%C3%A9d%C3%A9ration_Mondiale_des_Activit%C3%A9s_Subaquatiques" title="Confédération Mondiale des Activités Subaquatiques">Confédération Mondiale des Activités Subaquatiques</a></li> <li><a href="/wiki/F%C3%A9d%C3%A9ration_Fran%C3%A7aise_d%27%C3%89tudes_et_de_Sports_Sous-Marins" title="Fédération Française d'Études et de Sports Sous-Marins">Fédération Française d'Études et de Sports Sous-Marins</a></li> <li><a href="/wiki/Performance_Freediving_International" title="Performance Freediving International">Performance Freediving International</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Professional_diving" style="font-size:114%;margin:0 4em"><a href="/wiki/Professional_diving" title="Professional diving">Professional diving</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Occupations</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ama_(diving)" title="Ama (diving)">Ama</a></li> <li><a href="/wiki/Commercial_diver" class="mw-redirect" title="Commercial diver">Commercial diver</a> <ul><li><a href="/wiki/Commercial_offshore_diver" class="mw-redirect" title="Commercial offshore diver">Commercial offshore diver</a></li> <li><a href="/wiki/Hazmat_diver" class="mw-redirect" title="Hazmat diver">Hazmat diver</a></li></ul></li> <li><a href="/wiki/Divemaster" title="Divemaster">Divemaster</a></li> <li><a href="/wiki/Diving_instructor" title="Diving instructor">Diving instructor</a></li> <li><a href="/wiki/Diving_safety_officer" title="Diving safety officer">Diving safety officer</a></li> <li><a href="/wiki/Diving_superintendent" class="mw-redirect" title="Diving superintendent">Diving superintendent</a></li> <li><a href="/wiki/Diving_supervisor" title="Diving supervisor">Diving supervisor</a></li> <li><a href="/wiki/Haenyeo" title="Haenyeo">Haenyeo</a></li> <li><a href="/wiki/Media_diver" class="mw-redirect" title="Media diver">Media diver</a></li> <li><a href="/wiki/Police_diver" class="mw-redirect" title="Police diver">Police diver</a></li> <li><a href="/wiki/Public_safety_diver" class="mw-redirect" title="Public safety diver">Public safety diver</a></li> <li><a href="/wiki/Scientific_diver" class="mw-redirect" title="Scientific diver">Scientific diver</a></li> <li><a href="/wiki/Underwater_archaeologist" class="mw-redirect" title="Underwater archaeologist">Underwater archaeologist</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Militarydiving" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Military_diving" title="Military diving">Military<br />diving</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Army_engineer_diver" title="Army engineer diver">Army engineer diver</a></li> <li><a href="/wiki/Canadian_Armed_Forces_Divers" title="Canadian Armed Forces Divers">Canadian Armed Forces Divers</a></li> <li><a href="/wiki/Clearance_diver" title="Clearance diver">Clearance diver</a></li> <li><a href="/wiki/Frogman" title="Frogman">Frogman</a></li> <li><a href="/wiki/Minentaucher" title="Minentaucher">Minentaucher</a></li> <li><a href="/wiki/Royal_Navy_ships_diver" title="Royal Navy ships diver">Royal Navy ships diver</a></li> <li><a href="/wiki/United_States_military_divers" title="United States military divers">United States military divers</a> <ul><li><a href="/wiki/Navy_diver_(United_States_Navy)" title="Navy diver (United States Navy)">U.S. Navy diver</a></li> <li><a href="/wiki/Master_diver_(United_States_Navy)" title="Master diver (United States Navy)">U.S.Navy master diver</a></li></ul></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Militarydivingunits" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/List_of_military_diving_units" title="List of military diving units">Military<br />diving<br />units</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Clearance_Diving_Branch_(RAN)" title="Clearance Diving Branch (RAN)">Clearance Diving Branch (RAN)</a></li> <li><a href="/wiki/Commando_Hubert" class="mw-redirect" title="Commando Hubert">Commando Hubert</a></li> <li><a href="/wiki/Lithuanian_Special_Operations_Force" title="Lithuanian Special Operations Force">Combat Divers Service (Lithuania)</a></li> <li><a href="/wiki/Comando_Raggruppamento_Subacquei_e_Incursori_Teseo_Tesei" title="Comando Raggruppamento Subacquei e Incursori Teseo Tesei">Comando Raggruppamento Subacquei e Incursori Teseo Tesei</a></li> <li><a href="/wiki/Decima_Flottiglia_MAS" title="Decima Flottiglia MAS">Decima Flottiglia MAS</a></li> <li><a href="/wiki/Frogman_Corps_(Denmark)" title="Frogman Corps (Denmark)">Frogman Corps (Denmark)</a></li> <li><a href="/wiki/Fuerzas_Especiales" title="Fuerzas Especiales">Fuerzas Especiales</a></li> <li><a href="/wiki/Fukuryu" title="Fukuryu">Fukuryu</a></li> <li><a href="/wiki/GRUMEC" title="GRUMEC">GRUMEC</a></li> <li><a href="/wiki/Grup_Gerak_Khas" class="mw-redirect" title="Grup Gerak Khas">Grup Gerak Khas</a></li> <li><a href="/wiki/Jagdkommando" title="Jagdkommando">Jagdkommando</a></li> <li><a href="/wiki/JW_Formoza" class="mw-redirect" title="JW Formoza">JW Formoza</a></li> <li><a href="/wiki/JW_GROM" class="mw-redirect" title="JW GROM">JW GROM</a></li> <li><a href="/wiki/JW_Komandos%C3%B3w" class="mw-redirect" title="JW Komandosów">JW Komandosów</a></li> <li><a href="/wiki/Kommando_Spezialkr%C3%A4fte_Marine" title="Kommando Spezialkräfte Marine">Kommando Spezialkräfte Marine</a></li> <li><a href="/wiki/KOPASKA" title="KOPASKA">KOPASKA</a></li> <li><a href="/wiki/MARCOS" title="MARCOS">MARCOS</a></li> <li><a href="/wiki/Marine_Commandos" title="Marine Commandos">Marine Commandos</a></li> <li><a href="/wiki/Marinejegerkommandoen" title="Marinejegerkommandoen">Marinejegerkommandoen</a></li> <li><a href="/wiki/Marine_Raider_Regiment" title="Marine Raider Regiment">Marine Raider Regiment</a></li> <li><a href="/wiki/Minedykkerkommandoen" title="Minedykkerkommandoen">Minedykkerkommandoen</a></li> <li><a href="/wiki/Namibian_Marine_Corps#Operational_Diving_Unit" title="Namibian Marine Corps">Namibian Marine Corps Operational Diving Unit</a></li> <li><a href="/wiki/Naval_Diving_Unit_(Singapore)" title="Naval Diving Unit (Singapore)">Naval Diving Unit (Singapore)</a></li> <li><a href="/wiki/Naval_Service_Diving_Section" title="Naval Service Diving Section">Naval Service Diving Section</a></li> <li><a href="/wiki/Naval_Special_Operations_Command" title="Naval Special Operations Command">Naval Special Operations Command</a></li> <li><a href="/wiki/Operational_Diving_Division_(SA_Navy)" title="Operational Diving Division (SA Navy)">Operational Diving Division (SA Navy)</a></li> <li><a href="/wiki/Royal_Engineers" title="Royal Engineers">Royal Engineers</a></li> <li><a href="/wiki/Russian_commando_frogmen" title="Russian commando frogmen">Russian commando frogmen</a></li> <li><a href="/wiki/Sappers_Divers_Group" title="Sappers Divers Group">Sappers Divers Group</a></li> <li><a href="/wiki/Shayetet_13" title="Shayetet 13">Shayetet 13</a></li> <li><a href="/wiki/Special_Air_Service" title="Special Air Service">Special Air Service</a></li> <li><a href="/wiki/Special_Air_Service_Regiment" title="Special Air Service Regiment">Special Air Service Regiment</a></li> <li><a href="/wiki/Special_Actions_Detachment" title="Special Actions Detachment">Special Actions Detachment</a></li> <li><a href="/wiki/Special_Boat_Service" title="Special Boat Service">Special Boat Service</a></li> <li><a href="/wiki/Special_Boat_Squadron_(Sri_Lanka)" title="Special Boat Squadron (Sri Lanka)">Special Boat Squadron (Sri Lanka)</a></li> <li><a href="/wiki/Special_Forces_Command_(Turkey)" title="Special Forces Command (Turkey)">Special Forces Command (Turkey)</a></li> <li><a href="/wiki/Special_Forces_Group_(Belgium)" title="Special Forces Group (Belgium)">Special Forces Group (Belgium)</a></li> <li><a href="/wiki/Special_Operations_Battalion_(Croatia)" title="Special Operations Battalion (Croatia)">Special Operations Battalion (Croatia)</a></li> <li><a href="/wiki/Special_Service_Group_(Navy)" title="Special Service Group (Navy)">Special Service Group (Navy)</a></li> <li><a href="/wiki/Special_Warfare_Diving_and_Salvage" title="Special Warfare Diving and Salvage">Special Warfare Diving and Salvage</a></li> <li><a href="/wiki/Tactical_Divers_Group" title="Tactical Divers Group">Tactical Divers Group</a></li> <li><a href="/wiki/United_States_Marine_Corps_Force_Reconnaissance" title="United States Marine Corps Force Reconnaissance">US Marine Corps Force Reconnaissance</a></li> <li><a href="/wiki/United_States_Marine_Corps_Reconnaissance_Battalions" title="United States Marine Corps Reconnaissance Battalions">US Marine Corps Reconnaissance Battalions</a></li> <li><a href="/wiki/United_States_Navy_SEALs" title="United States Navy SEALs">US Navy SEALs</a></li> <li><a href="/wiki/Underwater_Construction_Teams" title="Underwater Construction Teams">Underwater Construction Teams</a></li> <li><a href="/wiki/Underwater_Demolition_Command" title="Underwater Demolition Command">Underwater Demolition Command</a></li> <li><a href="/wiki/Underwater_Demolition_Team" title="Underwater Demolition Team">Underwater Demolition Team</a></li> <li><a href="/wiki/Underwater_Offence_(Turkish_Armed_Forces)" title="Underwater Offence (Turkish Armed Forces)">Underwater Offence (Turkish Armed Forces)</a></li> <li><a href="/wiki/UNGERIN" title="UNGERIN">UNGERIN</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr></tbody></table><div> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Underwater_work" title="Underwater work">Underwater<br />work</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Commercial_offshore_diving" title="Commercial offshore diving">Commercial offshore diving</a></li> <li><a href="/wiki/Dive_leader" title="Dive leader">Dive leader</a></li> <li><a href="/wiki/Diver_training" title="Diver training">Diver training</a> <ul><li><a href="/wiki/Recreational_diver_training" title="Recreational diver training">Recreational diver training</a></li></ul></li> <li><a href="/wiki/Hazmat_diving" title="Hazmat diving">Hazmat diving</a></li> <li><a href="/wiki/Hyperbaric_welding" title="Hyperbaric welding">Hyperbaric welding</a></li> <li><a href="/wiki/Marine_construction" title="Marine construction">Marine construction</a> <ul><li><a href="/wiki/Offshore_construction" title="Offshore construction">Offshore construction</a></li> <li><a href="/wiki/Underwater_construction" title="Underwater construction">Underwater construction</a></li></ul></li> <li><a href="/wiki/Media_diving" title="Media diving">Media diving</a></li> <li><a href="/wiki/Pearl_hunting" title="Pearl hunting">Pearl hunting</a></li> <li><a href="/wiki/Police_diving" title="Police diving">Police diving</a></li> <li><a href="/wiki/Potable_water_diving" title="Potable water diving">Potable water diving</a></li> <li><a href="/wiki/Public_safety_diving" title="Public safety diving">Public safety diving</a></li> <li><a href="/wiki/Scientific_diving" title="Scientific diving">Scientific diving</a></li> <li><a href="/wiki/Ships_husbandry" title="Ships husbandry">Ships husbandry</a></li> <li><a href="/wiki/Sponge_diving" title="Sponge diving">Sponge diving</a></li> <li><a href="/wiki/Submarine_pipeline" title="Submarine pipeline">Submarine pipeline</a></li> <li><a href="/wiki/Underwater_archaeology" title="Underwater archaeology">Underwater archaeology</a> <ul><li><a href="/wiki/Archaeology_of_shipwrecks" title="Archaeology of shipwrecks">Archaeology of shipwrecks</a></li></ul></li> <li><a href="/wiki/Underwater_cutting_and_welding" title="Underwater cutting and welding">Underwater cutting and welding</a></li> <li><a href="/wiki/Underwater_demolition" title="Underwater demolition">Underwater demolition</a></li> <li><a href="/wiki/Underwater_inspection" class="mw-redirect" title="Underwater inspection">Underwater inspection</a> <ul><li><a href="/wiki/Nondestructive_testing" title="Nondestructive testing">Nondestructive testing</a></li></ul></li> <li><a href="/wiki/Underwater_logging" title="Underwater logging">Underwater logging</a></li> <li><a href="/wiki/Underwater_photography" title="Underwater photography">Underwater photography</a></li> <li><a href="/wiki/Underwater_search_and_recovery" title="Underwater search and recovery">Underwater search and recovery</a> <ul><li><a href="/wiki/Underwater_searches" title="Underwater searches">Underwater searches</a></li></ul></li> <li><a href="/wiki/Underwater_videography" title="Underwater videography">Underwater videography</a></li> <li><a href="/wiki/Underwater_survey" title="Underwater survey">Underwater survey</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Salvage_diving" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Salvage_diving" title="Salvage diving">Salvage diving</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/SS_Egypt" title="SS Egypt">SS <i>Egypt</i></a></li> <li><a href="/wiki/Kronan_(ship)" title="Kronan (ship)"><i>Kronan</i></a></li> <li><a href="/wiki/La_Belle_(ship)" title="La Belle (ship)"><i>La Belle</i></a></li> <li><a href="/wiki/SS_Laurentic_(1908)" title="SS Laurentic (1908)">SS <i>Laurentic</i></a></li> <li><a href="/wiki/RMS_Lusitania" title="RMS Lusitania">RMS <i>Lusitania</i></a></li> <li><a href="/wiki/Swedish_warship_Mars" title="Swedish warship Mars"><i>Mars</i></a></li> <li><a href="/wiki/Mary_Rose" title="Mary Rose"><i>Mary Rose</i></a></li> <li><a href="/wiki/USS_Monitor" title="USS Monitor">USS <i>Monitor</i></a></li> <li><a href="/wiki/HMS_Royal_George_(1756)" title="HMS Royal George (1756)">HMS <i>Royal George</i></a></li> <li><a href="/wiki/Vasa_(ship)" title="Vasa (ship)"><i>Vasa</i></a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Diving_contractor" class="mw-redirect" title="Diving contractor">Diving<br />contractors</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Compagnie_maritime_d%27expertises" title="Compagnie maritime d'expertises">COMEX</a></li> <li><a href="/wiki/Helix_Energy_Solutions_Group" title="Helix Energy Solutions Group">Helix Energy Solutions Group</a></li> <li><a href="/wiki/International_Marine_Contractors_Association" title="International Marine Contractors Association">International Marine Contractors Association</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Tools and<br />equipment</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Abrasive_waterjet" class="mw-redirect" title="Abrasive waterjet">Abrasive waterjet</a></li> <li><a href="/wiki/Airlift_(dredging_device)" title="Airlift (dredging device)">Airlift</a></li> <li><a href="/wiki/Baited_remote_underwater_video" title="Baited remote underwater video">Baited remote underwater video</a></li> <li><a href="/wiki/In-water_surface_cleaning" title="In-water surface cleaning">In-water surface cleaning</a> <ul><li>Brush cart</li> <li><a href="/w/index.php?title=Cavitation_cleaning&action=edit&redlink=1" class="new" title="Cavitation cleaning (page does not exist)">Cavitation cleaning</a></li> <li><a href="/wiki/Pressure_washing" title="Pressure washing">Pressure washing</a></li> <li><a href="/wiki/Pigging" title="Pigging">Pigging</a></li></ul></li> <li><a href="/wiki/Hot_stab" title="Hot stab">Hot stab</a></li> <li><a href="/wiki/Lifting_bag" title="Lifting bag">Lifting bag</a></li> <li><a href="/wiki/Remotely_operated_underwater_vehicle" title="Remotely operated underwater vehicle">Remotely operated underwater vehicle</a></li> <li><a href="/wiki/Thermal_lance" title="Thermal lance">Thermal lance</a></li> <li><a href="/wiki/Tremie" title="Tremie">Tremie</a></li> <li><a href="/w/index.php?title=Water_jetting&action=edit&redlink=1" class="new" title="Water jetting (page does not exist)">Water jetting</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Underwater<br />weapons</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Limpet_mine" title="Limpet mine">Limpet mine</a></li> <li><a href="/wiki/Speargun" title="Speargun">Speargun</a> <ul><li><a href="/wiki/Hawaiian_sling" title="Hawaiian sling">Hawaiian sling</a></li> <li><a href="/wiki/Polespear" title="Polespear">Polespear</a></li></ul></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Underwaterfirearm" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Underwater_firearm" title="Underwater firearm">Underwater<br />firearm</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Gyrojet" title="Gyrojet">Gyrojet</a></li> <li><a href="/wiki/Mk_1_Underwater_Defense_Gun" title="Mk 1 Underwater Defense Gun">Mk 1 Underwater Defense Gun</a></li> <li><a href="/wiki/Powerhead_(firearm)" title="Powerhead (firearm)">Powerhead</a></li> <li>Underwater pistols <ul><li><a href="/wiki/Heckler_%26_Koch_P11" title="Heckler & Koch P11">Heckler & Koch P11</a></li> <li><a href="/wiki/SPP-1_underwater_pistol" title="SPP-1 underwater pistol">SPP-1 underwater pistol</a></li></ul></li> <li>Underwater revolvers <ul><li><a href="/wiki/AAI_underwater_revolver" title="AAI underwater revolver">AAI underwater revolver</a></li></ul></li> <li>Underwater rifles <ul><li><a href="/wiki/ADS_amphibious_rifle" title="ADS amphibious rifle">ADS amphibious rifle</a></li> <li><a href="/wiki/APS_underwater_rifle" title="APS underwater rifle">APS underwater rifle</a></li> <li><a href="/wiki/ASM-DT_amphibious_rifle" title="ASM-DT amphibious rifle">ASM-DT amphibious rifle</a></li> <li><a href="/wiki/QBS-06" title="QBS-06">QBS-06</a></li></ul></li></ul> </div></td></tr></tbody></table><div> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Recreational_diving" style="font-size:114%;margin:0 4em"><a href="/wiki/Recreational_diving" title="Recreational diving">Recreational diving</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Recreational_dive_sites" title="Recreational dive sites">Recreational dive sites</a></li> <li><a href="/wiki/Index_of_recreational_dive_sites" title="Index of recreational dive sites">Index of recreational dive sites</a></li> <li><a href="/wiki/List_of_wreck_diving_sites" title="List of wreck diving sites">List of wreck diving sites</a></li> <li><a href="/wiki/Outline_of_recreational_dive_sites" title="Outline of recreational dive sites">Outline of recreational dive sites</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Specialties</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Altitude_diving" title="Altitude diving">Altitude diving</a></li> <li><a href="/wiki/Cave_diving" title="Cave diving">Cave diving</a></li> <li><a href="/wiki/Deep_diving" title="Deep diving">Deep diving</a></li> <li><a href="/wiki/Ice_diving" title="Ice diving">Ice diving</a></li> <li><a href="/wiki/Muck_diving" title="Muck diving">Muck diving</a></li> <li><a href="/wiki/Open-water_diving" title="Open-water diving">Open-water diving</a></li> <li><a href="/wiki/Rebreather_diving" title="Rebreather diving">Rebreather diving</a></li> <li><a href="/wiki/Sidemount_diving" title="Sidemount diving">Sidemount diving</a></li> <li><a href="/wiki/Solo_diving" title="Solo diving">Solo diving</a></li> <li><a href="/wiki/Technical_diving" title="Technical diving">Technical diving</a></li> <li><a href="/wiki/Underwater_photography" title="Underwater photography">Underwater photography</a></li> <li><a href="/wiki/Wreck_diving" title="Wreck diving">Wreck diving</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Diver_organisations" title="Diver organisations">Diver<br />organisations</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/British_Sub-Aqua_Club" title="British Sub-Aqua Club">British Sub-Aqua Club</a> (BSAC)</li> <li><a href="/wiki/Cave_Divers_Association_of_Australia" title="Cave Divers Association of Australia">Cave Divers Association of Australia</a> (CDAA)</li> <li><a href="/wiki/Cave_Diving_Group" title="Cave Diving Group">Cave Diving Group</a> (CDG)</li> <li><a href="/wiki/Comhairle_Fo-Thuinn" title="Comhairle Fo-Thuinn">Comhairle Fo-Thuinn</a> (CFT)</li> <li><a href="/wiki/Conf%C3%A9d%C3%A9ration_Mondiale_des_Activit%C3%A9s_Subaquatiques" title="Confédération Mondiale des Activités Subaquatiques">Confédération Mondiale des Activités Subaquatiques</a> (CMAS)</li> <li><a href="/wiki/Federaci%C3%B3n_Espa%C3%B1ola_de_Actividades_Subacu%C3%A1ticas" title="Federación Española de Actividades Subacuáticas">Federación Española de Actividades Subacuáticas</a> (FEDAS)</li> <li><a href="/wiki/F%C3%A9d%C3%A9ration_Fran%C3%A7aise_d%27%C3%89tudes_et_de_Sports_Sous-Marins" title="Fédération Française d'Études et de Sports Sous-Marins">Fédération Française d'Études et de Sports Sous-Marins</a> (FFESSM)</li> <li><a href="/wiki/International_Association_for_Handicapped_Divers" title="International Association for Handicapped Divers">International Association for Handicapped Divers</a> (IAHD)</li> <li><a href="/wiki/Quintana_Roo_Speleological_Survey" title="Quintana Roo Speleological Survey">Quintana Roo Speleological Survey</a> (QRSS)</li> <li><a href="/wiki/Woodville_Karst_Plain_Project" title="Woodville Karst Plain Project">Woodville Karst Plain Project</a> (WKPP)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Diving tourism<br />industry</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Dive_center" title="Dive center">Dive center</a></li> <li><a href="/wiki/Diving_in_East_Timor" title="Diving in East Timor">Diving in East Timor</a></li> <li><a href="/wiki/Diving_in_the_Maldives" title="Diving in the Maldives">Diving in the Maldives</a></li> <li><a href="/wiki/Environmental_impact_of_recreational_diving" title="Environmental impact of recreational diving">Environmental impact of recreational diving</a></li> <li><a href="/wiki/Scuba_diving_tourism" title="Scuba diving tourism">Scuba diving tourism</a></li> <li><a href="/wiki/Scuba_diving_in_the_Cayman_Islands" title="Scuba diving in the Cayman Islands">Scuba diving in the Cayman Islands</a></li> <li><a href="/wiki/Shark_tourism" title="Shark tourism">Shark tourism</a></li> <li><a href="/wiki/Sinking_ships_for_wreck_diving_sites" title="Sinking ships for wreck diving sites">Sinking ships for wreck diving sites</a></li> <li><a href="/wiki/Underwater_diving_on_Guam" class="mw-redirect" title="Underwater diving on Guam">Underwater diving on Guam</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Diving events<br />and festivals</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Diversnight" title="Diversnight">Diversnight</a></li> <li><a href="/wiki/Underwater_Bike_Race" title="Underwater Bike Race">Underwater Bike Race</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Diving_safety" style="font-size:114%;margin:0 4em"><a href="/wiki/Diving_safety" title="Diving safety">Diving safety</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Human_factors_in_diving_equipment_design" title="Human factors in diving equipment design">Human factors in diving equipment design</a></li> <li><a href="/wiki/Human_factors_in_diving_safety" title="Human factors in diving safety">Human factors in diving safety</a></li> <li><a href="/wiki/Life-support_system" title="Life-support system">Life-support system</a></li> <li><a href="/wiki/Safety-critical_system" title="Safety-critical system">Safety-critical system</a></li> <li><a href="/wiki/Scuba_diving_fatalities" title="Scuba diving fatalities">Scuba diving fatalities</a></li> <li><a href="/wiki/Underwater_diving_emergency" title="Underwater diving emergency">Underwater diving emergency</a></li> <li><a href="/wiki/Water_safety" title="Water safety">Water safety</a></li> <li><a href="/wiki/Water_surface_searches" title="Water surface searches">Water surface searches</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Diving_hazards" title="Diving hazards">Diving<br />hazards</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_diving_hazards_and_precautions" title="List of diving hazards and precautions">List of diving hazards and precautions</a></li> <li><a href="/wiki/Hazards_of_the_diving_environment" class="mw-redirect" title="Hazards of the diving environment">Environmental</a> <ul><li><a href="/wiki/Ocean_current" title="Ocean current">Current</a></li> <li><a href="/wiki/Delta-P_(hazard)" class="mw-redirect" title="Delta-P (hazard)">Delta-P</a></li> <li><a href="/wiki/Entanglement_(hazard)" class="mw-redirect" title="Entanglement (hazard)">Entanglement hazard</a></li> <li><a href="/wiki/Penetration_diving" title="Penetration diving">Overhead</a></li> <li><a href="/wiki/Silt_out" title="Silt out">Silt out</a></li> <li><a href="/wiki/Wave_action" class="mw-redirect" title="Wave action">Wave action</a></li></ul></li> <li>Equipment <ul><li><a href="/wiki/Freeflow" title="Freeflow">Freeflow</a></li> <li><a href="/wiki/List_of_diving_hazards_and_precautions#Use_of_breathing_equipment_in_an_underwater_environment" title="List of diving hazards and precautions">Use of breathing equipment in an underwater environment</a></li> <li><a href="/wiki/List_of_diving_hazards_and_precautions#Failure_of_diving_equipment_other_than_breathing_apparatus" title="List of diving hazards and precautions">Failure of diving equipment other than breathing apparatus</a></li> <li><a href="/wiki/Single_point_of_failure" title="Single point of failure">Single point of failure</a></li></ul></li> <li>Physiological <ul><li><a href="/wiki/Cold_shock_response" title="Cold shock response">Cold shock response</a></li> <li><a href="/wiki/Decompression_(diving)" title="Decompression (diving)">Decompression</a></li> <li><a href="/wiki/Nitrogen_narcosis" title="Nitrogen narcosis">Nitrogen narcosis</a></li> <li><a href="/wiki/Oxygen_toxicity" title="Oxygen toxicity">Oxygen toxicity</a></li> <li><a href="/wiki/Seasickness" class="mw-redirect" title="Seasickness">Seasickness</a></li> <li><a href="/wiki/Uncontrolled_decompression" title="Uncontrolled decompression">Uncontrolled decompression</a></li></ul></li> <li><a href="/wiki/List_of_diving_hazards_and_precautions#Diver_behaviour_and_competence" title="List of diving hazards and precautions">Diver behaviour and competence</a> <ul><li>Lack of <a href="/wiki/Competence_(human_resources)" title="Competence (human resources)">competence</a></li> <li><a href="/wiki/Overconfidence_effect" title="Overconfidence effect">Overconfidence effect</a></li> <li><a href="/wiki/Panic" title="Panic">Panic</a></li> <li><a href="/wiki/Task_loading" title="Task loading">Task loading</a></li> <li><a href="/wiki/Anxiety#Trait" title="Anxiety">Trait anxiety</a></li> <li><a href="/wiki/Willful_violation" title="Willful violation">Willful violation</a></li></ul></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Consequences" scope="row" class="navbox-group" style="width:1%">Consequences</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Barotrauma" title="Barotrauma">Barotrauma</a></li> <li><a href="/wiki/Decompression_sickness" title="Decompression sickness">Decompression sickness</a></li> <li><a href="/wiki/Drowning" title="Drowning">Drowning</a></li> <li><a href="/wiki/Hypothermia" title="Hypothermia">Hypothermia</a></li> <li><a href="/wiki/Hypoxia_(medical)" class="mw-redirect" title="Hypoxia (medical)">Hypoxia</a></li> <li><a href="/wiki/Hypercapnia" title="Hypercapnia">Hypercapnia</a></li> <li><a href="/wiki/Hyperthermia" title="Hyperthermia">Hyperthermia</a></li> <li><a href="/wiki/Non-freezing_cold_injury" title="Non-freezing cold injury">Non-freezing cold injury</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Diving_procedures" title="Diving procedures">Diving<br />procedures</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ascending_and_descending_(diving)" title="Ascending and descending (diving)">Ascending and descending</a> <ul><li><a href="/wiki/Emergency_ascent" title="Emergency ascent">Emergency ascent</a></li></ul></li> <li><a href="/wiki/Boat_diving" class="mw-redirect" title="Boat diving">Boat diving</a> <ul><li><a href="/wiki/Canoe_and_kayak_diving" title="Canoe and kayak diving">Canoe and kayak diving</a></li></ul></li> <li><a href="/wiki/Buddy_diving" title="Buddy diving">Buddy diving</a> <ul><li><a href="/wiki/Buddy_check" title="Buddy check">buddy check</a></li></ul></li> <li><a href="/wiki/Decompression_(diving)" title="Decompression (diving)">Decompression</a> <ul><li><a href="/wiki/Decompression_practice" title="Decompression practice">Decompression practice</a></li> <li><a href="/wiki/Pyle_stop" title="Pyle stop">Pyle stop</a></li> <li><a href="/wiki/Ratio_decompression" title="Ratio decompression">Ratio decompression</a></li></ul></li> <li><a href="/wiki/Dive_briefing" title="Dive briefing">Dive briefing</a></li> <li><a href="/wiki/Dive_log" title="Dive log">Dive log</a></li> <li><a href="/wiki/Dive_planning" title="Dive planning">Dive planning</a> <ul><li><a href="/wiki/Rule_of_thirds_(diving)" title="Rule of thirds (diving)">Rule of thirds</a></li> <li><a href="/wiki/Scuba_gas_planning" title="Scuba gas planning">Scuba gas planning</a></li></ul></li> <li><a href="/wiki/Diver_communications" title="Diver communications">Diver communications</a></li> <li><a href="/wiki/Diver_rescue" title="Diver rescue">Diver rescue</a></li> <li><a href="/wiki/Diver_training" title="Diver training">Diver training</a></li> <li><a href="/wiki/Doing_It_Right_(scuba_diving)" title="Doing It Right (scuba diving)">Doing It Right</a></li> <li><a href="/wiki/Drift_diving" title="Drift diving">Drift diving</a></li> <li><a href="/wiki/Gas_blending_for_scuba_diving" title="Gas blending for scuba diving">Gas blending for scuba diving</a></li> <li><a href="/wiki/Night_diving" title="Night diving">Night diving</a></li> <li><a href="/wiki/Rebreather_diving" title="Rebreather diving">Rebreather diving</a></li> <li><a href="/wiki/Scuba_gas_management" title="Scuba gas management">Scuba gas management</a></li> <li><a href="/wiki/Solo_diving" title="Solo diving">Solo diving</a></li> <li><a href="/wiki/Wall_diving" title="Wall diving">Wall diving</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Risk_management" title="Risk management">Risk<br />management</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Checklist" title="Checklist">Checklist</a></li> <li>Hazard identification and risk assessment <ul><li><a href="/wiki/Hazard_analysis" title="Hazard analysis">Hazard analysis</a></li> <li><a href="/wiki/Job_safety_analysis" title="Job safety analysis">Job safety analysis</a></li> <li><a href="/wiki/Risk_assessment" title="Risk assessment">Risk assessment</a></li></ul></li> <li><a href="/wiki/Hyperbaric_evacuation_and_rescue" title="Hyperbaric evacuation and rescue">Hyperbaric evacuation and rescue</a></li> <li><a href="/wiki/Risk_control" title="Risk control">Risk control</a> <ul><li><a href="/wiki/Hierarchy_of_hazard_controls" title="Hierarchy of hazard controls">Hierarchy of hazard controls</a></li></ul></li> <li><a href="/wiki/Incident_pit" title="Incident pit">Incident pit</a></li> <li><a href="/wiki/Lockout%E2%80%93tagout" title="Lockout–tagout">Lockout–tagout</a></li> <li><a href="/wiki/Permit_To_Work" class="mw-redirect" title="Permit To Work">Permit To Work</a></li> <li><a href="/wiki/Redundancy_(engineering)" title="Redundancy (engineering)">Redundancy</a></li> <li><a href="/wiki/Safety_data_sheet" title="Safety data sheet">Safety data sheet</a></li> <li><a href="/wiki/Situation_awareness" title="Situation awareness">Situation awareness</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Diving_team" title="Diving team">Diving team</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bellman_(diving)" class="mw-redirect" title="Bellman (diving)">Bellman</a></li> <li><a href="/wiki/Chamber_operator" class="mw-redirect" title="Chamber operator">Chamber operator</a></li> <li><a href="/wiki/Diver_medical_technician" class="mw-redirect" title="Diver medical technician">Diver medical technician</a></li> <li><a href="/wiki/Diver%27s_attendant" class="mw-redirect" title="Diver's attendant">Diver's attendant</a></li> <li><a href="/wiki/Diving_supervisor" title="Diving supervisor">Diving supervisor</a></li> <li><a href="/wiki/Diving_systems_technician" class="mw-redirect" title="Diving systems technician">Diving systems technician</a></li> <li><a href="/wiki/Gas_man" class="mw-redirect" title="Gas man">Gas man</a></li> <li><a href="/wiki/Life_support_technician" class="mw-redirect" title="Life support technician">Life support technician</a></li> <li><a href="/wiki/Stand-by_diver" class="mw-redirect" title="Stand-by diver">Stand-by diver</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Equipment<br />safety</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Breathing_gas_quality" class="mw-redirect" title="Breathing gas quality">Breathing gas quality</a></li> <li><a href="/wiki/Testing_and_inspection_of_diving_cylinders" title="Testing and inspection of diving cylinders">Testing and inspection of diving cylinders</a> <ul><li><a href="/wiki/Hydrostatic_test" title="Hydrostatic test">Hydrostatic test</a></li> <li><a href="/wiki/Sustained_load_cracking" title="Sustained load cracking">Sustained load cracking</a></li></ul></li> <li><a href="/wiki/Diving_regulator" title="Diving regulator">Diving regulator</a> <ul><li><a href="/wiki/Breathing_performance_of_regulators" title="Breathing performance of regulators">Breathing performance of regulators</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Occupational_safety_and_health" title="Occupational safety and health">Occupational<br />safety and<br />health</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Association_of_Diving_Contractors_International" title="Association of Diving Contractors International">Association of Diving Contractors International</a></li> <li><a href="/wiki/International_Marine_Contractors_Association" title="International Marine Contractors Association">International Marine Contractors Association</a></li> <li><a href="/wiki/Code_of_practice" title="Code of practice">Code of practice</a></li> <li><a href="/wiki/Contingency_plan" title="Contingency plan">Contingency plan</a></li> <li><a href="/wiki/Diving_regulations" title="Diving regulations">Diving regulations</a></li> <li><a href="/wiki/Emergency_response_plan" class="mw-redirect" title="Emergency response plan">Emergency response plan</a></li> <li><a href="/wiki/Diving_safety_officer" title="Diving safety officer">Diving safety officer</a></li> <li><a href="/wiki/Diving_superintendent" class="mw-redirect" title="Diving superintendent">Diving superintendent</a></li> <li><a href="/wiki/Diving_supervisor" title="Diving supervisor">Diving supervisor</a></li> <li><a href="/wiki/Operations_manual" title="Operations manual">Operations manual</a></li> <li><a href="/wiki/Standard_operating_procedure" title="Standard operating procedure">Standard operating procedure</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr></tbody></table><div> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Diving_medicine" style="font-size:114%;margin:0 4em"><a href="/wiki/Diving_medicine" title="Diving medicine">Diving medicine</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Diving_disorders" title="Diving disorders">Diving<br />disorders</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_signs_and_symptoms_of_diving_disorders" title="List of signs and symptoms of diving disorders">List of signs and symptoms of diving disorders</a></li> <li><a href="/wiki/Cramp" title="Cramp">Cramp</a></li> <li><a href="/wiki/Motion_sickness" title="Motion sickness">Motion sickness</a></li> <li><a href="/wiki/Surfer%27s_ear" title="Surfer's ear">Surfer's ear</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Pressure<br />related</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Alternobaric_vertigo" title="Alternobaric vertigo">Alternobaric vertigo</a></li> <li><a href="/wiki/Barostriction" class="mw-redirect" title="Barostriction">Barostriction</a></li> <li><a href="/wiki/Barotrauma" title="Barotrauma">Barotrauma</a> <ul><li><a href="/wiki/Air_embolism" title="Air embolism">Air embolism</a></li> <li><a href="/wiki/Aerosinusitis" title="Aerosinusitis">Aerosinusitis</a></li> <li><a href="/wiki/Barodontalgia" title="Barodontalgia">Barodontalgia</a></li> <li><a href="/wiki/Dental_barotrauma" class="mw-redirect" title="Dental barotrauma">Dental barotrauma</a></li> <li><a href="/wiki/Middle_ear_barotrauma" title="Middle ear barotrauma">Middle ear barotrauma</a></li> <li><a href="/wiki/Pulmonary_barotrauma" class="mw-redirect" title="Pulmonary barotrauma">Pulmonary barotrauma</a></li></ul></li> <li><a href="/wiki/Compression_arthralgia" title="Compression arthralgia">Compression arthralgia</a></li> <li><a href="/wiki/Decompression_illness" title="Decompression illness">Decompression illness</a></li> <li><a href="/wiki/Dysbarism" title="Dysbarism">Dysbarism</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Oxygen</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Freediving_blackout" title="Freediving blackout">Freediving blackout</a></li> <li><a href="/wiki/Hyperoxia" title="Hyperoxia">Hyperoxia</a></li> <li><a href="/wiki/Hypoxia_(medical)" class="mw-redirect" title="Hypoxia (medical)">Hypoxia</a></li> <li><a href="/wiki/Oxygen_toxicity" title="Oxygen toxicity">Oxygen toxicity</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Inert gases</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Avascular_necrosis" title="Avascular necrosis">Avascular necrosis</a></li> <li><a href="/wiki/Decompression_sickness" title="Decompression sickness">Decompression sickness</a> <ul><li><a href="/wiki/Dysbaric_osteonecrosis" title="Dysbaric osteonecrosis">Dysbaric osteonecrosis</a></li> <li><a href="/wiki/Inner_ear_decompression_sickness" title="Inner ear decompression sickness">Inner ear decompression sickness</a></li> <li><a href="/wiki/Isobaric_counterdiffusion" title="Isobaric counterdiffusion">Isobaric counterdiffusion</a></li> <li><a href="/wiki/Taravana" title="Taravana">Taravana</a></li></ul></li> <li><a href="/wiki/High-pressure_nervous_syndrome" title="High-pressure nervous syndrome">High-pressure nervous syndrome</a></li> <li><a href="/wiki/Hydrogen_narcosis" title="Hydrogen narcosis">Hydrogen narcosis</a></li> <li><a href="/wiki/Nitrogen_narcosis" title="Nitrogen narcosis">Nitrogen narcosis</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Carbon dioxide</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Hypercapnia" title="Hypercapnia">Hypercapnia</a></li> <li><a href="/wiki/Hypocapnia" title="Hypocapnia">Hypocapnia</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Breathing gas<br />contaminants</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Carbon_monoxide_poisoning" title="Carbon monoxide poisoning">Carbon monoxide poisoning</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Immersion<br />related</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Asphyxia" title="Asphyxia">Asphyxia</a></li> <li><a href="/wiki/Drowning" title="Drowning">Drowning</a></li> <li><a href="/wiki/Hypothermia" title="Hypothermia">Hypothermia</a></li> <li><a href="/wiki/Immersion_diuresis" class="mw-redirect" title="Immersion diuresis">Immersion diuresis</a></li> <li><a href="/wiki/Instinctive_drowning_response" title="Instinctive drowning response">Instinctive drowning response</a></li> <li><a href="/wiki/Laryngospasm" title="Laryngospasm">Laryngospasm</a></li> <li><a href="/wiki/Salt_water_aspiration_syndrome" title="Salt water aspiration syndrome">Salt water aspiration syndrome</a></li> <li><a href="/wiki/Swimming-induced_pulmonary_edema" title="Swimming-induced pulmonary edema">Swimming-induced pulmonary edema</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Treatment</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Demand_valve_oxygen_therapy" title="Demand valve oxygen therapy">Demand valve oxygen therapy</a></li> <li><a href="/wiki/First_aid" title="First aid">First aid</a></li> <li><a href="/wiki/Hyperbaric_medicine" title="Hyperbaric medicine">Hyperbaric medicine</a></li> <li><a href="/wiki/Hyperbaric_treatment_schedules" title="Hyperbaric treatment schedules">Hyperbaric treatment schedules</a></li> <li><a href="/wiki/In-water_recompression" title="In-water recompression">In-water recompression</a></li> <li><a href="/wiki/Oxygen_therapy" title="Oxygen therapy">Oxygen therapy</a></li> <li><a href="/wiki/Therapeutic_recompression" class="mw-redirect" title="Therapeutic recompression">Therapeutic recompression</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Personnel</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Diving_Medical_Examiner" class="mw-redirect" title="Diving Medical Examiner">Diving Medical Examiner</a></li> <li><a href="/wiki/Diving_Medical_Practitioner" class="mw-redirect" title="Diving Medical Practitioner">Diving Medical Practitioner</a></li> <li><a href="/wiki/Diving_Medical_Technician" class="mw-redirect" title="Diving Medical Technician">Diving Medical Technician</a></li> <li><a href="/wiki/Hyperbaric_nursing" title="Hyperbaric nursing">Hyperbaric nursing</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Screening</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Atrial_septal_defect" title="Atrial septal defect">Atrial septal defect</a></li> <li><a href="/wiki/Effects_of_drugs_on_fitness_to_dive" class="mw-redirect" title="Effects of drugs on fitness to dive">Effects of drugs on fitness to dive</a></li> <li><a href="/wiki/Fitness_to_dive" title="Fitness to dive">Fitness to dive</a></li> <li><a href="/wiki/Psychological_fitness_to_dive" class="mw-redirect" title="Psychological fitness to dive">Psychological fitness to dive</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Research</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/List_of_researchers_in_diving_physiology_and_medicine" class="mw-redirect" title="List of researchers in diving physiology and medicine">Researchers in<br />diving physiology<br />and medicine</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Arthur_J._Bachrach" title="Arthur J. Bachrach">Arthur J. Bachrach</a></li> <li><a href="/wiki/Albert_R._Behnke" title="Albert R. Behnke">Albert R. Behnke</a></li> <li><a href="/wiki/Peter_B._Bennett" title="Peter B. Bennett">Peter B. Bennett</a></li> <li><a href="/wiki/Paul_Bert" title="Paul Bert">Paul Bert</a></li> <li><a href="/wiki/George_F._Bond" title="George F. Bond">George F. Bond</a></li> <li><a href="/wiki/Robert_Boyle" title="Robert Boyle">Robert Boyle</a></li> <li><a href="/wiki/Alf_O._Brubakk" title="Alf O. Brubakk">Alf O. Brubakk</a></li> <li><a href="/wiki/Albert_A._B%C3%BChlmann" title="Albert A. Bühlmann">Albert A. Bühlmann</a></li> <li><a href="/wiki/John_R._Clarke_(scientist)" title="John R. Clarke (scientist)">John R. Clarke</a></li> <li><a href="/wiki/Guybon_Chesney_Castell_Damant" title="Guybon Chesney Castell Damant">Guybon Chesney Castell Damant</a></li> <li><a href="/wiki/Kenneth_William_Donald" title="Kenneth William Donald">Kenneth William Donald</a></li> <li><a href="/wiki/William_Paul_Fife" title="William Paul Fife">William Paul Fife</a></li> <li><a href="/wiki/John_Scott_Haldane" title="John Scott Haldane">John Scott Haldane</a></li> <li><a href="/wiki/Robert_William_Hamilton_Jr." title="Robert William Hamilton Jr.">Robert William Hamilton Jr.</a></li> <li><a href="/wiki/Henry_Valence_Hempleman" title="Henry Valence Hempleman">Henry Valence Hempleman</a></li> <li><a href="/wiki/Leonard_Erskine_Hill" class="mw-redirect" title="Leonard Erskine Hill">Leonard Erskine Hill</a></li> <li><a href="/wiki/Brian_Andrew_Hills" title="Brian Andrew Hills">Brian Andrew Hills</a></li> <li><a href="/wiki/Felix_Hoppe-Seyler" title="Felix Hoppe-Seyler">Felix Hoppe-Seyler</a></li> <li><a href="/wiki/Christian_J._Lambertsen" title="Christian J. Lambertsen">Christian J. Lambertsen</a></li> <li><a href="/wiki/Simon_Mitchell" title="Simon Mitchell">Simon Mitchell</a></li> <li><a href="/wiki/Charles_Momsen" title="Charles Momsen">Charles Momsen</a></li> <li><a href="/wiki/Neal_W._Pollock" title="Neal W. Pollock">Neal W. Pollock</a></li> <li><a href="/wiki/John_Rawlins_(Royal_Navy_officer)" title="John Rawlins (Royal Navy officer)">John Rawlins</a></li> <li><a href="/wiki/Charles_Wesley_Shilling" title="Charles Wesley Shilling">Charles Wesley Shilling</a></li> <li><a href="/wiki/Edward_D._Thalmann" title="Edward D. Thalmann">Edward D. Thalmann</a></li> <li><a href="/wiki/Jacques_Triger" title="Jacques Triger">Jacques Triger</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Diving medical<br />research<br />organisations</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aerospace_Medical_Association" title="Aerospace Medical Association">Aerospace Medical Association</a></li> <li><a href="/wiki/Divers_Alert_Network" title="Divers Alert Network">Divers Alert Network</a> (DAN)</li> <li><a href="/wiki/Diving_Diseases_Research_Centre" class="mw-redirect" title="Diving Diseases Research Centre">Diving Diseases Research Centre</a> (DDRC)</li> <li><a href="/wiki/Diving_Medical_Advisory_Council" title="Diving Medical Advisory Council">Diving Medical Advisory Council</a> (DMAC)</li> <li><a href="/wiki/European_Diving_Technology_Committee" title="European Diving Technology Committee">European Diving Technology Committee</a> (EDTC)</li> <li><a href="/wiki/European_Underwater_and_Baromedical_Society" title="European Underwater and Baromedical Society">European Underwater and Baromedical Society</a> (EUBS)</li> <li><a href="/wiki/National_Board_of_Diving_and_Hyperbaric_Medical_Technology" title="National Board of Diving and Hyperbaric Medical Technology">National Board of Diving and Hyperbaric Medical Technology</a></li> <li><a href="/wiki/Naval_Submarine_Medical_Research_Laboratory" title="Naval Submarine Medical Research Laboratory">Naval Submarine Medical Research Laboratory</a></li> <li><a href="/wiki/Royal_Australian_Navy_School_of_Underwater_Medicine" title="Royal Australian Navy School of Underwater Medicine">Royal Australian Navy School of Underwater Medicine</a></li> <li><a href="/wiki/Rubicon_Foundation" title="Rubicon Foundation">Rubicon Foundation</a></li> <li><a href="/wiki/South_Pacific_Underwater_Medicine_Society" title="South Pacific Underwater Medicine Society">South Pacific Underwater Medicine Society</a> (SPUMS)</li> <li><a href="/wiki/Southern_African_Underwater_and_Hyperbaric_Medical_Association" title="Southern African Underwater and Hyperbaric Medical Association">Southern African Underwater and Hyperbaric Medical Association</a> (SAUHMA)</li> <li><a href="/wiki/Undersea_and_Hyperbaric_Medical_Society" title="Undersea and Hyperbaric Medical Society">Undersea and Hyperbaric Medical Society</a> (UHMS)</li> <li><a href="/wiki/United_States_Navy_Experimental_Diving_Unit" title="United States Navy Experimental Diving Unit">United States Navy Experimental Diving Unit</a> (NEDU)</li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Law" style="font-size:114%;margin:0 4em">Law</div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Civil_liability_in_recreational_diving" title="Civil liability in recreational diving">Civil liability in recreational diving</a></li> <li><a href="/wiki/Diving_regulations" title="Diving regulations">Diving regulations</a></li> <li><a href="/wiki/Duty_of_care" title="Duty of care">Duty of care</a></li> <li><a href="/wiki/List_of_legislation_regulating_underwater_diving" title="List of legislation regulating underwater diving">List of legislation regulating underwater diving</a></li> <li><a href="/wiki/Investigation_of_diving_accidents" title="Investigation of diving accidents">Investigation of diving accidents</a></li> <li><a href="/wiki/Convention_on_the_Protection_of_the_Underwater_Cultural_Heritage" title="Convention on the Protection of the Underwater Cultural Heritage">Convention on the Protection of the Underwater Cultural Heritage</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="History_of_underwater_diving" style="font-size:114%;margin:0 4em"><a href="/wiki/History_of_underwater_diving" title="History of underwater diving">History of underwater diving</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/History_of_decompression_research_and_development" title="History of decompression research and development">History of decompression research and development</a></li> <li><a href="/wiki/History_of_dive_computers" class="mw-redirect" title="History of dive computers">History of dive computers</a></li> <li><a href="/wiki/History_of_Diving_Museum" title="History of Diving Museum">History of Diving Museum</a></li> <li><a href="/wiki/History_of_scuba_diving" title="History of scuba diving">History of scuba diving</a></li> <li><a href="/wiki/List_of_researchers_in_underwater_diving" title="List of researchers in underwater diving">List of researchers in underwater diving</a></li> <li><a href="/wiki/Lyons_Maritime_Museum" title="Lyons Maritime Museum">Lyons Maritime Museum</a></li> <li><a href="/wiki/Man_in_the_Sea_Museum" title="Man in the Sea Museum">Man in the Sea Museum</a></li> <li><a href="/wiki/Timeline_of_atmospheric_diving_suits" class="mw-redirect" title="Timeline of atmospheric diving suits">Timeline of atmospheric diving suits</a></li> <li><a href="/wiki/Timeline_of_diving_technology" title="Timeline of diving technology">Timeline of diving technology</a></li> <li><a href="/wiki/Pearling_in_Western_Australia" title="Pearling in Western Australia">Pearling in Western Australia</a></li> <li><a href="/wiki/US_Navy_decompression_models_and_tables" title="US Navy decompression models and tables">US Navy decompression models and tables</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Archeological<br />sites</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/SS_Commodore" title="SS Commodore">SS <i>Commodore</i></a></li> <li><a href="/wiki/USS_Monitor" title="USS Monitor">USS <i>Monitor</i></a></li> <li><i><a href="/wiki/Queen_Anne%27s_Revenge" title="Queen Anne's Revenge">Queen Anne's Revenge</a></i></li> <li><i><a href="/wiki/Whydah_Gally" title="Whydah Gally">Whydah Gally</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Underwater art<br />and artists</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/The_Diver" title="The Diver">The Diver</a></li> <li><a href="/wiki/Jason_deCaires_Taylor" title="Jason deCaires Taylor">Jason deCaires Taylor</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Engineers<br />and inventors</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Jer%C3%B3nimo_de_Ayanz_y_Beaumont" title="Jerónimo de Ayanz y Beaumont">Jerónimo de Ayanz y Beaumont</a></li> <li><a href="/wiki/William_Beebe" title="William Beebe">William Beebe</a></li> <li><a href="/wiki/Georges_Beuchat" title="Georges Beuchat">Georges Beuchat</a></li> <li><a href="/wiki/Giovanni_Alfonso_Borelli" title="Giovanni Alfonso Borelli">Giovanni Alfonso Borelli</a></li> <li><a href="/wiki/Joseph-Martin_Cabirol" title="Joseph-Martin Cabirol">Joseph-Martin Cabirol</a></li> <li><a href="/wiki/John_R._Clarke_(scientist)" title="John R. Clarke (scientist)">John R. Clarke</a></li> <li><a href="/wiki/Jacques_Cousteau" title="Jacques Cousteau">Jacques Cousteau</a></li> <li><a href="/wiki/Charles_Anthony_Deane" title="Charles Anthony Deane">Charles Anthony Deane</a></li> <li><a href="/wiki/John_Deane_(inventor)" title="John Deane (inventor)">John Deane</a></li> <li><a href="/wiki/Louis_de_Corlieu" title="Louis de Corlieu">Louis de Corlieu</a></li> <li><a href="/wiki/Auguste_Denayrouze" title="Auguste Denayrouze">Auguste Denayrouze</a></li> <li><a href="/wiki/Ted_Eldred" title="Ted Eldred">Ted Eldred</a></li> <li><a href="/wiki/Henry_Fleuss" title="Henry Fleuss">Henry Fleuss</a></li> <li><a href="/wiki/%C3%89mile_Gagnan" title="Émile Gagnan">Émile Gagnan</a></li> <li><a href="/wiki/Karl_Heinrich_Klingert" title="Karl Heinrich Klingert">Karl Heinrich Klingert</a></li> <li><a href="/wiki/Peter_Kreeft_(diver)" title="Peter Kreeft (diver)">Peter Kreeft</a></li> <li><a href="/wiki/Christian_J._Lambertsen" title="Christian J. Lambertsen">Christian J. Lambertsen</a></li> <li><a href="/wiki/Yves_Le_Prieur" title="Yves Le Prieur">Yves Le Prieur</a></li> <li><a href="/wiki/John_Lethbridge" title="John Lethbridge">John Lethbridge</a></li> <li><a href="/wiki/Ernest_William_Moir" title="Ernest William Moir">Ernest William Moir</a></li> <li><a href="/wiki/Joseph_Salim_Peress" title="Joseph Salim Peress">Joseph Salim Peress</a></li> <li><a href="/wiki/Auguste_Piccard" title="Auguste Piccard">Auguste Piccard</a></li> <li><a href="/wiki/Joe_Savoie" title="Joe Savoie">Joe Savoie</a></li> <li><a href="/wiki/Willard_Franklyn_Searle" title="Willard Franklyn Searle">Willard Franklyn Searle</a></li> <li><a href="/wiki/Gordon_Smith_(inventor)" title="Gordon Smith (inventor)">Gordon Smith</a></li> <li><a href="/wiki/Augustus_Siebe" title="Augustus Siebe">Augustus Siebe</a></li> <li><a href="/wiki/Pierre-Marie_Touboulic" title="Pierre-Marie Touboulic">Pierre-Marie Touboulic</a></li> <li><a href="/wiki/Jacques_Triger" title="Jacques Triger">Jacques Triger</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Historical<br />equipment</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aqua-Lung" title="Aqua-Lung">Aqua-Lung</a></li> <li><a href="/wiki/RV_Calypso" title="RV Calypso">RV <i>Calypso</i></a></li> <li><a href="/wiki/SP-350_Denise" title="SP-350 Denise">SP-350 <i>Denise</i></a></li> <li><a href="/wiki/Magnesium_torch" title="Magnesium torch">Magnesium torch</a></li> <li><a href="/wiki/Nikonos" title="Nikonos">Nikonos</a></li> <li><a href="/wiki/Porpoise_(scuba_gear)" title="Porpoise (scuba gear)">Porpoise regulator</a></li> <li><a href="/wiki/Standard_diving_dress" title="Standard diving dress">Standard diving dress</a></li> <li><a href="/wiki/Sub_Marine_Explorer" title="Sub Marine Explorer">Sub Marine Explorer</a></li> <li><a href="/wiki/Vintage_scuba" title="Vintage scuba">Vintage scuba</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Diverpropulsionvehicles" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Diver_propulsion_vehicle" title="Diver propulsion vehicle">Diver<br />propulsion<br />vehicles</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Advanced_SEAL_Delivery_System" title="Advanced SEAL Delivery System">Advanced SEAL Delivery System</a></li> <li><a href="/wiki/Cosmos_CE2F_series" title="Cosmos CE2F series">Cosmos CE2F series</a></li> <li><a href="/wiki/Dry_Combat_Submersible" title="Dry Combat Submersible">Dry Combat Submersible</a></li> <li><a href="/wiki/Human_torpedo" title="Human torpedo">Human torpedo</a></li> <li><a href="/wiki/Motorised_Submersible_Canoe" title="Motorised Submersible Canoe">Motorised Submersible Canoe</a></li> <li><a href="/wiki/Necker_Nymph" title="Necker Nymph">Necker Nymph</a></li> <li><a href="/wiki/R-2_Mala-class_swimmer_delivery_vehicle" title="R-2 Mala-class swimmer delivery vehicle">R-2 Mala-class swimmer delivery vehicle</a></li> <li><a href="/wiki/SEAL_Delivery_Vehicle" title="SEAL Delivery Vehicle">SEAL Delivery Vehicle</a></li> <li><a href="/wiki/Shallow_Water_Combat_Submersible" title="Shallow Water Combat Submersible">Shallow Water Combat Submersible</a></li> <li><a href="/wiki/Siluro_San_Bartolomeo" title="Siluro San Bartolomeo">Siluro San Bartolomeo</a></li> <li><a href="/wiki/Welfreighter" title="Welfreighter">Welfreighter</a></li> <li><a href="/wiki/Wet_Nellie" title="Wet Nellie">Wet Nellie</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Military and<br />covert operations</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Raid_on_Alexandria_(1941)" title="Raid on Alexandria (1941)">Raid on Alexandria (1941)</a></li> <li><a href="/wiki/Sinking_of_the_Rainbow_Warrior" title="Sinking of the Rainbow Warrior">Sinking of the <i>Rainbow Warrior</i></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Scientific projects</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/1992_cageless_shark-diving_expedition" title="1992 cageless shark-diving expedition">1992 cageless shark-diving expedition</a></li> <li><a href="/wiki/Mission_31" title="Mission 31">Mission 31</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Awards and events</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Hans_Hass_Award" title="Hans Hass Award">Hans Hass Award</a></li> <li><a href="/wiki/International_Scuba_Diving_Hall_of_Fame" title="International Scuba Diving Hall of Fame">International Scuba Diving Hall of Fame</a></li> <li><a href="/wiki/London_Diving_Chamber_Dive_Lectures" title="London Diving Chamber Dive Lectures">London Diving Chamber Dive Lectures</a></li> <li><a href="/wiki/NOGI_Awards" title="NOGI Awards">NOGI Awards</a></li> <li><a href="/wiki/Women_Divers_Hall_of_Fame" title="Women Divers Hall of Fame">Women Divers Hall of Fame</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Incidents</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Dive_boat" title="Dive boat">Dive boat</a> incidents</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Sinking_of_MV_Conception" title="Sinking of MV Conception">Sinking of MV <i>Conception</i></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Diver rescues</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Alpazat_cave_rescue" title="Alpazat cave rescue">Alpazat cave rescue</a></li> <li><a href="/wiki/Tham_Luang_cave_rescue" title="Tham Luang cave rescue">Tham Luang cave rescue</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Early diving</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/John_Day_(carpenter)" title="John Day (carpenter)">John Day (carpenter)</a></li> <li><a href="/wiki/Charles_Spalding" title="Charles Spalding">Charles Spalding</a></li> <li><a href="/wiki/Ebenezer_Watson" class="mw-redirect" title="Ebenezer Watson">Ebenezer Watson</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Freediving" title="Freediving">Freediving</a> fatalities</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Stephen_Keenan" title="Stephen Keenan">Stephen Keenan</a></li> <li><a href="/wiki/Lo%C3%AFc_Leferme" title="Loïc Leferme">Loïc Leferme</a></li> <li><a href="/wiki/Audrey_Mestre" title="Audrey Mestre">Audrey Mestre</a></li> <li><a href="/wiki/Nicholas_Mevoli" title="Nicholas Mevoli">Nicholas Mevoli</a></li> <li><a href="/wiki/Natalia_Molchanova" title="Natalia Molchanova">Natalia Molchanova</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Offshore_diving" class="mw-redirect" title="Offshore diving">Offshore<br />diving</a> incidents</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Byford_Dolphin#Diving_bell_accident" title="Byford Dolphin"><i>Byford Dolphin</i> diving bell accident</a></li> <li><a href="/wiki/Drill_Master_diving_accident" title="Drill Master diving accident"><i>Drill Master</i> diving accident</a></li> <li><a href="/wiki/Star_Canopus_diving_accident" title="Star Canopus diving accident"><i>Star Canopus</i> diving accident</a></li> <li><a href="/wiki/Stena_Seaspread_diving_accident" title="Stena Seaspread diving accident"><i>Stena Seaspread</i> diving accident</a></li> <li><a href="/wiki/Venture_One_diving_accident" class="mw-redirect" title="Venture One diving accident"><i>Venture One</i> diving accident</a></li> <li><a href="/wiki/Waage_Drill_II_diving_accident" title="Waage Drill II diving accident"><i>Waage Drill II</i> diving accident</a></li> <li><a href="/wiki/Wildrake_diving_accident" title="Wildrake diving accident"><i>Wildrake</i> diving accident</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Professional_diving" title="Professional diving">Professional<br />diving</a> fatalities</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Roger_Baldwin_(diver)" class="mw-redirect" title="Roger Baldwin (diver)">Roger Baldwin</a></li> <li><a href="/wiki/John_Bennett_(diver)" title="John Bennett (diver)">John Bennett</a></li> <li><a href="/wiki/Victor_F._Guiel_Jr." class="mw-redirect" title="Victor F. Guiel Jr.">Victor F. Guiel Jr.</a></li> <li><a href="/wiki/Francis_P._Hammerberg" title="Francis P. Hammerberg">Francis P. Hammerberg</a></li> <li><a href="/wiki/Craig_M._Hoffman" class="mw-redirect" title="Craig M. Hoffman">Craig M. Hoffman</a></li> <li><a href="/wiki/Peter_Henry_Michael_Holmes" class="mw-redirect" title="Peter Henry Michael Holmes">Peter Henry Michael Holmes</a></li> <li><a href="/wiki/Johnson_Sea_Link_accident" title="Johnson Sea Link accident">Johnson Sea Link accident</a> <ul><li><a href="/wiki/Edwin_Clayton_Link" class="mw-redirect" title="Edwin Clayton Link">Edwin Clayton Link</a></li></ul></li> <li><a href="/wiki/Gerard_Anthony_Prangley" class="mw-redirect" title="Gerard Anthony Prangley">Gerard Anthony Prangley</a></li> <li><a href="/wiki/Per_Skipnes" class="mw-redirect" title="Per Skipnes">Per Skipnes</a></li> <li><a href="/wiki/Robert_John_Smyth" class="mw-redirect" title="Robert John Smyth">Robert John Smyth</a></li> <li><a href="/wiki/Albert_D._Stover" class="mw-redirect" title="Albert D. Stover">Albert D. Stover</a></li> <li><a href="/wiki/Richard_A._Walker" class="mw-redirect" title="Richard A. Walker">Richard A. Walker</a></li> <li><a href="/wiki/Lothar_Michael_Ward" class="mw-redirect" title="Lothar Michael Ward">Lothar Michael Ward</a></li> <li><a href="/wiki/Joachim_Wendler" title="Joachim Wendler">Joachim Wendler</a></li> <li><a href="/wiki/Death_of_Bradley_Westell" title="Death of Bradley Westell">Bradley Westell</a></li> <li><a href="/wiki/Arne_Zetterstr%C3%B6m" title="Arne Zetterström">Arne Zetterström</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Scuba_diving_fatalities" title="Scuba diving fatalities">Scuba diving<br />fatalities</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/1973_Mount_Gambier_cave_diving_accident" title="1973 Mount Gambier cave diving accident">1973 Mount Gambier cave diving accident</a></li> <li><a href="/wiki/Ricardo_Armbruster" title="Ricardo Armbruster">Ricardo Armbruster</a></li> <li><a href="/wiki/Allan_Bridge" title="Allan Bridge">Allan Bridge</a></li> <li><a href="/wiki/David_Bright_(diver)" title="David Bright (diver)">David Bright</a></li> <li><a href="/wiki/Berry_L._Cannon" title="Berry L. Cannon">Berry L. Cannon</a></li> <li><a href="/wiki/Cotton_Coulson" title="Cotton Coulson">Cotton Coulson</a></li> <li><a href="/wiki/Cl%C3%A1udio_Coutinho" title="Cláudio Coutinho">Cláudio Coutinho</a></li> <li><a href="/wiki/E._Yale_Dawson" title="E. Yale Dawson">E. Yale Dawson</a></li> <li><a href="/wiki/Deon_Dreyer" title="Deon Dreyer">Deon Dreyer</a></li> <li><a href="/wiki/Milan_Dufek" title="Milan Dufek">Milan Dufek</a></li> <li><a href="/wiki/Sheck_Exley" title="Sheck Exley">Sheck Exley</a></li> <li><a href="/wiki/Maurice_Fargues" title="Maurice Fargues">Maurice Fargues</a></li> <li><a href="/wiki/Fernando_Garfella_Palmer" title="Fernando Garfella Palmer">Fernando Garfella Palmer</a></li> <li><a href="/wiki/Guy_Garman" title="Guy Garman">Guy Garman</a></li> <li><a href="/wiki/Steve_Irwin" title="Steve Irwin">Steve Irwin</a> <ul><li><a href="/wiki/Death_of_Steve_Irwin" title="Death of Steve Irwin">death</a></li></ul></li> <li><a href="/wiki/Jim_Jones_(American_football,_born_1935)" title="Jim Jones (American football, born 1935)">Jim Jones</a></li> <li><a href="/wiki/Henry_Way_Kendall" title="Henry Way Kendall">Henry Way Kendall</a></li> <li><a href="/wiki/Artur_Koz%C5%82owski_(speleologist)" title="Artur Kozłowski (speleologist)">Artur Kozłowski</a></li> <li><a href="/wiki/Yuri_Lipski" class="mw-redirect" title="Yuri Lipski">Yuri Lipski</a></li> <li><a href="/wiki/Kirsty_MacColl" title="Kirsty MacColl">Kirsty MacColl</a></li> <li><a href="/wiki/Death_of_Linnea_Mills" title="Death of Linnea Mills">Linnea Mills</a></li> <li><a href="/wiki/Agnes_Milowka" title="Agnes Milowka">Agnes Milowka</a></li> <li><a href="/wiki/Fran%C3%A7ois_de_Roubaix" title="François de Roubaix">François de Roubaix</a></li> <li><a href="/wiki/The_Last_Dive" title="The Last Dive">Chris and Chrissy Rouse</a></li> <li><a href="/wiki/Dave_Shaw" title="Dave Shaw">Dave Shaw</a></li> <li><a href="/wiki/Wesley_C._Skiles" title="Wesley C. Skiles">Wesley C. Skiles</a></li> <li><a href="/wiki/Dewey_Smith" title="Dewey Smith">Dewey Smith</a></li> <li><a href="/wiki/Rob_Stewart_(filmmaker)" title="Rob Stewart (filmmaker)">Rob Stewart</a></li> <li><a href="/wiki/Esbj%C3%B6rn_Svensson" title="Esbjörn Svensson">Esbjörn Svensson</a></li> <li><a href="/wiki/Josef_Velek" title="Josef Velek">Josef Velek</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Publications" style="font-size:114%;margin:0 4em">Publications</div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Manuals</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/NOAA_Diving_Manual" title="NOAA Diving Manual">NOAA Diving Manual</a></i></li> <li><i><a href="/wiki/U.S._Navy_Diving_Manual" title="U.S. Navy Diving Manual">U.S. Navy Diving Manual</a></i></li> <li><i><a href="/wiki/Basic_Cave_Diving:_A_Blueprint_for_Survival" title="Basic Cave Diving: A Blueprint for Survival">Basic Cave Diving: A Blueprint for Survival</a></i></li> <li><i><a href="/w/index.php?title=Underwater_Handbook&action=edit&redlink=1" class="new" title="Underwater Handbook (page does not exist)">Underwater Handbook</a></i></li> <li><i><a href="/w/index.php?title=Bennett_and_Elliott%27s_physiology_and_medicine_of_diving&action=edit&redlink=1" class="new" title="Bennett and Elliott's physiology and medicine of diving (page does not exist)">Bennett and Elliott's physiology and medicine of diving</a></i></li> <li><i><a href="/w/index.php?title=Encyclopedia_of_Recreational_Diving&action=edit&redlink=1" class="new" title="Encyclopedia of Recreational Diving (page does not exist)">Encyclopedia of Recreational Diving</a></i></li> <li><i><a href="/w/index.php?title=The_new_science_of_skin_and_scuba_diving&action=edit&redlink=1" class="new" title="The new science of skin and scuba diving (page does not exist)">The new science of skin and scuba diving</a></i></li> <li><i><a href="/w/index.php?title=Professional_Diver%27s_Handbook&action=edit&redlink=1" class="new" title="Professional Diver's Handbook (page does not exist)">Professional Diver's Handbook</a></i></li> <li><i><a href="/w/index.php?title=Basic_Scuba&action=edit&redlink=1" class="new" title="Basic Scuba (page does not exist)">Basic Scuba</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Standards and<br />Codes of Practice</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Code_of_Practice_for_Scientific_Diving_(UNESCO)" class="mw-redirect" title="Code of Practice for Scientific Diving (UNESCO)">Code of Practice for Scientific Diving (UNESCO)</a></li> <li><a href="/wiki/DIN_7876" title="DIN 7876">DIN 7876</a></li> <li><a href="/wiki/IMCA_Code_of_Practice_for_Offshore_Diving" class="mw-redirect" title="IMCA Code of Practice for Offshore Diving">IMCA Code of Practice for Offshore Diving</a></li> <li><a href="/wiki/ISO_24801_Recreational_diving_services_%E2%80%94_Requirements_for_the_training_of_recreational_scuba_divers" class="mw-redirect" title="ISO 24801 Recreational diving services — Requirements for the training of recreational scuba divers">ISO 24801 Recreational diving services — Requirements for the training of recreational scuba divers</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">General non-fiction</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/The_Darkness_Beckons" title="The Darkness Beckons">The Darkness Beckons</a></i></li> <li><i><a href="/wiki/Goldfinder" title="Goldfinder">Goldfinder</a></i></li> <li><i><a href="/wiki/The_Last_Dive" title="The Last Dive">The Last Dive</a></i></li> <li><i><a href="/wiki/Shadow_Divers" title="Shadow Divers">Shadow Divers</a></i></li> <li><i><a href="/wiki/The_Silent_World:_A_Story_of_Undersea_Discovery_and_Adventure" title="The Silent World: A Story of Undersea Discovery and Adventure">The Silent World: A Story of Undersea Discovery and Adventure</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Research</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_Divers_Alert_Network_publications" title="List of Divers Alert Network publications">List of Divers Alert Network publications</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Dive_guide_(publication)" class="mw-redirect" title="Dive guide (publication)">Dive guides</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li class="mw-empty-elt"></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Training_and_registration" style="font-size:114%;margin:0 4em">Training and registration</div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Diver_training" title="Diver training">Diver<br />training</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Competence and assessment <ul><li><a href="/wiki/Competency-based_learning" title="Competency-based learning">Competency-based learning</a></li> <li><a href="/wiki/Refresher_training_(diving)" class="mw-redirect" title="Refresher training (diving)">Refresher training</a></li> <li><a href="/wiki/Skill_assessment" title="Skill assessment">Skill assessment</a></li></ul></li> <li><a href="/wiki/Diver_training_standard" title="Diver training standard">Diver training standard</a></li> <li><a href="/wiki/Diving_instructor" title="Diving instructor">Diving instructor</a></li> <li><a href="/wiki/Diving_school" class="mw-redirect" title="Diving school">Diving school</a></li> <li>Occupational diver training <ul><li><a href="/wiki/Commercial_diver_training" class="mw-redirect" title="Commercial diver training">Commercial diver training</a></li> <li><a href="/wiki/Military_diver_training" class="mw-redirect" title="Military diver training">Military diver training</a></li> <li><a href="/wiki/Public_safety_diver_training" class="mw-redirect" title="Public safety diver training">Public safety diver training</a></li> <li><a href="/wiki/Scientific_diver_training" class="mw-redirect" title="Scientific diver training">Scientific diver training</a></li></ul></li> <li><a href="/wiki/Recreational_diver_training" title="Recreational diver training">Recreational diver training</a> <ul><li><a href="/wiki/Introductory_diving" title="Introductory diving">Introductory diving</a></li> <li><a href="/wiki/ISO_recreational_diving_training_standards" class="mw-redirect" title="ISO recreational diving training standards">ISO training standards</a></li></ul></li> <li><a href="/wiki/Teaching_method" title="Teaching method">Teaching method</a> <ul><li><a href="/wiki/Muscle_memory" title="Muscle memory">Muscle memory</a></li> <li><a href="/wiki/Overlearning" title="Overlearning">Overlearning</a></li> <li><a href="/wiki/Stress_exposure_training" title="Stress exposure training">Stress exposure training</a></li></ul></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Skills" scope="row" class="navbox-group" style="width:1%">Skills</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Combat_sidestroke" title="Combat sidestroke">Combat sidestroke</a></li> <li><a href="/wiki/Diver_navigation" title="Diver navigation">Diver navigation</a></li> <li><a href="/wiki/Diver_trim" title="Diver trim">Diver trim</a></li> <li><a href="/wiki/Ear_clearing" title="Ear clearing">Ear clearing</a> <ul><li><a href="/wiki/Frenzel_maneuver" title="Frenzel maneuver">Frenzel maneuver</a></li> <li><a href="/wiki/Valsalva_maneuver" title="Valsalva maneuver">Valsalva maneuver</a></li></ul></li> <li><a href="/wiki/Finning_techniques" title="Finning techniques">Finning techniques</a></li> <li><a href="/wiki/Scuba_skills" title="Scuba skills">Scuba skills</a> <ul><li><a href="/wiki/Buddy_breathing" title="Buddy breathing">Buddy breathing</a></li> <li><a href="/wiki/Low_impact_diving" title="Low impact diving">Low impact diving</a> <ul><li><a href="/wiki/Diamond_Reef_System" title="Diamond Reef System">Diamond Reef System</a></li></ul></li></ul></li> <li><a href="/wiki/Surface-supplied_diving_skills" title="Surface-supplied diving skills">Surface-supplied diving skills</a></li> <li><a href="/wiki/Underwater_searches" title="Underwater searches">Underwater searches</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Recreational_scuba_certification_levels" title="Recreational scuba certification levels">Recreational<br />scuba<br />certification<br />levels</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Core diving skills</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Advanced_Open_Water_Diver" title="Advanced Open Water Diver">Advanced Open Water Diver</a></li> <li><a href="/wiki/Autonomous_diver" title="Autonomous diver">Autonomous diver</a></li> <li><a href="/wiki/CMAS*_scuba_diver" title="CMAS* scuba diver">CMAS* scuba diver</a></li> <li><a href="/wiki/CMAS**_scuba_diver" title="CMAS** scuba diver">CMAS** scuba diver</a></li> <li><a href="/wiki/Introductory_diving" title="Introductory diving">Introductory diving</a></li> <li><a href="/wiki/Low_Impact_Diver" class="mw-redirect" title="Low Impact Diver">Low Impact Diver</a></li> <li><a href="/wiki/Master_Scuba_Diver" title="Master Scuba Diver">Master Scuba Diver</a></li> <li><a href="/wiki/Open_Water_Diver" title="Open Water Diver">Open Water Diver</a></li> <li><a href="/wiki/Supervised_diver" title="Supervised diver">Supervised diver</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Leadership skills</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Dive_leader" title="Dive leader">Dive leader</a> <ul><li><a href="/wiki/Divemaster" title="Divemaster">Divemaster</a></li></ul></li> <li><a href="/wiki/Diving_instructor" title="Diving instructor">Diving instructor</a> <ul><li><a href="/wiki/Master_Instructor" class="mw-redirect" title="Master Instructor">Master Instructor</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Specialist skills</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Rescue_Diver" title="Rescue Diver">Rescue Diver</a></li> <li><a href="/wiki/Solo_diver" class="mw-redirect" title="Solo diver">Solo diver</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Diver_training_organization" title="Diver training organization">Diver training<br />certification<br />and registration<br />organisations</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/European_Underwater_Federation" title="European Underwater Federation">European Underwater Federation</a> (EUF)</li> <li><a href="/wiki/International_Diving_Regulators_and_Certifiers_Forum" title="International Diving Regulators and Certifiers Forum">International Diving Regulators and Certifiers Forum</a> (IDRCF)</li> <li><a href="/wiki/International_Diving_Schools_Association" title="International Diving Schools Association">International Diving Schools Association</a> (IDSA)</li> <li><a href="/wiki/International_Marine_Contractors_Association" title="International Marine Contractors Association">International Marine Contractors Association</a> (IMCA)</li> <li><a href="/wiki/List_of_diver_certification_organizations" title="List of diver certification organizations">List of diver certification organizations</a></li> <li><a href="/wiki/National_Oceanic_and_Atmospheric_Administration" title="National Oceanic and Atmospheric Administration">National Oceanic and Atmospheric Administration</a> (NOAA)</li> <li><a href="/wiki/Nautical_Archaeology_Society" title="Nautical Archaeology Society">Nautical Archaeology Society</a></li> <li><a href="/wiki/Recreational_diver_course_referral" title="Recreational diver course referral">Recreational diver course referral</a></li> <li><a href="/wiki/World_Recreational_Scuba_Training_Council" title="World Recreational Scuba Training Council">World Recreational Scuba Training Council</a> (WRSTC)</li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Commercial diver<br />certification<br />authorities</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Australian_Diver_Accreditation_Scheme" title="Australian Diver Accreditation Scheme">Australian Diver Accreditation Scheme</a> (ADAS)</li> <li><a href="/wiki/Commercial_diver_registration_in_South_Africa" title="Commercial diver registration in South Africa">Commercial diver registration in South Africa</a></li> <li><a href="/wiki/Divers_Institute_of_Technology" title="Divers Institute of Technology">Divers Institute of Technology</a></li> <li><a href="/wiki/Health_and_Safety_Executive" title="Health and Safety Executive">Health and Safety Executive</a> (HSE)</li> <li><a href="/wiki/Department_of_Employment_and_Labour" title="Department of Employment and Labour">Department of Employment and Labour</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Commercial diving<br />schools</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Divers_Academy_International" title="Divers Academy International">Divers Academy International</a></li> <li><a href="/wiki/Western_Norway_University_of_Applied_Sciences#Norwegian_diver_school" title="Western Norway University of Applied Sciences">Norwegian diver school</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Free-diving<br />certification<br />agencies</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/AIDA_International" title="AIDA International">AIDA International</a> (AIDA)</li> <li><a href="/wiki/Conf%C3%A9d%C3%A9ration_Mondiale_des_Activit%C3%A9s_Subaquatiques" title="Confédération Mondiale des Activités Subaquatiques">Confédération Mondiale des Activités Subaquatiques</a> (CMAS)</li> <li><a href="/wiki/Performance_Freediving_International" title="Performance Freediving International">Performance Freediving International</a> (PI)</li> <li><a href="/wiki/Scuba_Schools_International" title="Scuba Schools International">Scuba Schools International</a> (SSI)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Recreational<br />scuba<br />certification<br />agencies</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/American_Canadian_Underwater_Certifications" title="American Canadian Underwater Certifications">American Canadian Underwater Certifications</a> (ACUC)</li> <li><a href="/wiki/American_Nitrox_Divers_International" title="American Nitrox Divers International">American Nitrox Divers International</a> (ANDI)</li> <li><a href="/wiki/Association_nationale_des_moniteurs_de_plong%C3%A9e" title="Association nationale des moniteurs de plongée">Association nationale des moniteurs de plongée</a> (ANMP)</li> <li><a href="/wiki/British_Sub-Aqua_Club" title="British Sub-Aqua Club">British Sub-Aqua Club</a> (BSAC)</li> <li><a href="/wiki/Comhairle_Fo-Thuinn" title="Comhairle Fo-Thuinn">Comhairle Fo-Thuinn</a> (CFT)</li> <li><a href="/wiki/Conf%C3%A9d%C3%A9ration_Mondiale_des_Activit%C3%A9s_Subaquatiques" title="Confédération Mondiale des Activités Subaquatiques">Confédération Mondiale des Activités Subaquatiques</a> (CMAS)</li> <li><a href="/wiki/Federaci%C3%B3n_Espa%C3%B1ola_de_Actividades_Subacu%C3%A1ticas" title="Federación Española de Actividades Subacuáticas">Federación Española de Actividades Subacuáticas</a> (FEDAS)</li> <li><a href="/wiki/F%C3%A9d%C3%A9ration_Fran%C3%A7aise_d%27%C3%89tudes_et_de_Sports_Sous-Marins" title="Fédération Française d'Études et de Sports Sous-Marins">Fédération Française d'Études et de Sports Sous-Marins</a> (FFESSM)</li> <li><a href="/wiki/Federazione_Italiana_Attivit%C3%A0_Subacquee" title="Federazione Italiana Attività Subacquee">Federazione Italiana Attività Subacquee</a> (FIAS)</li> <li><a href="/wiki/Global_Underwater_Explorers" title="Global Underwater Explorers">Global Underwater Explorers</a> (GUE)</li> <li><a href="/wiki/International_Association_for_Handicapped_Divers" title="International Association for Handicapped Divers">International Association for Handicapped Divers</a> (IAHD)</li> <li><a href="/wiki/International_Association_of_Nitrox_and_Technical_Divers" title="International Association of Nitrox and Technical Divers">International Association of Nitrox and Technical Divers</a> (IANTD)</li> <li><a href="/wiki/International_Life_Saving_Federation" title="International Life Saving Federation">International Life Saving Federation</a> (ILS)</li> <li><a href="/wiki/Israeli_Diving_Federation" title="Israeli Diving Federation">Israeli Diving Federation</a> (TIDF)</li> <li><a href="/wiki/National_Academy_of_Scuba_Educators" title="National Academy of Scuba Educators">National Academy of Scuba Educators</a> (NASE)</li> <li><a href="/wiki/National_Association_of_Underwater_Instructors" title="National Association of Underwater Instructors">National Association of Underwater Instructors</a> (NAUI)</li> <li><a href="/wiki/Nederlandse_Onderwatersport_Bond" title="Nederlandse Onderwatersport Bond">Nederlandse Onderwatersport Bond</a> (NOB)</li> <li><a href="/wiki/Professional_Association_of_Diving_Instructors" title="Professional Association of Diving Instructors">Professional Association of Diving Instructors</a> (PADI)</li> <li><a href="/wiki/Professional_Diving_Instructors_Corporation" title="Professional Diving Instructors Corporation">Professional Diving Instructors Corporation</a> (PDIC)</li> <li><a href="/wiki/Professional_Technical_and_Recreational_Diving" title="Professional Technical and Recreational Diving">Professional Technical and Recreational Diving</a> (ProTec)</li> <li><a href="/wiki/Rebreather_Association_of_International_Divers" title="Rebreather Association of International Divers">Rebreather Association of International Divers</a> (RAID)</li> <li><a href="/wiki/Sub-Aqua_Association" title="Sub-Aqua Association">Sub-Aqua Association</a> (SAA)</li> <li><a href="/wiki/Scuba_Diving_International" title="Scuba Diving International">Scuba Diving International</a> (SDI)</li> <li><a href="/wiki/Scuba_Educators_International" title="Scuba Educators International">Scuba Educators International</a> (SEI)</li> <li><a href="/wiki/Scottish_Sub_Aqua_Club" title="Scottish Sub Aqua Club">Scottish Sub Aqua Club</a> (ScotSAC)</li> <li><a href="/wiki/Scuba_Schools_International" title="Scuba Schools International">Scuba Schools International</a> (SSI)</li> <li><a href="/wiki/Turkish_Underwater_Sports_Federation" title="Turkish Underwater Sports Federation">Türkiye Sualtı Sporları Federasyonu</a> (TSSF)</li> <li><a href="/wiki/United_Diving_Instructors" title="United Diving Instructors">United Diving Instructors</a> (UDI)</li> <li><a href="/wiki/YMCA_SCUBA_Program" title="YMCA SCUBA Program">YMCA SCUBA Program</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Scientific diver<br />certification<br />authorities</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/American_Academy_of_Underwater_Sciences" title="American Academy of Underwater Sciences">American Academy of Underwater Sciences</a> (AAUS)</li> <li><a href="/wiki/Conf%C3%A9d%C3%A9ration_Mondiale_des_Activit%C3%A9s_Subaquatiques#Scientific_committee" title="Confédération Mondiale des Activités Subaquatiques">CMAS Scientific Committee</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Technical diver<br />certification<br />agencies</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/American_Nitrox_Divers_International" title="American Nitrox Divers International">American Nitrox Divers International</a> (ANDI)</li> <li><a href="/wiki/British_Sub-Aqua_Club" title="British Sub-Aqua Club">British Sub-Aqua Club</a> (BSAC)</li> <li><a href="/wiki/Conf%C3%A9d%C3%A9ration_Mondiale_des_Activit%C3%A9s_Subaquatiques" title="Confédération Mondiale des Activités Subaquatiques">Confédération Mondiale des Activités Subaquatiques</a> (CMAS)</li> <li><a href="/wiki/Diving_Science_and_Technology" title="Diving Science and Technology">Diving Science and Technology</a> (DSAT)</li> <li><a href="/wiki/Federazione_Italiana_Attivit%C3%A0_Subacquee" title="Federazione Italiana Attività Subacquee">Federazione Italiana Attività Subacquee</a> (FIAS)</li> <li><a href="/wiki/International_Association_of_Nitrox_and_Technical_Divers" title="International Association of Nitrox and Technical Divers">International Association of Nitrox and Technical Divers</a> (IANTD)</li> <li><a href="/wiki/Professional_Association_of_Diving_Instructors" title="Professional Association of Diving Instructors">Professional Association of Diving Instructors</a> (PADI)</li> <li><a href="/wiki/Professional_Diving_Instructors_Corporation" title="Professional Diving Instructors Corporation">Professional Diving Instructors Corporation</a> (PDIC)</li> <li><a href="/wiki/Professional_Technical_and_Recreational_Diving" title="Professional Technical and Recreational Diving">Professional Technical and Recreational Diving</a> (ProTec)</li> <li><a href="/wiki/Rebreather_Association_of_International_Divers" title="Rebreather Association of International Divers">Rebreather Association of International Divers</a> (RAID)</li> <li><a href="/wiki/Trimix_Scuba_Association" title="Trimix Scuba Association">Trimix Scuba Association</a> (TSA)</li> <li><a href="/wiki/Scuba_Schools_International" title="Scuba Schools International">Technical Extended Range</a> (TXR)</li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Cavediving" scope="row" class="navbox-group" style="width:1%">Cave<br />diving</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cave_Divers_Association_of_Australia" title="Cave Divers Association of Australia">Cave Divers Association of Australia</a> (CDAA)</li> <li><a href="/wiki/Cave_Diving_Group" title="Cave Diving Group">Cave Diving Group</a> (CDG)</li> <li><a href="/wiki/Global_Underwater_Explorers" title="Global Underwater Explorers">Global Underwater Explorers</a> (GUE)</li> <li><a href="/wiki/National_Speleological_Society#Cave_Diving_Group" title="National Speleological Society">National Speleological Society#Cave Diving Group</a> (CDG)</li> <li><a href="/wiki/National_Association_of_Underwater_Instructors" title="National Association of Underwater Instructors">National Association of Underwater Instructors</a> (NAUI)</li> <li><a href="/wiki/Technical_Diving_International" title="Technical Diving International">Technical Diving International</a> (TDI)</li></ul> </div></td></tr></tbody></table><div> </div></td></tr></tbody></table><div> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Military diver<br />training centres</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Defence_Diving_School" title="Defence Diving School">Defence Diving School</a></li> <li><a href="/wiki/Naval_Support_Activity_Panama_City#Tenant_commands" title="Naval Support Activity Panama City">Navy Diving Salvage and Training Center</a></li> <li><a href="/wiki/Underwater_Escape_Training_Unit" title="Underwater Escape Training Unit">Underwater Escape Training Unit</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Military diver<br />training courses</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/United_States_Marine_Corps_Combatant_Diver_Course" title="United States Marine Corps Combatant Diver Course">United States Marine Corps Combatant Diver Course</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Underwater_sports" style="font-size:114%;margin:0 4em"><a href="/wiki/Underwater_sports" title="Underwater sports">Underwater sports</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Surface snorkeling</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Finswimming" title="Finswimming">Finswimming</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Snorkeling/breath-hold</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Spearfishing" title="Spearfishing">Spearfishing</a></li> <li><a href="/wiki/Underwater_football" title="Underwater football">Underwater football</a></li> <li><a href="/wiki/Underwater_hockey" title="Underwater hockey">Underwater hockey</a> <ul><li><a href="/wiki/Underwater_hockey_in_Australia" title="Underwater hockey in Australia">Australia</a></li> <li><a href="/wiki/Underwater_hockey_in_Turkey" title="Underwater hockey in Turkey">Turkey</a></li></ul></li> <li><a href="/wiki/Underwater_rugby" title="Underwater rugby">Underwater rugby</a> <ul><li><a href="/wiki/Underwater_rugby_in_Colombia" class="mw-redirect" title="Underwater rugby in Colombia">Colombia</a></li> <li><a href="/wiki/Underwater_rugby_in_the_United_States" title="Underwater rugby in the United States">United States</a></li></ul></li> <li><a href="/wiki/Underwater_target_shooting" title="Underwater target shooting">Underwater target shooting</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Breath-hold</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aquathlon_(underwater_wrestling)" title="Aquathlon (underwater wrestling)">Aquathlon</a></li> <li><a href="/wiki/Apnoea_finswimming" class="mw-redirect" title="Apnoea finswimming">Apnoea finswimming</a></li> <li><a href="/wiki/Freediving" title="Freediving">Freediving</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Open Circuit Scuba</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Immersion_finswimming" class="mw-redirect" title="Immersion finswimming">Immersion finswimming</a></li> <li><a href="/wiki/Sport_diving_(sport)" title="Sport diving (sport)">Sport diving</a></li> <li><a href="/wiki/Underwater_cycling" title="Underwater cycling">Underwater cycling</a></li> <li><a href="/wiki/Underwater_orienteering" title="Underwater orienteering">Underwater orienteering</a></li> <li><a href="/wiki/Underwater_photography_(sport)" title="Underwater photography (sport)">Underwater photography</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Rebreather</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Underwater_photography_(sport)" title="Underwater photography (sport)">Underwater photography</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Sports governing<br />organisations<br /> and federations</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>International <ul><li><a href="/wiki/AIDA_International" title="AIDA International">AIDA International</a></li> <li><a href="/wiki/Conf%C3%A9d%C3%A9ration_Mondiale_des_Activit%C3%A9s_Subaquatiques" title="Confédération Mondiale des Activités Subaquatiques">Confédération Mondiale des Activités Subaquatiques</a>)</li></ul></li> <li>National <ul><li><a href="/wiki/AIDA_Hellas" title="AIDA Hellas">AIDA Hellas</a></li> <li><a href="/wiki/Australian_Underwater_Federation" title="Australian Underwater Federation">Australian Underwater Federation</a></li> <li><a href="/wiki/British_Freediving_Association" title="British Freediving Association">British Freediving Association</a></li> <li><a href="/wiki/British_Octopush_Association" title="British Octopush Association">British Octopush Association</a></li> <li><a href="/wiki/British_Underwater_Sports_Association" title="British Underwater Sports Association">British Underwater Sports Association</a></li> <li><a href="/wiki/Comhairle_Fo-Thuinn" title="Comhairle Fo-Thuinn">Comhairle Fo-Thuinn</a></li> <li><a href="/wiki/Federaci%C3%B3n_Espa%C3%B1ola_de_Actividades_Subacu%C3%A1ticas" title="Federación Española de Actividades Subacuáticas">Federación Española de Actividades Subacuáticas</a></li> <li><a href="/wiki/French_federation_of_underwater_studies_and_sports" class="mw-redirect" title="French federation of underwater studies and sports">Fédération Française d'Études et de Sports Sous-Marins</a></li> <li><a href="/wiki/South_African_Underwater_Sports_Federation" title="South African Underwater Sports Federation">South African Underwater Sports Federation</a></li> <li><a href="/wiki/Turkish_Underwater_Sports_Federation" title="Turkish Underwater Sports Federation">Türkiye Sualtı Sporları Federasyonu</a></li> <li><a href="/wiki/Underwater_Society_of_America" title="Underwater Society of America">Underwater Society of America</a>)</li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Competitions</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/14th_CMAS_Underwater_Photography_World_Championship" title="14th CMAS Underwater Photography World Championship">14th CMAS Underwater Photography World Championship</a></li> <li><a href="/wiki/Underwater_Hockey_World_Championships" title="Underwater Hockey World Championships">Underwater Hockey World Championships</a></li> <li><a href="/wiki/Underwater_Orienteering_World_Championships" title="Underwater Orienteering World Championships">Underwater Orienteering World Championships</a></li> <li><a href="/wiki/Underwater_Rugby_World_Championships" title="Underwater Rugby World Championships">Underwater Rugby World Championships</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Underwater_divers" style="font-size:114%;margin:0 4em"><a href="/wiki/Outline_of_underwater_divers" title="Outline of underwater divers">Underwater divers</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Pioneers<br />of diving</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Eduard_Admetlla_i_L%C3%A1zaro" title="Eduard Admetlla i Lázaro">Eduard Admetlla i Lázaro</a></li> <li><a href="/wiki/Aquanaut" title="Aquanaut">Aquanaut</a></li> <li><a href="/wiki/Mary_Bonnin" title="Mary Bonnin">Mary Bonnin</a></li> <li><a href="/wiki/Amelia_Behrens-Furniss" title="Amelia Behrens-Furniss">Amelia Behrens-Furniss</a></li> <li><a href="/wiki/James_F._Cahill" title="James F. Cahill">James F. Cahill</a></li> <li><a href="/wiki/Jacques_Cousteau" title="Jacques Cousteau">Jacques Cousteau</a></li> <li><a href="/wiki/Billy_Deans_(diver)" title="Billy Deans (diver)">Billy Deans</a></li> <li><a href="/wiki/Dottie_Frazier" title="Dottie Frazier">Dottie Frazier</a></li> <li><a href="/wiki/Trevor_Hampton" title="Trevor Hampton">Trevor Hampton</a></li> <li><a href="/wiki/Hans_Hass" title="Hans Hass">Hans Hass</a></li> <li><a href="/wiki/Dick_Rutkowski" title="Dick Rutkowski">Dick Rutkowski</a></li> <li><a href="/wiki/Teseo_Tesei" title="Teseo Tesei">Teseo Tesei</a></li> <li><a href="/wiki/Arne_Zetterstr%C3%B6m" title="Arne Zetterström">Arne Zetterström</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Underwater<br />scientists<br />archaeologists and<br />environmentalists</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Michael_Arbuthnot" title="Michael Arbuthnot">Michael Arbuthnot</a></li> <li><a href="/wiki/Robert_Ballard" title="Robert Ballard">Robert Ballard</a></li> <li><a href="/wiki/George_Bass_(archaeologist)" title="George Bass (archaeologist)">George Bass</a></li> <li><a href="/wiki/Mensun_Bound" title="Mensun Bound">Mensun Bound</a></li> <li><a href="/wiki/Louis_Boutan" title="Louis Boutan">Louis Boutan</a></li> <li><a href="/wiki/Jeffrey_Bozanic" title="Jeffrey Bozanic">Jeffrey Bozanic</a></li> <li><a href="/wiki/Hugh_Bradner" title="Hugh Bradner">Hugh Bradner</a></li> <li><a href="/wiki/Cathy_Church" title="Cathy Church">Cathy Church</a></li> <li><a href="/wiki/Eugenie_Clark" title="Eugenie Clark">Eugenie Clark</a></li> <li><a href="/wiki/James_P._Delgado" title="James P. Delgado">James P. Delgado</a></li> <li><a href="/wiki/Sylvia_Earle" title="Sylvia Earle">Sylvia Earle</a></li> <li><a href="/wiki/John_Christopher_Fine" title="John Christopher Fine">John Christopher Fine</a></li> <li><a href="/wiki/George_R._Fischer" title="George R. Fischer">George R. Fischer</a></li> <li><a href="/wiki/Anders_Franz%C3%A9n" title="Anders Franzén">Anders Franzén</a></li> <li><a href="/wiki/Honor_Frost" title="Honor Frost">Honor Frost</a></li> <li><a href="/wiki/Fernando_Garfella_Palmer" title="Fernando Garfella Palmer">Fernando Garfella Palmer</a></li> <li><a href="/wiki/David_Gibbins" title="David Gibbins">David Gibbins</a></li> <li><a href="/wiki/Graham_Jessop" title="Graham Jessop">Graham Jessop</a></li> <li><a href="/wiki/Swietenia_Puspa_Lestari" title="Swietenia Puspa Lestari">Swietenia Puspa Lestari</a></li> <li><a href="/wiki/Pilar_Luna" title="Pilar Luna">Pilar Luna</a></li> <li><a href="/wiki/Robert_F._Marx" title="Robert F. Marx">Robert F. Marx</a></li> <li><a href="/wiki/Anna_Marguerite_McCann" title="Anna Marguerite McCann">Anna Marguerite McCann</a></li> <li><a href="/wiki/Innes_McCartney" title="Innes McCartney">Innes McCartney</a></li> <li><a href="/wiki/Charles_T._Meide" title="Charles T. Meide">Charles T. Meide</a></li> <li><a href="/wiki/Mark_M._Newell" title="Mark M. Newell">Mark M. Newell</a></li> <li><a href="/wiki/Lyuba_Ognenova-Marinova" title="Lyuba Ognenova-Marinova">Lyuba Ognenova-Marinova</a></li> <li><a href="/wiki/John_Peter_Oleson" title="John Peter Oleson">John Peter Oleson</a></li> <li><a href="/wiki/Mendel_L._Peterson" title="Mendel L. Peterson">Mendel L. Peterson</a></li> <li><a href="/wiki/Richard_Pyle" title="Richard Pyle">Richard Pyle</a></li> <li><a href="/wiki/Andreas_Rechnitzer" title="Andreas Rechnitzer">Andreas Rechnitzer</a></li> <li><a href="/wiki/William_R._Royal" title="William R. Royal">William R. Royal</a></li> <li><a href="/wiki/Margaret_Rule" title="Margaret Rule">Margaret Rule</a></li> <li><a href="/wiki/Gunter_Sch%C3%B6bel" title="Gunter Schöbel">Gunter Schöbel</a></li> <li><a href="/wiki/Stephanie_Schwabe" title="Stephanie Schwabe">Stephanie Schwabe</a></li> <li><a href="/wiki/Myriam_Seco" title="Myriam Seco">Myriam Seco</a></li> <li><a href="/wiki/E._Lee_Spence" title="E. Lee Spence">E. Lee Spence</a></li> <li><a href="/wiki/Robert_St%C3%A9nuit" title="Robert Sténuit">Robert Sténuit</a></li> <li><a href="/wiki/Peter_Throckmorton" title="Peter Throckmorton">Peter Throckmorton</a></li> <li><a href="/wiki/Cristina_Zenato" title="Cristina Zenato">Cristina Zenato</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Scuba record<br />holders</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Pascal_Bernab%C3%A9" title="Pascal Bernabé">Pascal Bernabé</a></li> <li><a href="/wiki/Jim_Bowden_(diver)" title="Jim Bowden (diver)">Jim Bowden</a></li> <li><a href="/wiki/Mark_Ellyatt" title="Mark Ellyatt">Mark Ellyatt</a></li> <li><a href="/wiki/Sheck_Exley" title="Sheck Exley">Sheck Exley</a></li> <li><a href="/wiki/Nuno_Gomes_(diver)" title="Nuno Gomes (diver)">Nuno Gomes</a></li> <li><a href="/wiki/Claudia_Serpieri" title="Claudia Serpieri">Claudia Serpieri</a></li> <li><a href="/wiki/Krzysztof_Starnawski" title="Krzysztof Starnawski">Krzysztof Starnawski</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Underwater<br />filmmakers<br />and presenters</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Samir_Alhafith" title="Samir Alhafith">Samir Alhafith</a></li> <li><a href="/wiki/David_Attenborough" title="David Attenborough">David Attenborough</a></li> <li><a href="/wiki/Ram%C3%B3n_Bravo" title="Ramón Bravo">Ramón Bravo</a></li> <li><a href="/wiki/Jean-Michel_Cousteau" title="Jean-Michel Cousteau">Jean-Michel Cousteau</a></li> <li><a href="/wiki/Richie_Kohler" title="Richie Kohler">Richie Kohler</a></li> <li><a href="/wiki/Paul_Rose_(TV_presenter)" title="Paul Rose (TV presenter)">Paul Rose</a></li> <li><a href="/wiki/Andy_Torbet" title="Andy Torbet">Andy Torbet</a></li> <li><a href="/wiki/Ivan_Tors" title="Ivan Tors">Ivan Tors</a></li> <li><a href="/wiki/Andrew_Wight" title="Andrew Wight">Andrew Wight</a></li> <li><a href="/wiki/James_Cameron" title="James Cameron">James Cameron</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Underwater<br />photographers</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Doug_Allan" title="Doug Allan">Doug Allan</a></li> <li><a href="/wiki/Tamara_Benitez" title="Tamara Benitez">Tamara Benitez</a></li> <li><a href="/wiki/Georges_Beuchat" title="Georges Beuchat">Georges Beuchat</a></li> <li><a href="/wiki/Adrian_Biddle" title="Adrian Biddle">Adrian Biddle</a></li> <li><a href="/wiki/Jonathan_Bird" title="Jonathan Bird">Jonathan Bird</a></li> <li><a href="/wiki/Eric_Cheng" title="Eric Cheng">Eric Cheng</a></li> <li><a href="/wiki/Neville_Coleman" title="Neville Coleman">Neville Coleman</a></li> <li><a href="/wiki/Jacques_Cousteau" title="Jacques Cousteau">Jacques Cousteau</a></li> <li><a href="/wiki/John_D._Craig" title="John D. Craig">John D. Craig</a></li> <li><a href="/wiki/Ben_Cropp" title="Ben Cropp">Ben Cropp</a></li> <li><a href="/wiki/Bernard_Delemotte" title="Bernard Delemotte">Bernard Delemotte</a></li> <li><a href="/wiki/David_Doubilet" title="David Doubilet">David Doubilet</a></li> <li><a href="/wiki/Candice_Farmer" title="Candice Farmer">Candice Farmer</a></li> <li><a href="/wiki/John_Christopher_Fine" title="John Christopher Fine">John Christopher Fine</a></li> <li><a href="/wiki/Rodney_Fox" title="Rodney Fox">Rodney Fox</a></li> <li><a href="/wiki/Ric_Frazier" title="Ric Frazier">Ric Frazier</a></li> <li><a href="/wiki/Stephen_Frink" title="Stephen Frink">Stephen Frink</a></li> <li><a href="/wiki/Peter_Gimbel" title="Peter Gimbel">Peter Gimbel</a></li> <li><a href="/wiki/Monty_Halls" title="Monty Halls">Monty Halls</a></li> <li><a href="/wiki/Hans_Hass" title="Hans Hass">Hans Hass</a></li> <li><a href="/wiki/Henry_Way_Kendall" title="Henry Way Kendall">Henry Way Kendall</a></li> <li><a href="/wiki/Rudie_Kuiter" class="mw-redirect" title="Rudie Kuiter">Rudie Kuiter</a></li> <li><a href="/wiki/Joseph_B._MacInnis" title="Joseph B. MacInnis">Joseph B. MacInnis</a></li> <li><a href="/wiki/Luis_Marden" title="Luis Marden">Luis Marden</a></li> <li><a href="/wiki/Agnes_Milowka" title="Agnes Milowka">Agnes Milowka</a></li> <li><a href="/wiki/Noel_Monkman" title="Noel Monkman">Noel Monkman</a></li> <li><a href="/wiki/Pete_Oxford" title="Pete Oxford">Pete Oxford</a></li> <li><a href="/wiki/Steve_Parish" title="Steve Parish">Steve Parish</a></li> <li><a href="/wiki/Zale_Parry" title="Zale Parry">Zale Parry</a></li> <li><a href="/wiki/Pierre_Petit_(photographer)" title="Pierre Petit (photographer)">Pierre Petit</a></li> <li><a href="/wiki/Leni_Riefenstahl" title="Leni Riefenstahl">Leni Riefenstahl</a></li> <li><a href="/wiki/Peter_Scoones" title="Peter Scoones">Peter Scoones</a></li> <li><a href="/wiki/Brian_Skerry" title="Brian Skerry">Brian Skerry</a></li> <li><a href="/wiki/Wesley_C._Skiles" title="Wesley C. Skiles">Wesley C. Skiles</a></li> <li><a href="/wiki/E._Lee_Spence" title="E. Lee Spence">E. Lee Spence</a></li> <li><a href="/wiki/Philippe_Tailliez" title="Philippe Tailliez">Philippe Tailliez</a></li> <li><a href="/wiki/Ron_Taylor_(diver)" title="Ron Taylor (diver)">Ron Taylor</a></li> <li><a href="/wiki/Valerie_Taylor_(diver)" title="Valerie Taylor (diver)">Valerie Taylor</a></li> <li><a href="/wiki/Albert_Tillman" title="Albert Tillman">Albert Tillman</a></li> <li><a href="/wiki/John_Veltri" title="John Veltri">John Veltri</a></li> <li><a href="/wiki/Stan_Waterman" title="Stan Waterman">Stan Waterman</a></li> <li><a href="/wiki/Michele_Westmorland" title="Michele Westmorland">Michele Westmorland</a></li> <li><a href="/wiki/John_Ernest_Williamson" title="John Ernest Williamson">John Ernest Williamson</a></li> <li><a href="/wiki/J._Lamar_Worzel" title="J. Lamar Worzel">J. Lamar Worzel</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Underwater<br />explorers</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Caves <ul><li><a href="/wiki/Graham_Balcombe" title="Graham Balcombe">Graham Balcombe</a></li> <li><a href="/wiki/Sheck_Exley" title="Sheck Exley">Sheck Exley</a></li> <li><a href="/wiki/Martyn_Farr" title="Martyn Farr">Martyn Farr</a></li> <li><a href="/wiki/Jochen_Hasenmayer" title="Jochen Hasenmayer">Jochen Hasenmayer</a></li> <li><a href="/wiki/Jill_Heinerth" title="Jill Heinerth">Jill Heinerth</a></li> <li><a href="/wiki/Jarrod_Jablonski" title="Jarrod Jablonski">Jarrod Jablonski</a></li> <li><a href="/wiki/William_Hogarth_Main" title="William Hogarth Main">William Hogarth Main</a></li> <li><a href="/wiki/Tom_Mount" title="Tom Mount">Tom Mount</a></li> <li><a href="/wiki/Jack_Sheppard_(cave_diver)" title="Jack Sheppard (cave diver)">Jack Sheppard</a></li> <li><a href="/wiki/William_Stone_(caver)" title="William Stone (caver)">Bill Stone</a></li></ul></li> <li>Reefs <ul><li><a href="/wiki/Arthur_C._Clarke" title="Arthur C. Clarke">Arthur C. Clarke</a></li></ul></li> <li>Wrecks <ul><li><a href="/wiki/Leigh_Bishop" title="Leigh Bishop">Leigh Bishop</a></li> <li><a href="/wiki/John_Chatterton" title="John Chatterton">John Chatterton</a></li> <li><a href="/wiki/Clive_Cussler" title="Clive Cussler">Clive Cussler</a></li> <li><a href="/wiki/Bill_Nagle" title="Bill Nagle">Bill Nagle</a></li> <li><a href="/wiki/Valerie_van_Heest" title="Valerie van Heest">Valerie van Heest</a></li> <li><a href="/wiki/Aristotelis_Zervoudis" title="Aristotelis Zervoudis">Aristotelis Zervoudis</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Aquanaut" title="Aquanaut">Aquanauts</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Andrew_Abercromby" title="Andrew Abercromby">Andrew Abercromby</a></li> <li><a href="/wiki/Joseph_M._Acaba" title="Joseph M. Acaba">Joseph M. Acaba</a></li> <li><a href="/wiki/Clayton_Anderson" title="Clayton Anderson">Clayton Anderson</a></li> <li><a href="/wiki/Richard_R._Arnold" title="Richard R. Arnold">Richard R. Arnold</a></li> <li><a href="/wiki/Serena_Au%C3%B1%C3%B3n-Chancellor" title="Serena Auñón-Chancellor">Serena Auñón-Chancellor</a></li> <li><a href="/wiki/Michael_Barratt_(astronaut)" title="Michael Barratt (astronaut)">Michael Barratt (astronaut)</a></li> <li><a href="/wiki/Robert_A._Barth" title="Robert A. Barth">Robert A. Barth</a></li> <li><a href="/wiki/Bob_Behnken" title="Bob Behnken">Robert L. Behnken</a></li> <li><a href="/wiki/Randolph_Bresnik" title="Randolph Bresnik">Randolph Bresnik</a></li> <li><a href="/wiki/Timothy_J._Broderick" title="Timothy J. Broderick">Timothy J. Broderick</a></li> <li><a href="/wiki/Justin_Brown_(aquanaut)" title="Justin Brown (aquanaut)">Justin Brown</a></li> <li><a href="/wiki/Berry_L._Cannon" title="Berry L. Cannon">Berry L. Cannon</a></li> <li><a href="/wiki/Scott_Carpenter" title="Scott Carpenter">Scott Carpenter</a></li> <li><a href="/wiki/Gregory_Chamitoff" title="Gregory Chamitoff">Gregory Chamitoff</a></li> <li><a href="/wiki/Steve_Chappell" title="Steve Chappell">Steve Chappell</a></li> <li><a href="/wiki/Catherine_Coleman" title="Catherine Coleman">Catherine Coleman</a></li> <li><a href="/wiki/Robin_Cook_(American_novelist)" title="Robin Cook (American novelist)">Robin Cook</a></li> <li><a href="/wiki/Craig_B._Cooper" title="Craig B. Cooper">Craig B. Cooper</a></li> <li><a href="/wiki/Fabien_Cousteau" title="Fabien Cousteau">Fabien Cousteau</a></li> <li><a href="/wiki/Philippe_Cousteau" title="Philippe Cousteau">Philippe Cousteau</a></li> <li><a href="/wiki/Timothy_Creamer" title="Timothy Creamer">Timothy Creamer</a></li> <li><a href="/wiki/Jonathan_Dory" title="Jonathan Dory">Jonathan Dory</a></li> <li><a href="/wiki/Pedro_Duque" title="Pedro Duque">Pedro Duque</a></li> <li><a href="/wiki/Sylvia_Earle" title="Sylvia Earle">Sylvia Earle</a></li> <li><a href="/wiki/Jeanette_Epps" title="Jeanette Epps">Jeanette Epps</a></li> <li><a href="/wiki/Sheck_Exley" title="Sheck Exley">Sheck Exley</a></li> <li><a href="/wiki/Albert_Falco" title="Albert Falco">Albert Falco</a></li> <li><a href="/wiki/Andrew_J._Feustel" title="Andrew J. Feustel">Andrew J. Feustel</a></li> <li><a href="/wiki/Michael_Fincke" title="Michael Fincke">Michael Fincke</a></li> <li><a href="/wiki/Satoshi_Furukawa" title="Satoshi Furukawa">Satoshi Furukawa</a></li> <li><a href="/wiki/Ronald_J._Garan_Jr." title="Ronald J. Garan Jr.">Ronald J. Garan Jr.</a></li> <li><a href="/wiki/Michael_L._Gernhardt" title="Michael L. Gernhardt">Michael L. Gernhardt</a></li> <li><a href="/wiki/Christopher_E._Gerty" title="Christopher E. Gerty">Christopher E. Gerty</a></li> <li><a href="/wiki/David_Gruber" title="David Gruber">David Gruber</a></li> <li><a href="/wiki/Chris_Hadfield" title="Chris Hadfield">Chris Hadfield</a></li> <li><a href="/wiki/Jeremy_Hansen" title="Jeremy Hansen">Jeremy Hansen</a></li> <li><a href="/wiki/Jos%C3%A9_M._Hern%C3%A1ndez" title="José M. Hernández">José M. Hernández</a></li> <li><a href="/wiki/John_Herrington" title="John Herrington">John Herrington</a></li> <li><a href="/wiki/Paul_Hill_(flight_director)" title="Paul Hill (flight director)">Paul Hill</a></li> <li><a href="/wiki/Akihiko_Hoshide" title="Akihiko Hoshide">Akihiko Hoshide</a></li> <li><a href="/wiki/Mark_Hulsbeck" title="Mark Hulsbeck">Mark Hulsbeck</a></li> <li><a href="/wiki/Emma_Hwang" title="Emma Hwang">Emma Hwang</a></li> <li><a href="/wiki/Norishige_Kanai" title="Norishige Kanai">Norishige Kanai</a></li> <li><a href="/wiki/Les_Kaufman" title="Les Kaufman">Les Kaufman</a></li> <li><a href="/wiki/Scott_Kelly_(astronaut)" title="Scott Kelly (astronaut)">Scott Kelly</a></li> <li><a href="/wiki/Karen_Kohanowich" title="Karen Kohanowich">Karen Kohanowich</a></li> <li><a href="/wiki/Timothy_Kopra" title="Timothy Kopra">Timothy Kopra</a></li> <li><a href="/wiki/Dominic_Landucci" title="Dominic Landucci">Dominic Landucci</a></li> <li><a href="/wiki/Jon_Lindbergh" title="Jon Lindbergh">Jon Lindbergh</a></li> <li><a href="/wiki/Kjell_N._Lindgren" title="Kjell N. Lindgren">Kjell N. Lindgren</a></li> <li><a href="/wiki/Michael_L%C3%B3pez-Alegr%C3%ADa" title="Michael López-Alegría">Michael López-Alegría</a></li> <li><a href="/wiki/Joseph_B._MacInnis" title="Joseph B. MacInnis">Joseph B. MacInnis</a></li> <li><a href="/wiki/Sandra_Magnus" title="Sandra Magnus">Sandra Magnus</a></li> <li><a href="/wiki/Thomas_Marshburn" title="Thomas Marshburn">Thomas Marshburn</a></li> <li><a href="/wiki/Matthias_Maurer" title="Matthias Maurer">Matthias Maurer</a></li> <li><a href="/wiki/K._Megan_McArthur" title="K. Megan McArthur">K. Megan McArthur</a></li> <li><a href="/wiki/Craig_McKinley_(physician)" title="Craig McKinley (physician)">Craig McKinley</a></li> <li><a href="/wiki/Jessica_Meir" title="Jessica Meir">Jessica Meir</a></li> <li><a href="/wiki/Simone_Melchior" title="Simone Melchior">Simone Melchior</a></li> <li><a href="/wiki/Dorothy_Metcalf-Lindenburger" title="Dorothy Metcalf-Lindenburger">Dorothy Metcalf-Lindenburger</a></li> <li><a href="/wiki/Andreas_Mogensen" title="Andreas Mogensen">Andreas Mogensen</a></li> <li><a href="/wiki/Karen_Nyberg" title="Karen Nyberg">Karen Nyberg</a></li> <li><a href="/wiki/John_D._Olivas" title="John D. Olivas">John D. Olivas</a></li> <li><a href="/wiki/Takuya_Onishi" title="Takuya Onishi">Takuya Onishi</a></li> <li><a href="/wiki/Luca_Parmitano" title="Luca Parmitano">Luca Parmitano</a></li> <li><a href="/wiki/Nicholas_Patrick" title="Nicholas Patrick">Nicholas Patrick</a></li> <li><a href="/wiki/Tim_Peake" title="Tim Peake">Tim Peake</a></li> <li><a href="/wiki/Thomas_Pesquet" title="Thomas Pesquet">Thomas Pesquet</a></li> <li><a href="/wiki/Marc_Reagan" title="Marc Reagan">Marc Reagan</a></li> <li><a href="/wiki/Garrett_Reisman" title="Garrett Reisman">Garrett Reisman</a></li> <li><a href="/wiki/Kathleen_Rubins" title="Kathleen Rubins">Kathleen Rubins</a></li> <li><a href="/wiki/Dick_Rutkowski" title="Dick Rutkowski">Dick Rutkowski</a></li> <li><a href="/wiki/Tara_Ruttley" title="Tara Ruttley">Tara Ruttley</a></li> <li><a href="/wiki/David_Saint-Jacques" title="David Saint-Jacques">David Saint-Jacques</a></li> <li><a href="/wiki/Josef_Schmid_(flight_surgeon)" title="Josef Schmid (flight surgeon)">Josef Schmid</a></li> <li><a href="/wiki/Robert_Sheats" title="Robert Sheats">Robert Sheats</a></li> <li><a href="/wiki/Dewey_Smith" title="Dewey Smith">Dewey Smith</a></li> <li><a href="/wiki/Steve_Squyres" title="Steve Squyres">Steve Squyres</a></li> <li><a href="/wiki/Heidemarie_Stefanyshyn-Piper" title="Heidemarie Stefanyshyn-Piper">Heidemarie Stefanyshyn-Piper</a></li> <li><a href="/wiki/Robert_St%C3%A9nuit" title="Robert Sténuit">Robert Sténuit</a></li> <li><a href="/wiki/Herv%C3%A9_Stevenin" title="Hervé Stevenin">Hervé Stevenin</a></li> <li><a href="/wiki/Nicole_Stott" title="Nicole Stott">Nicole Stott</a></li> <li><a href="/wiki/James_Talacek" title="James Talacek">James Talacek</a></li> <li><a href="/wiki/Daniel_M._Tani" title="Daniel M. Tani">Daniel M. Tani</a></li> <li><a href="/wiki/Robert_Thirsk" title="Robert Thirsk">Robert Thirsk</a></li> <li><a href="/wiki/Bill_Todd" title="Bill Todd">Bill Todd</a></li> <li><a href="/wiki/Mark_T._Vande_Hei" title="Mark T. Vande Hei">Mark T. Vande Hei</a></li> <li><a href="/wiki/Koichi_Wakata" title="Koichi Wakata">Koichi Wakata</a></li> <li><a href="/wiki/Rex_J._Walheim" title="Rex J. Walheim">Rex J. Walheim</a></li> <li><a href="/wiki/Shannon_Walker" title="Shannon Walker">Shannon Walker</a></li> <li><a href="/wiki/John_Morgan_Wells" title="John Morgan Wells">John Morgan Wells</a></li> <li><a href="/wiki/Joachim_Wendler" title="Joachim Wendler">Joachim Wendler</a></li> <li><a href="/wiki/Douglas_H._Wheelock" title="Douglas H. Wheelock">Douglas H. Wheelock</a></li> <li><a href="/wiki/Peggy_Whitson" title="Peggy Whitson">Peggy Whitson</a></li> <li><a href="/wiki/Dafydd_Williams" title="Dafydd Williams">Dafydd Williams</a></li> <li><a href="/wiki/Jeffrey_Williams_(astronaut)" title="Jeffrey Williams (astronaut)">Jeffrey Williams</a></li> <li><a href="/wiki/Sunita_Williams" title="Sunita Williams">Sunita Williams</a></li> <li><a href="/wiki/Reid_Wiseman" title="Reid Wiseman">Reid Wiseman</a></li> <li><a href="/wiki/Kimiya_Yui" title="Kimiya Yui">Kimiya Yui</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Writers and journalists</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Michael_C._Barnette" title="Michael C. Barnette">Michael C. Barnette</a></li> <li><a href="/wiki/Victor_Berge" title="Victor Berge">Victor Berge</a></li> <li><a href="/wiki/Philippe_Diol%C3%A9" title="Philippe Diolé">Philippe Diolé</a></li> <li><a href="/wiki/Gary_Gentile" title="Gary Gentile">Gary Gentile</a></li> <li><a href="/wiki/Bret_Gilliam" title="Bret Gilliam">Bret Gilliam</a></li> <li><a href="/wiki/Bob_Halstead" title="Bob Halstead">Bob Halstead</a></li> <li><a href="/wiki/Hillary_Hauser" title="Hillary Hauser">Hillary Hauser</a></li> <li><a href="/wiki/Trevor_Jackson_(diver)" title="Trevor Jackson (diver)">Trevor Jackson</a></li> <li><a href="/wiki/Steve_Lewis_(diver)" title="Steve Lewis (diver)">Steve Lewis</a></li> <li><a href="/wiki/John_Mattera" title="John Mattera">John Mattera</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Rescuers</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Craig_Challen" title="Craig Challen">Craig Challen</a></li> <li><a href="/wiki/Richard_Harris_(anaesthetist)" title="Richard Harris (anaesthetist)">Richard Harris</a></li> <li><a href="/wiki/Rick_Stanton" title="Rick Stanton">Rick Stanton</a></li> <li><a href="/wiki/John_Volanthen" title="John Volanthen">John Volanthen</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Frogmen</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Lionel_Crabb" title="Lionel Crabb">Lionel Crabb</a></li> <li><a href="/wiki/Ian_Edward_Fraser" title="Ian Edward Fraser">Ian Edward Fraser</a></li> <li><a href="/wiki/Sydney_Knowles" title="Sydney Knowles">Sydney Knowles</a></li> <li><a href="/wiki/James_Joseph_Magennis" title="James Joseph Magennis">James Joseph Magennis</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Commercial salvors</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Keith_Jessop" title="Keith Jessop">Keith Jessop</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible uncollapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Science_of_underwater_diving" style="font-size:114%;margin:0 4em"><a href="/wiki/Science_of_underwater_diving" title="Science of underwater diving">Science of underwater diving</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_researchers_in_underwater_diving" title="List of researchers in underwater diving">List of researchers in underwater diving</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Diving_physics" title="Diving physics">Diving<br />physics</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Metre_sea_water" title="Metre sea water">Metre sea water</a></li> <li><a href="/wiki/Neutral_buoyancy" title="Neutral buoyancy">Neutral buoyancy</a></li> <li><a href="/wiki/Underwater_acoustics" title="Underwater acoustics">Underwater acoustics</a> <ul><li><a href="/wiki/Modulated_ultrasound" title="Modulated ultrasound">Modulated ultrasound</a></li></ul></li> <li><a href="/wiki/Underwater_vision" title="Underwater vision">Underwater vision</a> <ul><li><a href="/wiki/Underwater_computer_vision" title="Underwater computer vision">Underwater computer vision</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Diving_physiology" class="mw-redirect" title="Diving physiology">Diving<br />physiology</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Diving_reflex#Blood_shift" title="Diving reflex">Blood shift</a></li> <li><a href="/wiki/Cold_shock_response" title="Cold shock response">Cold shock response</a></li> <li><a href="/wiki/Diving_reflex" title="Diving reflex">Diving reflex</a></li> <li><a href="/wiki/Equivalent_narcotic_depth" title="Equivalent narcotic depth">Equivalent narcotic depth</a></li> <li><a href="/wiki/Maximum_operating_depth" title="Maximum operating depth">Maximum operating depth</a></li> <li><a href="/wiki/Physiological_response_to_water_immersion" class="mw-redirect" title="Physiological response to water immersion">Physiological response to water immersion</a></li> <li><a href="/wiki/Thermal_balance_of_the_underwater_diver" title="Thermal balance of the underwater diver">Thermal balance of the underwater diver</a></li> <li><a href="/wiki/Underwater_vision" title="Underwater vision">Underwater vision</a></li> <li><a href="/wiki/Work_of_breathing" title="Work of breathing">Work of breathing</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Decompressiontheory" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Decompression_theory" title="Decompression theory">Decompression<br />theory</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Decompression models: <ul><li><a href="/wiki/B%C3%BChlmann_decompression_algorithm" title="Bühlmann decompression algorithm">Bühlmann decompression algorithm</a></li> <li><a href="/wiki/Haldane%27s_decompression_model" title="Haldane's decompression model">Haldane's decompression model</a></li> <li><a href="/wiki/Reduced_gradient_bubble_model" title="Reduced gradient bubble model">Reduced gradient bubble model</a></li> <li><a href="/wiki/Thalmann_algorithm" title="Thalmann algorithm">Thalmann algorithm</a></li> <li><a href="/wiki/Thermodynamic_model_of_decompression" title="Thermodynamic model of decompression">Thermodynamic model of decompression</a></li> <li><a href="/wiki/Varying_Permeability_Model" title="Varying Permeability Model">Varying Permeability Model</a></li></ul></li> <li><a href="/wiki/Equivalent_air_depth" title="Equivalent air depth">Equivalent air depth</a></li> <li><a href="/wiki/Oxygen_window" title="Oxygen window">Oxygen window</a></li> <li><a href="/wiki/Physiology_of_decompression" title="Physiology of decompression">Physiology of decompression</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Underwater_diving_environment" title="Underwater diving environment">Diving<br />environments</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Underwater_exploration" title="Underwater exploration">Underwater exploration</a> <ul><li><a href="/wiki/Deep-sea_exploration" title="Deep-sea exploration">Deep-sea exploration</a></li></ul></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Classification</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_diving_environments_by_type" title="List of diving environments by type">List of diving environments by type</a></li> <li><a href="/wiki/Altitude_diving" title="Altitude diving">Altitude diving</a></li> <li><a href="/wiki/Benign_water_diving" class="mw-redirect" title="Benign water diving">Benign water diving</a></li> <li><a href="/wiki/Confined_water_diving" class="mw-redirect" title="Confined water diving">Confined water diving</a></li> <li><a href="/wiki/Deep_diving" title="Deep diving">Deep diving</a></li> <li><a href="/wiki/Inland_diving" class="mw-redirect" title="Inland diving">Inland diving</a></li> <li><a href="/wiki/Inshore_diving" class="mw-redirect" title="Inshore diving">Inshore diving</a></li> <li><a href="/wiki/Muck_diving" title="Muck diving">Muck diving</a></li> <li><a href="/wiki/Night_diving" title="Night diving">Night diving</a></li> <li><a href="/wiki/Open-water_diving" title="Open-water diving">Open-water diving</a> <ul><li><a href="/wiki/Black-water_diving" class="mw-redirect" title="Black-water diving">Black-water diving</a></li> <li><a href="/wiki/Blue-water_diving" class="mw-redirect" title="Blue-water diving">Blue-water diving</a></li></ul></li> <li><a href="/wiki/Penetration_diving" title="Penetration diving">Penetration diving</a> <ul><li><a href="/wiki/Cave_diving" title="Cave diving">Cave diving</a> <ul><li><a href="/wiki/Torricellian_chamber" title="Torricellian chamber">Torricellian chamber</a></li></ul></li> <li><a href="/wiki/Ice_diving" title="Ice diving">Ice diving</a></li> <li><a href="/wiki/Wreck_diving" title="Wreck diving">Wreck diving</a></li></ul></li> <li><a href="/wiki/Recreational_dive_sites" title="Recreational dive sites">Recreational dive sites</a></li> <li><a class="mw-selflink selflink">Underwater environment</a></li> <li><a href="/wiki/Underwater_diving_environment" title="Underwater diving environment">Underwater diving environment</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Impact</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Environmental_impact_of_recreational_diving" title="Environmental impact of recreational diving">Environmental impact of recreational diving</a></li> <li><a href="/wiki/Low_impact_diving" title="Low impact diving">Low impact diving</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr></tbody></table><div> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Other" style="font-size:114%;margin:0 4em">Other</div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bathysphere" title="Bathysphere">Bathysphere</a></li> <li><a href="/wiki/Defense_against_swimmer_incursions" title="Defense against swimmer incursions">Defense against swimmer incursions</a> <ul><li><a href="/wiki/Diver_detection_sonar" title="Diver detection sonar">Diver detection sonar</a></li></ul></li> <li><a href="/wiki/Offshore_survey" class="mw-redirect" title="Offshore survey">Offshore survey</a></li> <li><a href="/wiki/Rugged_compact_camera" class="mw-redirect" title="Rugged compact camera">Rugged compact camera</a></li> <li><a href="/wiki/Underwater_domain_awareness" title="Underwater domain awareness">Underwater domain awareness</a></li> <li><a href="/wiki/Underwater_vehicle" title="Underwater vehicle">Underwater vehicle</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Deep-submergence_vehicle" title="Deep-submergence vehicle">Deep-submergence<br />vehicle</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aluminaut" title="Aluminaut"><i>Aluminaut</i></a></li> <li><a href="/wiki/DSV_Alvin" title="DSV Alvin">DSV <i>Alvin</i></a></li> <li><a href="/wiki/American_submarine_NR-1" title="American submarine NR-1">American submarine NR-1</a></li> <li><a href="/wiki/Bathyscaphe" title="Bathyscaphe">Bathyscaphe</a> <ul><li><a href="/wiki/Archim%C3%A8de" title="Archimède"><i>Archimède</i></a></li> <li><a href="/wiki/FNRS-2" title="FNRS-2">FNRS-2</a></li> <li><a href="/wiki/FNRS-3" title="FNRS-3">FNRS-3</a></li> <li><a href="/wiki/Sea_Pole-class_bathyscaphe#Harmony_class_bathyscaphe" title="Sea Pole-class bathyscaphe"><i>Harmony</i> class bathyscaphe</a></li> <li><a href="/wiki/Sea_Pole-class_bathyscaphe" title="Sea Pole-class bathyscaphe"><i>Sea Pole</i>-class bathyscaphe</a></li> <li><a href="/wiki/Bathyscaphe_Trieste_II" class="mw-redirect" title="Bathyscaphe Trieste II"><i>Trieste II</i></a></li></ul></li> <li><a href="/wiki/Deepsea_Challenger" title="Deepsea Challenger"><i>Deepsea Challenger</i></a></li> <li><a href="/wiki/Ictineu_3" title="Ictineu 3"><i>Ictineu 3</i></a></li> <li><a href="/wiki/JAGO_(German_research_submersible)" title="JAGO (German research submersible)"><i>JAGO</i></a></li> <li><a href="/wiki/Jiaolong_(submersible)" title="Jiaolong (submersible)"><i>Jiaolong</i></a></li> <li><a href="/wiki/Konsul-class_submersible" title="Konsul-class submersible"><i>Konsul</i>-class submersible</a></li> <li><a href="/wiki/DSV_Limiting_Factor" title="DSV Limiting Factor"><i>Limiting Factor</i></a></li> <li><a href="/wiki/Russian_submarine_Losharik" title="Russian submarine Losharik">Russian submarine <i>Losharik</i></a></li> <li><a href="/wiki/Mir_(submersible)" title="Mir (submersible)"><i>Mir</i></a></li> <li><a href="/wiki/Nautile" title="Nautile"><i>Nautile</i></a></li> <li><a href="/wiki/Pisces-class_deep_submergence_vehicle" title="Pisces-class deep submergence vehicle"><i>Pisces</i>-class deep submergence vehicle</a></li> <li><a href="/wiki/DSV_Sea_Cliff" title="DSV Sea Cliff">DSV <i>Sea Cliff</i></a></li> <li><a href="/wiki/DSV_Shinkai" title="DSV Shinkai">DSV <i>Shinkai</i></a></li> <li><a href="/wiki/DSV_Shinkai_2000" title="DSV Shinkai 2000">DSV <i>Shinkai 2000</i></a></li> <li><a href="/wiki/DSV_Shinkai_6500" title="DSV Shinkai 6500">DSV <i>Shinkai 6500</i></a></li> <li><a href="/wiki/DSV_Turtle" title="DSV Turtle">DSV <i>Turtle</i></a></li> <li><a href="/wiki/DSV-5_Nemo" title="DSV-5 Nemo">DSV-5 <i>Nemo</i></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Submarine_rescue" title="Submarine rescue">Submarine rescue</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/International_Submarine_Escape_and_Rescue_Liaison_Office" title="International Submarine Escape and Rescue Liaison Office">International Submarine Escape and Rescue Liaison Office</a></li> <li><a href="/wiki/Submarine_Escape_and_Rescue_system_(Royal_Swedish_Navy)" title="Submarine Escape and Rescue system (Royal Swedish Navy)">Submarine Escape and Rescue system (Royal Swedish Navy)</a></li> <li><a href="/wiki/McCann_Rescue_Chamber" title="McCann Rescue Chamber">McCann Rescue Chamber</a></li> <li><a href="/wiki/Submarine_rescue_ship" title="Submarine rescue ship">Submarine rescue ship</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Deep-submergencerescue_vehicle" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Deep-submergence_rescue_vehicle" title="Deep-submergence rescue vehicle">Deep-submergence<br />rescue vehicle</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/LR5" title="LR5">LR5</a></li> <li><a href="/wiki/LR7" title="LR7">LR7</a></li> <li><a href="/wiki/MSM-1" title="MSM-1">MSM-1</a></li> <li><a href="/wiki/Mystic-class_deep-submergence_rescue_vehicle" title="Mystic-class deep-submergence rescue vehicle"><i>Mystic</i>-class deep-submergence rescue vehicle</a> <ul><li><a href="/wiki/DSRV-1_Mystic" title="DSRV-1 Mystic">DSRV-1 <i>Mystic</i></a></li> <li><a href="/wiki/DSRV-2_Avalon" title="DSRV-2 Avalon">DSRV-2 <i>Avalon</i></a></li></ul></li> <li><a href="/wiki/NATO_Submarine_Rescue_System" title="NATO Submarine Rescue System">NATO Submarine Rescue System</a></li> <li><a href="/wiki/Priz-class_deep-submergence_rescue_vehicle" title="Priz-class deep-submergence rescue vehicle"><i>Priz</i>-class deep-submergence rescue vehicle</a> <ul><li><a href="/wiki/Russian_deep_submergence_rescue_vehicle_AS-28" title="Russian deep submergence rescue vehicle AS-28">Russian deep submergence rescue vehicle AS-28</a></li> <li><a href="/wiki/Russian_submarine_AS-34" title="Russian submarine AS-34">Russian submarine AS-34</a></li></ul></li> <li><a href="/wiki/ASRV_Remora" class="mw-redirect" title="ASRV Remora">ASRV <i>Remora</i></a></li> <li><a href="/wiki/SRV-300" title="SRV-300">SRV-300</a></li> <li><a href="/wiki/Submarine_Rescue_Diving_Recompression_System" title="Submarine Rescue Diving Recompression System">Submarine Rescue Diving Recompression System</a></li> <li><a href="/wiki/Type_7103_DSRV" class="mw-redirect" title="Type 7103 DSRV">Type 7103 DSRV</a></li> <li><a href="/wiki/URF_(Swedish_Navy)" title="URF (Swedish Navy)">URF (Swedish Navy)</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/w/index.php?title=Submarine_escape&action=edit&redlink=1" class="new" title="Submarine escape (page does not exist)">Submarine escape</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Escape_trunk" title="Escape trunk">Escape trunk</a></li> <li><a href="/wiki/Submarine_escape_training_facility" title="Submarine escape training facility">Submarine escape training facility</a></li> <li><a href="/wiki/Submarine_Escape_Training_Facility_(Australia)" title="Submarine Escape Training Facility (Australia)">Submarine Escape Training Facility (Australia)</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Escape_set" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Escape_set" class="mw-redirect" title="Escape set">Escape set</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Davis_Submerged_Escape_Apparatus" title="Davis Submerged Escape Apparatus">Davis Submerged Escape Apparatus</a></li> <li><a href="/wiki/Momsen_lung" title="Momsen lung">Momsen lung</a></li> <li><a href="/wiki/Steinke_hood" title="Steinke hood">Steinke hood</a></li> <li><a href="/wiki/Submarine_Escape_Immersion_Equipment" title="Submarine Escape Immersion Equipment">Submarine Escape Immersion Equipment</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Special<br />interest<br />groups</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Artificial_Reef_Society_of_British_Columbia" title="Artificial Reef Society of British Columbia">Artificial Reef Society of British Columbia</a></li> <li><a href="/wiki/CMAS_Europe" title="CMAS Europe">CMAS Europe</a></li> <li><a href="/wiki/Coral_Reef_Alliance" title="Coral Reef Alliance">Coral Reef Alliance</a></li> <li><a href="/wiki/Divers_Alert_Network" title="Divers Alert Network">Divers Alert Network</a></li> <li><a href="/wiki/Green_Fins" title="Green Fins">Green Fins</a></li> <li><a href="/wiki/Finger_Lakes_Underwater_Preserve_Association" title="Finger Lakes Underwater Preserve Association">Finger Lakes Underwater Preserve Association</a></li> <li><a href="/wiki/Karst_Underwater_Research" title="Karst Underwater Research">Karst Underwater Research</a></li> <li><a href="/wiki/Nautical_Archaeology_Program" title="Nautical Archaeology Program">Nautical Archaeology Program</a></li> <li><a href="/wiki/Nautical_Archaeology_Society" title="Nautical Archaeology Society">Nautical Archaeology Society</a></li> <li><a href="/wiki/Naval_Air_Command_Sub_Aqua_Club" title="Naval Air Command Sub Aqua Club">Naval Air Command Sub Aqua Club</a></li> <li><a href="/wiki/PADI_AWARE" title="PADI AWARE">PADI AWARE</a></li> <li><a href="/wiki/Reef_Check" title="Reef Check">Reef Check</a></li> <li><a href="/wiki/Reef_Life_Survey" title="Reef Life Survey">Reef Life Survey</a></li> <li><a href="/wiki/Rubicon_Foundation" title="Rubicon Foundation">Rubicon Foundation</a></li> <li><a href="/wiki/Save_Ontario_Shipwrecks" title="Save Ontario Shipwrecks">Save Ontario Shipwrecks</a></li> <li><a href="/wiki/SeaKeys" title="SeaKeys">SeaKeys</a></li> <li><a href="/wiki/Sea_Research_Society" title="Sea Research Society">Sea Research Society</a></li> <li><a href="/wiki/Society_for_Underwater_Historical_Research" title="Society for Underwater Historical Research">Society for Underwater Historical Research</a></li> <li><a href="/wiki/Society_for_Underwater_Technology" title="Society for Underwater Technology">Society for Underwater Technology</a></li> <li><a href="/wiki/Underwater_Archaeology_Branch,_Naval_History_%26_Heritage_Command" title="Underwater Archaeology Branch, Naval History & Heritage Command">Underwater Archaeology Branch, Naval History & Heritage Command</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Neutral buoyancy<br />facilities for<br />Astronaut training</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Neutral_Buoyancy_Laboratory" title="Neutral Buoyancy Laboratory">Neutral Buoyancy Laboratory</a></li> <li><a href="/wiki/Neutral_buoyancy_pool" title="Neutral buoyancy pool">Neutral buoyancy pool</a></li> <li><a href="/wiki/Neutral_buoyancy_simulation_as_a_training_aid" title="Neutral buoyancy simulation as a training aid">Neutral buoyancy simulation as a training aid</a></li> <li><a href="/wiki/Neutral_Buoyancy_Simulator" title="Neutral Buoyancy Simulator">Neutral Buoyancy Simulator</a></li> <li><a href="/wiki/Space_Systems_Laboratory_(Maryland)" title="Space Systems Laboratory (Maryland)">Space Systems Laboratory</a></li> <li><a href="/wiki/Yuri_Gagarin_Cosmonaut_Training_Center" title="Yuri Gagarin Cosmonaut Training Center">Yuri Gagarin Cosmonaut Training Center</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Nautilus_Productions" title="Nautilus Productions">Nautilus Productions</a></li> <li><a href="/wiki/Helicopter_Aircrew_Breathing_Device" title="Helicopter Aircrew Breathing Device">Helicopter Aircrew Breathing Device</a></li> <li><a href="/wiki/Scuba_diving_therapy" title="Scuba diving therapy">Scuba diving therapy</a></li> <li><a href="/wiki/Seabed_mining" title="Seabed mining">Seabed mining</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr></tbody></table><div></div></td></tr><tr><td class="navbox-abovebelow" colspan="2" style="font-weight: bold;"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <b><a href="/wiki/Category:Underwater_diving" title="Category:Underwater diving">Category</a></b></li> <li><span class="noviewer" typeof="mw:File"><span title="Commons page"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/12px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/24px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span> <b><a href="https://commons.wikimedia.org/wiki/Category:Underwater_diving" class="extiw" 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