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Available in 19 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-19" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">19 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%90%D0%B7%D0%B8%D0%BC%D1%83%D1%82%D0%BD%D0%BE_%D0%B2%D0%B8%D0%BD%D1%82%D0%BE%D1%80%D1%83%D0%BB%D0%B5%D0%B2o_%D1%83%D1%81%D1%82%D1%80%D0%BE%D0%B9%D1%81%D1%82%D0%B2%D0%BE" title="Азимутно винторулевo устройство – Bulgarian" lang="bg" hreflang="bg" data-title="Азимутно винторулевo устройство" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Propulsor_azimutal" title="Propulsor azimutal – Catalan" lang="ca" hreflang="ca" data-title="Propulsor azimutal" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Pod_(lodn%C3%AD_pohon)" title="Pod (lodní pohon) – Czech" lang="cs" hreflang="cs" data-title="Pod (lodní pohon)" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Azimut_(skibsdel)" title="Azimut (skibsdel) – Danish" lang="da" hreflang="da" data-title="Azimut (skibsdel)" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Propellergondel" title="Propellergondel – German" lang="de" hreflang="de" data-title="Propellergondel" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Propulsor_azimutal" title="Propulsor azimutal – Spanish" lang="es" hreflang="es" data-title="Propulsor azimutal" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/%C5%9Cip%C5%9Dra%C5%ADbo" title="Ŝipŝraŭbo – Esperanto" lang="eo" hreflang="eo" data-title="Ŝipŝraŭbo" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B1%D8%A7%D9%86%D8%B4%E2%80%8C%DA%AF%D8%B1" title="رانش‌گر – Persian" lang="fa" hreflang="fa" data-title="رانش‌گر" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Pod_(navigation)" title="Pod (navigation) – French" lang="fr" hreflang="fr" data-title="Pod (navigation)" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%A0%84%EB%B0%A9%EC%9C%84_%EC%B6%94%EC%A7%84%EA%B8%B0" title="전방위 추진기 – Korean" lang="ko" hreflang="ko" data-title="전방위 추진기" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Propulsore_azimutale" title="Propulsore azimutale – Italian" lang="it" hreflang="it" data-title="Propulsore azimutale" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Roerpropeller" title="Roerpropeller – Dutch" lang="nl" hreflang="nl" data-title="Roerpropeller" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%82%A2%E3%82%B8%E3%83%9E%E3%82%B9%E3%82%B9%E3%83%A9%E3%82%B9%E3%82%BF%E3%83%BC" title="アジマススラスター – Japanese" lang="ja" hreflang="ja" data-title="アジマススラスター" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Azimut-thruster" title="Azimut-thruster – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Azimut-thruster" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/P%C4%99dnik_azymutalny" title="Pędnik azymutalny – Polish" lang="pl" hreflang="pl" data-title="Pędnik azymutalny" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%92%D0%B8%D0%BD%D1%82%D0%BE%D1%80%D1%83%D0%BB%D0%B5%D0%B2%D0%B0%D1%8F_%D0%BA%D0%BE%D0%BB%D0%BE%D0%BD%D0%BA%D0%B0" title="Винторулевая колонка – Russian" lang="ru" hreflang="ru" data-title="Винторулевая колонка" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Ruoripotkuri" title="Ruoripotkuri – Finnish" lang="fi" hreflang="fi" data-title="Ruoripotkuri" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Roderpropeller" title="Roderpropeller – Swedish" lang="sv" hreflang="sv" 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0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><table class="box-More_citations_needed plainlinks metadata ambox ambox-content ambox-Refimprove" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, 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Unsourced material may be challenged and removed.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22Azimuth+thruster%22">"Azimuth thruster"</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Azimuth+thruster%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22Azimuth+thruster%22&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22Azimuth+thruster%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Azimuth+thruster%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Azimuth+thruster%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">September 2012</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Siemens_Schottel_Propulsor.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Siemens_Schottel_Propulsor.jpg/220px-Siemens_Schottel_Propulsor.jpg" decoding="async" width="220" height="180" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Siemens_Schottel_Propulsor.jpg/330px-Siemens_Schottel_Propulsor.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Siemens_Schottel_Propulsor.jpg/440px-Siemens_Schottel_Propulsor.jpg 2x" data-file-width="1872" data-file-height="1535" /></a><figcaption><a href="/wiki/Siemens_AG" class="mw-redirect" title="Siemens AG">Siemens</a> <a href="/wiki/Schottel_(company)" title="Schottel (company)">Schottel</a> azimuth thrusters</figcaption></figure> <p>An <b>azimuth thruster</b> is a configuration of marine <a href="/wiki/Propeller" title="Propeller">propellers</a> placed in pods that can be rotated to any horizontal angle (<a href="/wiki/Azimuth" title="Azimuth">azimuth</a>), making a <a href="/wiki/Rudder" title="Rudder">rudder</a> redundant. These give <a href="/wiki/Ship" title="Ship">ships</a> better maneuverability than a fixed propeller and rudder system. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Types_of_azimuth_thrusters">Types of azimuth thrusters</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Azimuth_thruster&action=edit&section=1" title="Edit section: Types of azimuth thrusters"><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:Oued_el_Kebir-IMG_9346.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Oued_el_Kebir-IMG_9346.jpg/170px-Oued_el_Kebir-IMG_9346.jpg" decoding="async" width="170" height="255" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Oued_el_Kebir-IMG_9346.jpg/255px-Oued_el_Kebir-IMG_9346.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Oued_el_Kebir-IMG_9346.jpg/340px-Oued_el_Kebir-IMG_9346.jpg 2x" data-file-width="3744" data-file-height="5616" /></a><figcaption>Azimuth thrusters on the tug <i>Oued el Kebir</i> - note the <a href="/wiki/Kort_nozzle" class="mw-redirect" title="Kort nozzle">Kort nozzles</a></figcaption></figure> <p>There are two major variants, based on the location of the motor:<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. (November 2014)">citation needed</span></a></i>]</sup> </p> <ol><li><a href="/wiki/Transmission_(mechanics)" class="mw-redirect" title="Transmission (mechanics)">Mechanical transmission</a>, which connects a motor inside the ship to the outboard unit by <a href="/wiki/Gear" title="Gear">gearing</a>. The motor may be <a href="/wiki/Diesel_engine" title="Diesel engine">diesel</a> or <a href="/wiki/Diesel-electric_transmission" class="mw-redirect" title="Diesel-electric transmission">diesel-electric</a>. Depending on the shaft arrangement, mechanical azimuth thrusters are divided into <a href="/wiki/L-drive" title="L-drive">L-drive</a> and <a href="/wiki/Z-drive" title="Z-drive">Z-drive</a>. An L-drive thruster has a vertical input shaft and a horizontal output shaft with one right-angle gear. A Z-drive thruster has a horizontal input shaft, a vertical shaft in the rotating column and a horizontal output shaft, with two right-angle gears.</li> <li><a href="/wiki/Diesel-electric_transmission" class="mw-redirect" title="Diesel-electric transmission">Electrical transmission</a>, more commonly called pods, where an electric motor is fitted in the pod itself, connected directly to the propeller without gears. The electricity is produced by an onboard engine, usually <a href="/wiki/Diesel_engine" title="Diesel engine">diesel</a> or <a href="/wiki/Gas_turbine" title="Gas turbine">gas turbine</a>. Invented in 1955 by <a href="/wiki/Friedrich_W._Pleuger" class="mw-redirect" title="Friedrich W. Pleuger">Friedrich W. Pleuger</a> and <a href="/w/index.php?title=Friedrich_Busmann&action=edit&redlink=1" class="new" title="Friedrich Busmann (page does not exist)">Friedrich Busmann</a> (Pleuger Unterwasserpumpen GmbH), <a href="/wiki/ABB_Group" class="mw-redirect" title="ABB Group">ABB Group</a>'s <a href="/wiki/Azipod" title="Azipod">Azipod</a> was the first product using this technology.</li></ol> <p>The most powerful podded thrusters in use are the four 21.5 MW Rolls-Royce Mermaid units fitted to <a href="/wiki/Queen_Mary_2" title="Queen Mary 2">RMS <i>Queen Mary 2</i></a>.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>Mechanical azimuth thrusters can be fixed installed, retractable or underwater-mountable. They may have fixed pitch propellers or <a href="/wiki/Controllable_pitch_propeller" class="mw-redirect" title="Controllable pitch propeller">controllable pitch propellers</a>. Fixed installed thrusters are used for tugboats, ferries and supply-boats. Retractable thrusters are used as auxiliary propulsion for dynamically positioned vessels and take-home propulsion for military vessels. Underwater-mountable thrusters are used as dynamic positioning propulsion for very large vessels such as <a href="/wiki/Semi-submersible" title="Semi-submersible">semi-submersible</a> <a href="/wiki/Drilling_rig" title="Drilling rig">drilling rigs</a> and <a href="/wiki/Drillship" title="Drillship">drillships</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Advantages_and_disadvantages">Advantages and disadvantages</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Azimuth_thruster&action=edit&section=2" title="Edit section: Advantages and disadvantages"><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:BPC_Dixmude.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/BPC_Dixmude.jpg/220px-BPC_Dixmude.jpg" decoding="async" width="220" height="146" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/BPC_Dixmude.jpg/330px-BPC_Dixmude.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a2/BPC_Dixmude.jpg/440px-BPC_Dixmude.jpg 2x" data-file-width="4161" data-file-height="2764" /></a><figcaption>The <a href="/wiki/French_Navy" title="French Navy">French Navy</a> <a href="/wiki/Mistral-class_amphibious_assault_ship" class="mw-redirect" title="Mistral-class amphibious assault ship">Mistral-class amphibious assault ship</a> <a href="/wiki/French_ship_Dixmude_(L9015)" title="French ship Dixmude (L9015)"><i>Dixmude</i></a> manoeuvering in Jounieh bay; the wake at the stern is perpendicular to the ship, indicating the use of her azimuth thrusters.</figcaption></figure> <p>Primary advantages are maneuverability, electrical efficiency, better use of ship space, and lower maintenance costs.<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. (October 2010)">citation needed</span></a></i>]</sup> Ships with azimuth thrusters do not need <a href="/wiki/Tugboat" title="Tugboat">tugboats</a> to dock, though they may still require tugs to maneuver in difficult places.<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. (October 2020)">citation needed</span></a></i>]</sup> </p><p>The major disadvantage of azimuth drive systems is that a ship with azimuth drive maneuvers differently from one with a standard propeller and rudder configuration, necessitating specialized pilot training.<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. (October 2020)">citation needed</span></a></i>]</sup> Another disadvantage is they increase the draught of the ship.<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. (October 2020)">citation needed</span></a></i>]</sup> </p> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Azimuth_thruster&action=edit&section=3" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>English inventor <a href="/wiki/Francis_Ronalds" title="Francis Ronalds">Francis Ronalds</a> described what he called a <i>propelling rudder</i> in 1859 that combined the propulsion and steering mechanisms of a boat in a single apparatus. The propeller was placed in a frame having an outer profile similar to a rudder and attached to a vertical shaft that allowed the device to rotate in plane while spin was transmitted to the propeller.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>The modern azimuth thruster using the Z-drive transmission was invented in 1951 by Joseph Becker, the founder of <a href="/wiki/Schottel_(company)" title="Schottel (company)">Schottel</a> in Germany, and marketed as the Ruderpropeller. Becker was awarded the 2004 <a href="/wiki/Elmer_A._Sperry_Award" title="Elmer A. Sperry Award">Elmer A. Sperry Award</a> for the invention.<sup id="cite_ref-sperry_3-0" class="reference"><a href="#cite_note-sperry-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> This kind of propulsion was first patented in 1955 by <a href="/wiki/Pleuger_rudder" title="Pleuger rudder">Pleuger</a>.<sup id="cite_ref-Pleuger_4-0" class="reference"><a href="#cite_note-Pleuger-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p><p>In the late 1980s Wärtsilä Marine, Strömberg and the Finnish National Board of Navigation developed the <a href="/wiki/Azipod" title="Azipod">Azipod</a> thruster with the motor located in the pod itself.<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. (November 2014)">citation needed</span></a></i>]</sup> </p> <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=Azimuth_thruster&action=edit&section=4" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Pleuger_rudder" title="Pleuger rudder">Pleuger rudder</a> – Thruster assisted ship's rudder</li> <li><a href="/wiki/Cyclorotor" title="Cyclorotor">Cyclorotor</a> – Perpendicular-axis marine propulsion system</li> <li><a href="/wiki/Voith_Schneider_Propeller" title="Voith Schneider Propeller">Voith Schneider Propeller</a> – Proprietary marine propulsion system</li> <li><a href="/wiki/Saildrive" title="Saildrive">Saildrive</a> – Non-steerable propeller drive leg</li> <li><a href="/wiki/Z-drive" title="Z-drive">Z-drive</a> – Steerable marine drive system</li> <li><a href="/wiki/Outboard_motor" title="Outboard motor">Outboard motor</a> – Self-contained propulsion system for boats</li></ul> <style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(--background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1;min-width:0}}@media(min-width:720px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}}</style><style data-mw-deduplicate="TemplateStyles:r1237033735">@media print{body.ns-0 .mw-parser-output .sistersitebox{display:none!important}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}</style><div class="side-box side-box-right plainlinks sistersitebox"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style> <div class="side-box-flex"> <div class="side-box-image"><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Commons-logo.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png" decoding="async" width="30" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/45px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/59px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span></div> <div class="side-box-text plainlist">Wikimedia Commons has media related to <span style="font-weight: bold; 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Retrieved <span class="nowrap">1 February</span> 2020</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Mermaid+propulsion+unit&rft.pub=W%C3%A4rtsil%C3%A4&rft_id=https%3A%2F%2Fwww.wartsila.com%2Fencyclopedia%2Fterm%2Fmermaid-propulsion-unit&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAzimuth+thruster" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFRonalds2016" class="citation book cs1">Ronalds, B.F. (2016). <i>Sir Francis Ronalds: Father of the Electric Telegraph</i>. London: Imperial College Press. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-1-78326-917-4" title="Special:BookSources/978-1-78326-917-4"><bdi>978-1-78326-917-4</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Sir+Francis+Ronalds%3A+Father+of+the+Electric+Telegraph&rft.place=London&rft.pub=Imperial+College+Press&rft.date=2016&rft.isbn=978-1-78326-917-4&rft.aulast=Ronalds&rft.aufirst=B.F.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAzimuth+thruster" class="Z3988"></span></span> </li> <li id="cite_note-sperry-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-sperry_3-0">^</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="http://www.sperryaward.org/awardbooklets/2004%20Sperry%20Award%20Booklet.pdf">"Presentation of The Elmer A. 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Retrieved <span class="nowrap">24 November</span> 2014</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Patent+US2714866+-+Device+for+propelling+a+ship&rft_id=https%3A%2F%2Fpatents.google.com%2Fpatent%2FUS2714866&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAzimuth+thruster" class="Z3988"></span></span> </li> </ol></div></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Azimuth_thruster&oldid=1253829441">https://en.wikipedia.org/w/index.php?title=Azimuth_thruster&oldid=1253829441</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Category</a>: <ul><li><a href="/wiki/Category:Marine_propulsion" title="Category:Marine propulsion">Marine propulsion</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/wiki/Category:Articles_with_short_description" title="Category:Articles with short description">Articles with short description</a></li><li><a href="/wiki/Category:Short_description_is_different_from_Wikidata" title="Category:Short description is different from Wikidata">Short description is different from Wikidata</a></li><li><a href="/wiki/Category:Articles_needing_additional_references_from_September_2012" title="Category:Articles needing additional references from September 2012">Articles needing additional references from September 2012</a></li><li><a href="/wiki/Category:All_articles_needing_additional_references" title="Category:All articles needing additional references">All articles needing additional references</a></li><li><a href="/wiki/Category:All_articles_with_unsourced_statements" title="Category:All articles with unsourced statements">All articles with unsourced statements</a></li><li><a href="/wiki/Category:Articles_with_unsourced_statements_from_November_2014" title="Category:Articles with unsourced statements from November 2014">Articles with unsourced statements from November 2014</a></li><li><a href="/wiki/Category:Articles_with_unsourced_statements_from_October_2010" title="Category:Articles with unsourced statements from October 2010">Articles with unsourced statements from October 2010</a></li><li><a href="/wiki/Category:Articles_with_unsourced_statements_from_October_2020" title="Category:Articles with unsourced statements from October 2020">Articles with unsourced statements from October 2020</a></li><li><a href="/wiki/Category:Commons_category_link_is_on_Wikidata" title="Category:Commons category link is on Wikidata">Commons category link is on Wikidata</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 28 October 2024, at 03:12<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. 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