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href="#Construction_and_commissioning"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Construction and commissioning</span> </div> </a> <ul id="toc-Construction_and_commissioning-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Service_history" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Service_history"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Service history</span> </div> </a> <button aria-controls="toc-Service_history-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 Service history subsection</span> </button> <ul id="toc-Service_history-sublist" class="vector-toc-list"> <li id="toc-May–September_1943" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#May–September_1943"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>May–September 1943</span> </div> </a> <ul id="toc-May–September_1943-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-First_war_patrol" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#First_war_patrol"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>First war patrol</span> </div> </a> <ul id="toc-First_war_patrol-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Second_war_patrol" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Second_war_patrol"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.3</span> <span>Second war patrol</span> </div> </a> <ul id="toc-Second_war_patrol-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-New_Guinea_campaign" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#New_Guinea_campaign"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.4</span> <span>New Guinea campaign</span> </div> </a> <ul id="toc-New_Guinea_campaign-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Loss" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Loss"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.5</span> <span>Loss</span> </div> </a> <ul id="toc-Loss-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Notes" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Notes"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Notes</span> </div> </a> <ul id="toc-Notes-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">5</span> <span>References</span> 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id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><table class="infobox" style="width:25.5em;border-spacing:2px;"> <tbody><tr> <td colspan="2" style="text-align:center;line-height:1.5em;"><span typeof="mw:File"><a href="/wiki/File:I-176.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/81/I-176.jpg/300px-I-176.jpg" decoding="async" width="300" height="84" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/81/I-176.jpg/450px-I-176.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/81/I-176.jpg/600px-I-176.jpg 2x" data-file-width="1164" data-file-height="324" /></a></span><div><a href="/wiki/Sister_ship" title="Sister ship">Sister ship</a> <i>I-176</i> at sea in 1942</div> </td></tr><tr><th colspan="2" style="background-color:#C3D6EF;color:inherit;text-align:center;vertical-align:middle;font-size:110%;">History</th></tr> <tr><th height="30" colspan="2" style="background-color:#B0C4DE;text-align:left;padding-left:2px;vertical-align:middle;font-size:110%;"><span class="flagicon"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/54/Naval_ensign_of_the_Empire_of_Japan.svg/42px-Naval_ensign_of_the_Empire_of_Japan.svg.png" decoding="async" width="42" height="28" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/54/Naval_ensign_of_the_Empire_of_Japan.svg/63px-Naval_ensign_of_the_Empire_of_Japan.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/54/Naval_ensign_of_the_Empire_of_Japan.svg/84px-Naval_ensign_of_the_Empire_of_Japan.svg.png 2x" data-file-width="900" data-file-height="600" /></span></span></span><span style="padding-left:1em"><a href="/wiki/Empire_of_Japan" title="Empire of Japan">Empire of Japan</a></span></th></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Name</td><td><i>Submarine No. 159</i></td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Builder</td><td><a href="/wiki/Kure_Naval_Arsenal" title="Kure Naval Arsenal">Kure Naval Arsenal</a>, <a href="/wiki/Kure,_Hiroshima" title="Kure, Hiroshima">Kure</a>, <a href="/wiki/Japan" title="Japan">Japan</a></td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Laid down</td><td>11 November 1941</td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Renamed</td><td><i>I-81</i></td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Launched</td><td>2 May 1942</td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Renamed</td><td><i>I-181</i> on 20 May 1942</td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Completed</td><td>24 May 1943</td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Fate</td><td>Missing after 13 January 1944</td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Stricken</td><td>30 April 1944</td></tr> <tr><th colspan="2" style="background-color:#C3D6EF;color:inherit;text-align:center;vertical-align:middle;font-size:110%;">General characteristics</th></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Class and type</td><td><a href="/wiki/Kaidai_type_submarine" class="mw-redirect" title="Kaidai type submarine"><i>Kaidai</i> type</a>, <a href="/wiki/Kaidai_type_submarine#Kaidai_VII_(I-176_class)" class="mw-redirect" title="Kaidai type submarine"><i>KD7</i>-class</a></td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Displacement</td><td><ul style="list-style:none; margin:0;"> <li style="padding-left: .4em; text-indent: -.4em;">1,862 t (1,833 long tons) surfaced</li> <li style="padding-left: .4em; text-indent: -.4em;">2,644 t (2,602 long tons) submerged</li> </ul></td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Length</td><td>105.5 m (346 ft 2 in)</td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Beam</td><td>8.25 m (27 ft 1 in)</td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Draft</td><td>4.6 m (15 ft 1 in)</td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Installed power</td><td><ul style="list-style:none; margin:0;"> <li style="padding-left: .4em; text-indent: -.4em;">8,000 <a href="/wiki/Horsepower#Brake_horsepower" title="Horsepower">bhp</a> (5,966 kW) (diesels)</li> <li style="padding-left: .4em; text-indent: -.4em;">1,800 hp (1,342 kW) (electric motors)</li> </ul></td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Propulsion</td><td><ul style="list-style:none; margin:0;"> <li style="padding-left: .4em; text-indent: -.4em;"><a href="/wiki/Diesel-electric" class="mw-redirect" title="Diesel-electric">Diesel-electric</a></li> <li style="padding-left: .4em; text-indent: -.4em;">2 × <a href="/wiki/Diesel_engine" title="Diesel engine">diesel engines</a></li> <li style="padding-left: .4em; text-indent: -.4em;">2 × <a href="/wiki/Electric_motor" title="Electric motor">electric motors</a></li> </ul></td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Speed</td><td><ul style="list-style:none; margin:0;"> <li style="padding-left: .4em; text-indent: -.4em;">23 <a href="/wiki/Knot_(unit)" title="Knot (unit)">knots</a> (43 km/h; 26 mph) surfaced</li> <li style="padding-left: .4em; text-indent: -.4em;">8 knots (15 km/h; 9.2 mph) submerged</li> </ul></td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Range</td><td><ul style="list-style:none; margin:0;"> <li style="padding-left: .4em; text-indent: -.4em;">8,000 <a href="/wiki/Nautical_mile" title="Nautical mile">nmi</a> (15,000 km; 9,200 mi) at 16 knots (30 km/h; 18 mph) surfaced</li> <li style="padding-left: .4em; text-indent: -.4em;">50 nmi (93 km; 58 mi) at 5 knots (9.3 km/h; 5.8 mph) submerged</li> </ul></td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Test depth</td><td>80 m (262 ft)</td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Complement</td><td>86</td></tr> <tr style="vertical-align:top;"><td style="font-weight: bold">Armament</td><td><ul style="list-style:none; margin:0;"> <li style="padding-left: .4em; text-indent: -.4em;">6 × 533 mm (21 in) <a href="/wiki/Torpedo_tube" title="Torpedo tube">torpedo tubes</a> (all bow)</li> <li style="padding-left: .4em; text-indent: -.4em;">1 × <a href="/wiki/12_cm_11th_Year_Type_naval_gun" title="12 cm 11th Year Type naval gun">120 mm (4.7 in)</a> <a href="/wiki/Deck_gun" title="Deck gun">deck gun</a></li> <li style="padding-left: .4em; text-indent: -.4em;">1 × twin <a href="/wiki/Type_96_25_mm_AT/AA_Gun" class="mw-redirect" title="Type 96 25 mm AT/AA Gun">25 mm (1.0 in) Type 96</a> <a href="/wiki/AA_gun" class="mw-redirect" title="AA gun">AA gun</a></li> </ul></td></tr> </tbody></table> <p><i><b>I-181</b></i> (originally <i><b>I-81</b></i>) was an <a href="/wiki/Imperial_Japanese_Navy" title="Imperial Japanese Navy">Imperial Japanese Navy</a> <a href="/wiki/Kaidai_type_submarine" class="mw-redirect" title="Kaidai type submarine"><i>Kaidai</i>-type</a> <a href="/wiki/Cruiser_submarine" title="Cruiser submarine">cruiser submarine</a> of the KD7 <a href="/wiki/Ship_class" title="Ship class">sub-class</a> commissioned in 1943. During <a href="/wiki/World_War_II" title="World War II">World War II</a>, she conducted two war patrols, rescued the <a href="/wiki/United_States_Marine_Corps" title="United States Marine Corps">United States Marine Corps</a> <a href="/wiki/Flying_ace" title="Flying ace">ace</a> <a href="/wiki/Pappy_Boyington" title="Pappy Boyington">Gregory "Pappy" Boyington</a>, and took part in the <a href="/wiki/New_Guinea_campaign" title="New Guinea campaign">New Guinea campaign</a> before American <a href="/wiki/Warship" title="Warship">warships</a> sank her in January 1944. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Design_and_description">Design and description</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Japanese_submarine_I-181&action=edit&section=1" title="Edit section: Design and description"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The submarines of the KD7 sub-class were medium-range <a href="/wiki/Attack_submarine" title="Attack submarine">attack submarines</a> developed from the preceding KD6 sub-class. They <a href="/wiki/Displacement_(ship)" title="Displacement (ship)">displaced</a> 1,862 metric tons (1,833 long tons) surfaced and 2,644 metric tons (2,602 long tons) submerged. The submarines were 105.5 meters (346 ft 2 in) long, had a <a href="/wiki/Beam_(nautical)" title="Beam (nautical)">beam</a> of 8.25 meters (27 ft 1 in) and a <a href="/wiki/Draft_(hull)" title="Draft (hull)">draft</a> of 4.6 meters (15 ft 1 in). They had a diving depth of 80 m (262 ft) and a complement of 86 <a href="/wiki/Commissioned_officer" class="mw-redirect" title="Commissioned officer">officers</a> and <a href="/wiki/Enlisted_rank" title="Enlisted rank">crewmen</a>.<sup id="cite_ref-cd3_1-0" class="reference"><a href="#cite_note-cd3-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>For surface running, the submarines were powered by two 4,000-<a href="/wiki/Horsepower#Brake_horsepower" title="Horsepower">brake-horsepower</a> (2,983 kW) <a href="/wiki/Diesel_engine" title="Diesel engine">diesel engines</a>, each driving one <a href="/wiki/Propeller_shaft" class="mw-redirect" title="Propeller shaft">propeller shaft</a>. When submerged each propeller was driven by a 900-horsepower (671 kW) <a href="/wiki/Electric_motor" title="Electric motor">electric motor</a>. The submarines could reach 23 <a href="/wiki/Knot_(unit)" title="Knot (unit)">knots</a> (43 km/h; 26 mph) on the surface and 8 knots (15 km/h; 9.2 mph) submerged. On the surface, the KD7s had a range of 8,000 <a href="/wiki/Nautical_mile" title="Nautical mile">nautical miles</a> (15,000 km; 9,200 mi) at 16 knots (30 km/h; 18 mph); submerged, they had a range of 50 nmi (93 km; 58 mi) at 5 knots (9.3 km/h; 5.8 mph).<sup id="cite_ref-c5_2-0" class="reference"><a href="#cite_note-c5-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>The submarines were armed with six internal 53.3 cm (21.0 in) <a href="/wiki/Torpedo_tube" title="Torpedo tube">torpedo tubes</a>, all in the <a href="/wiki/Bow_(ship)" class="mw-redirect" title="Bow (ship)">bow</a>. They carried one reload for each tube; a total of a dozen <a href="/wiki/Torpedo" title="Torpedo">torpedoes</a>. They were originally intended to be armed with two twin-gun mounts for the <a href="/wiki/Type_96_25_mm_AT/AA_Gun" class="mw-redirect" title="Type 96 25 mm AT/AA Gun">25 mm (1.0 in) Type 96</a> <a href="/wiki/Anti-aircraft_gun" class="mw-redirect" title="Anti-aircraft gun">anti-aircraft gun</a>, but a <a href="/wiki/12_cm_11th_Year_Type_naval_gun" title="12 cm 11th Year Type naval gun">120 mm (4.7 in)</a> <a href="/wiki/Deck_gun" title="Deck gun">deck gun</a> was substituted for one 25 mm mount during construction.<sup id="cite_ref-b4_3-0" class="reference"><a href="#cite_note-b4-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Construction_and_commissioning">Construction and commissioning</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Japanese_submarine_I-181&action=edit&section=2" title="Edit section: Construction and commissioning"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><i>I-181</i> was <a href="/wiki/Keel-laying" class="mw-redirect" title="Keel-laying">laid down</a> as <i><b>Submarine No. 159</b></i> at the <a href="/wiki/Kure_Naval_Arsenal" title="Kure Naval Arsenal">Kure Naval Arsenal</a> in <a href="/wiki/Kure,_Hiroshima" title="Kure, Hiroshima">Kure</a>, <a href="/wiki/Japan" title="Japan">Japan</a>, on 11 November 1941.<sup id="cite_ref-ijnsubsiteI181_4-0" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-0" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> She later was renamed <i><b>I-81</b></i>.<sup id="cite_ref-ijnsubsiteI181_4-1" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> She was launched on 2 May 1942<sup id="cite_ref-cd3_1-1" class="reference"><a href="#cite_note-cd3-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-ijnsubsiteI181_4-2" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-1" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> and provisionally attached to the <a href="/wiki/Sasebo_Naval_District" title="Sasebo Naval District">Sasebo Naval District</a> that day.<sup id="cite_ref-combinedfleetI181_5-2" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> She was renamed <i><b>I-181</b></i> on 20 May 1942,<sup id="cite_ref-ijnsubsiteI181_4-3" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> and was both completed and <a href="/wiki/Ship_commissioning" title="Ship commissioning">commissioned</a> on 24 May 1943.<sup id="cite_ref-cd3_1-2" class="reference"><a href="#cite_note-cd3-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-ijnsubsiteI181_4-4" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-3" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Service_history">Service history</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Japanese_submarine_I-181&action=edit&section=3" title="Edit section: Service history"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="May–September_1943"><span id="May.E2.80.93September_1943"></span>May–September 1943</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Japanese_submarine_I-181&action=edit&section=4" title="Edit section: May–September 1943"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>On the day of her commissioning, <i>I-181</i> was formally attached to the Sasebo Naval District and assigned to Submarine <a href="/wiki/Squadron_(naval)" title="Squadron (naval)">Squadron</a> 11 in the <a href="/wiki/1st_Fleet_(Imperial_Japanese_Navy)" title="1st Fleet (Imperial Japanese Navy)">1st Fleet</a>, an element of the <a href="/wiki/Combined_Fleet" title="Combined Fleet">Combined Fleet</a>, for workups.<sup id="cite_ref-ijnsubsiteI181_4-5" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-4" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> On 20 August 1943, she was reassigned to Submarine <a href="/wiki/Division_(naval)" title="Division (naval)">Division</a> 22 in Submarine Squadron 3 in the <a href="/wiki/6th_Fleet_(Imperial_Japanese_Navy)" title="6th Fleet (Imperial Japanese Navy)">6th Fleet</a>, also an element of the Combined Fleet.<sup id="cite_ref-ijnsubsiteI181_4-6" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-5" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> She departed Kure on 25 August 1943 bound for <a href="/wiki/Chuuk_Atoll" class="mw-redirect" title="Chuuk Atoll">Truk Atoll</a> in the <a href="/wiki/Caroline_Islands" title="Caroline Islands">Caroline Islands</a>, which she reached on 1 September 1943.<sup id="cite_ref-ijnsubsiteI181_4-7" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-6" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="First_war_patrol">First war patrol</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Japanese_submarine_I-181&action=edit&section=5" title="Edit section: First war patrol"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>On 7 September 1943, <i>I-181</i> put to sea from Truk to begin her first war patrol, assigned a patrol area off <a href="/wiki/Espiritu_Santo" title="Espiritu Santo">Espiritu Santo</a> in the <a href="/wiki/New_Hebrides" title="New Hebrides">New Hebrides</a>.<sup id="cite_ref-ijnsubsiteI181_4-8" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-7" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> While she was on patrol, Submarine Squadron 3 was disbanded on 15 September 1943, and Submarine Division 22 was assigned directly to the 6th Fleet.<sup id="cite_ref-ijnsubsiteI181_4-9" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-8" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> She moved to the <a href="/wiki/Solomon_Islands_(archipelago)" title="Solomon Islands (archipelago)">Solomon Islands</a> to patrol in an area off <a href="/wiki/Cape_Esperance" title="Cape Esperance">Cape Esperance</a> on the northwestern tip of <a href="/wiki/Guadalcanal" title="Guadalcanal">Guadalcanal</a>.<sup id="cite_ref-ijnsubsiteI181_4-10" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-9" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> She sighted no enemy ships, and on 30 September 1943 received orders to proceed to a new patrol area in the <a href="/wiki/Torres_Strait" title="Torres Strait">Torres Strait</a> between southeastern <a href="/wiki/New_Guinea" title="New Guinea">New Guinea</a> and northeastern <a href="/wiki/Australia" title="Australia">Australia</a>, which she reached on 2 October 1943.<sup id="cite_ref-ijnsubsiteI181_4-11" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-10" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> She attacked an <a href="/wiki/Allies_of_World_War_II" title="Allies of World War II">Allied</a> <a href="/wiki/Convoy" title="Convoy">convoy</a> twice in the Torres Strait on 14 October 1943, but scored no hits.<sup id="cite_ref-combinedfleetI181_5-11" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> She concluded her patrol with her return to Truk on 20 October 1943.<sup id="cite_ref-ijnsubsiteI181_4-12" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-12" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Second_war_patrol">Second war patrol</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Japanese_submarine_I-181&action=edit&section=6" title="Edit section: Second war patrol"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><i>I-181</i> got underway from Truk for her second war patrol on 11 November 1943,<sup id="cite_ref-ijnsubsiteI181_4-13" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-13" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> bound for a patrol area off <a href="/wiki/Bougainville_Island" title="Bougainville Island">Bougainville</a> in the Solomon Islands.<sup id="cite_ref-ijnsubsiteI181_4-14" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> While at sea, she was reassigned to the <a href="/wiki/8th_Fleet_(Imperial_Japanese_Navy)" title="8th Fleet (Imperial Japanese Navy)">8th Fleet</a>, an element of the <a href="/wiki/Southeast_Area_Fleet" title="Southeast Area Fleet">Southeast Area Fleet</a>, on 12 November 1943.<sup id="cite_ref-combinedfleetI181_5-14" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> On 26 November 1943, in the aftermath of the <a href="/wiki/Battle_of_Cape_St._George" title="Battle of Cape St. George">Battle of Cape St. George</a> — fought between Japanese and <a href="/wiki/United_States_Navy" title="United States Navy">United States Navy</a> <a href="/wiki/Destroyer" title="Destroyer">destroyers</a> 50 nautical miles (93 km; 58 mi) east of <a href="/wiki/Cape_St._George" title="Cape St. George">Cape St. George</a>, <a href="/wiki/New_Ireland_(island)" title="New Ireland (island)">New Ireland</a>, on 25 November 1943<sup id="cite_ref-combinedfleetI181_5-15" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> — she rescued 11 survivors of the destroyer <a href="/wiki/Japanese_destroyer_Y%C5%ABgiri_(1930)" title="Japanese destroyer Yūgiri (1930)"><i>Yūgiri</i></a>,<sup id="cite_ref-ijnsubsiteI181_4-15" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-16" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> which the destroyers <a href="/wiki/USS_Charles_Ausburne_(DD-570)" title="USS Charles Ausburne (DD-570)">USS <i>Charles Ausburne</i> (DD-570)</a>, <a href="/wiki/USS_Claxton_(DD-571)" title="USS Claxton (DD-571)">USS <i>Claxton</i> (DD-571)</a>, and <a href="/wiki/USS_Dyson" title="USS Dyson">USS <i>Dyson</i> (DD-572)</a> had sunk at <span class="geo-inline"><style data-mw-deduplicate="TemplateStyles:r1156832818">.mw-parser-output .geo-default,.mw-parser-output .geo-dms,.mw-parser-output .geo-dec{display:inline}.mw-parser-output .geo-nondefault,.mw-parser-output .geo-multi-punct,.mw-parser-output .geo-inline-hidden{display:none}.mw-parser-output .longitude,.mw-parser-output .latitude{white-space:nowrap}</style><span class="plainlinks nourlexpansion"><a class="external text" href="https://geohack.toolforge.org/geohack.php?pagename=Japanese_submarine_I-181&params=04_44_S_154_00_E_&title=%27%27Y%C5%ABgiri%27%27"><span class="geo-default"><span class="geo-dms" title="Maps, aerial photos, and other data for this location"><span class="latitude">04°44′S</span> <span class="longitude">154°00′E</span></span></span><span class="geo-multi-punct"> / </span><span class="geo-nondefault"><span class="vcard"><span class="geo-dec" title="Maps, aerial photos, and other data for this location">4.733°S 154.000°E</span><span style="display:none"> / <span class="geo">-4.733; 154.000</span></span><span style="display:none"> (<span class="fn org"><i>Yūgiri</i></span>)</span></span></span></a></span></span>,<sup id="cite_ref-combinedfleetI181_5-17" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> while the submarine <a href="/wiki/Japanese_submarine_I-177" title="Japanese submarine I-177"><i>I-177</i></a> rescued another 278 <i>Yūgiri</i> survivors.<sup id="cite_ref-combinedfleetI181_5-18" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> <i>I-181</i>′s patrol concluded with her arrival at <a href="/wiki/Rabaul" title="Rabaul">Rabaul</a> on <a href="/wiki/New_Britain" title="New Britain">New Britain</a> in the <a href="/wiki/Bismarck_Archipelago" title="Bismarck Archipelago">Bismarck Archipelago</a> on 29 November 1943.<sup id="cite_ref-ijnsubsiteI181_4-16" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-19" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="New_Guinea_campaign">New Guinea campaign</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Japanese_submarine_I-181&action=edit&section=7" title="Edit section: New Guinea campaign"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>After her arrival at Rabaul, <i>I-181</i> was assigned to supply duty in support of Japanese forces fighting on New Guinea in the <a href="/wiki/New_Guinea_campaign" title="New Guinea campaign">New Guinea campaign</a>. She set out from Rabaul on her first supply run at 09:30 on 7 December 1943 bound for <a href="/wiki/Sio,_Papua_New_Guinea" title="Sio, Papua New Guinea">Sio</a>, New Guinea,<sup id="cite_ref-ijnsubsiteI181_4-17" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-20" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> with 44 tons of cargo<sup id="cite_ref-ijnsubsiteI181_4-18" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-21" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> that included two packages of type H <a href="/wiki/Ammunition" title="Ammunition">ammunition</a>, one package of type U ammunition, four packages of <a href="/wiki/Code_book" class="mw-redirect" title="Code book">code books</a>, and one package of <a href="/wiki/Light_globe" class="mw-redirect" title="Light globe">light globes</a>.<sup id="cite_ref-combinedfleetI181_5-22" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> She arrived at Sio on 9 December and came under attack by Allied <a href="/wiki/Bomber" title="Bomber">bombers</a> which dropped 15 <a href="/wiki/Depth_charge" title="Depth charge">depth charges</a>, but she <a href="/wiki/Crash_dive" title="Crash dive">crash-dived</a> and avoided damage.<sup id="cite_ref-combinedfleetI181_5-23" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> She then unloaded her cargo and proceeded to Rabaul,<sup id="cite_ref-combinedfleetI181_5-24" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> where she arrived at 08:00 on 11 December 1943.<sup id="cite_ref-ijnsubsiteI181_4-19" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-25" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>On 14 December 1943, <i>I-181</i> began her second New Guinea supply run.<sup id="cite_ref-ijnsubsiteI181_4-20" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> She unloaded her cargo at <a href="/wiki/Buka,_Papua_New_Guinea" class="mw-redirect" title="Buka, Papua New Guinea">Buka</a> on 16 December and got back underway the same day,<sup id="cite_ref-combinedfleetI181_5-26" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> returning to Rabaul on 18 December 1943.<sup id="cite_ref-ijnsubsiteI181_4-21" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> She began her third supply run on 21 December 1943, again bound for Buka,<sup id="cite_ref-ijnsubsiteI181_4-22" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-27" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> but after arriving at Buka on 22 December was unable to unload her cargo.<sup id="cite_ref-combinedfleetI181_5-28" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> She returned to Rabaul on 24 December 1943.<sup id="cite_ref-ijnsubsiteI181_4-23" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p><p><i>I-181</i> got underway from Rabaul on 28 December 1943 for her fourth supply run, heading for Sio.<sup id="cite_ref-ijnsubsiteI181_4-24" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-29" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> After delivering the cargo, she received orders to proceed to the waters north of <a href="/wiki/Choiseul_Island" title="Choiseul Island">Choiseul</a> in the Solomon Islands to intercept an Allied <a href="/wiki/Task_force" title="Task force">task force</a>.<sup id="cite_ref-ijnsubsiteI181_4-25" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-30" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> She did not find the Allied ships, and headed back for Rabaul. During her return voyage, she surfaced in <a href="/wiki/St._George%27s_Channel_(Papua_New_Guinea)" class="mw-redirect" title="St. George's Channel (Papua New Guinea)">St. George's Channel</a> on 3 January 1944 and rescued the <a href="/wiki/United_States_Marine_Corps" title="United States Marine Corps">United States Marine Corps</a> 26-kill <a href="/wiki/Flying_ace" title="Flying ace">ace</a> <a href="/wiki/Pappy_Boyington" title="Pappy Boyington">Gregory "Pappy" Boyington</a>, who had been shot down eight hours earlier during a <a href="/wiki/Fighter_aircraft" title="Fighter aircraft">fighter</a> sweep over Rabaul and was injured when he <a href="/wiki/Water_landing" title="Water landing">ditched</a> his <a href="/wiki/Vought_F4U_Corsair" title="Vought F4U Corsair">F4U Corsair</a> about 5 nautical miles (9.3 km; 5.8 mi) off shore.<sup id="cite_ref-combinedfleetI181_5-31" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> <i>I-181</i> arrived at Rabaul two hours later.<sup id="cite_ref-ijnsubsiteI181_4-26" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-32" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> After World War II, Boyington said that the best treatment he received while a <a href="/wiki/Prisoner-of-war" class="mw-redirect" title="Prisoner-of-war">prisoner-of-war</a> was during his time aboard <i>I-181</i>.<sup id="cite_ref-combinedfleetI181_5-33" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>On 6 January 1944, <i>I-181</i> began her fifth supply run.<sup id="cite_ref-ijnsubsiteI181_4-27" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-34" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> She unloaded her cargo at Buka on 7 January<sup id="cite_ref-combinedfleetI181_5-35" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> and headed back to Rabaul, arriving there on 9 January 1944.<sup id="cite_ref-ijnsubsiteI181_4-28" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-36" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>With the commander of Submarine Division 22 and his staff embarked, <i>I-181</i> departed Rabaul on 13 January 1944 on her sixth supply run in company with the submarine <a href="/wiki/Japanese_submarine_Ro-104" title="Japanese submarine Ro-104"><i>Ro-104</i></a>, bound for <a href="/w/index.php?title=Gali,_New_Guinea&action=edit&redlink=1" class="new" title="Gali, New Guinea (page does not exist)">Gali</a>, New Guinea.<sup id="cite_ref-ijnsubsiteI181_4-29" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-37" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> The Japanese never heard from <i>I-181</i> again.<sup id="cite_ref-combinedfleetI181_5-38" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Loss">Loss</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Japanese_submarine_I-181&action=edit&section=8" title="Edit section: Loss"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The circumstances of <i>I-181</i>′s loss remain unclear. The Japanese garrison at Gali reported witnessing a running battle in the <a href="/wiki/Vitiaz_Strait" title="Vitiaz Strait">Vitiaz Strait</a> off Gali on the evening of 16 January 1944 involving <i>I-181</i> and an unidentified American destroyer and <a href="/wiki/PT_boat" title="PT boat">PT boat</a> in which <i>I-181</i> was depth-charged and sunk with the loss of all on board.<sup id="cite_ref-ijnsubsiteI181_4-30" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-39" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> A widely reproduced photograph often is alleged to show the wreck of <i>I-181</i> aground in <a href="/wiki/Kelanoa_Harbour" title="Kelanoa Harbour">Kelanoa Harbour</a> on the coast of New Guinea, leading to the assertion by some sources that she <a href="/wiki/Ship_grounding" title="Ship grounding">ran aground</a> and was destroyed with the loss of all hands during the battle on 16 January 1944,<sup id="cite_ref-combinedfleetI181_5-40" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> but the photograph actually shows the wreckage of a large <a href="/wiki/Towing" title="Towing">towed</a> Japanese supply container destroyed on 24 December 1943 by the U.S. Navy PT boats <span class="nowrap"><i><a href="/w/index.php?title=Patrol_torpedo_boat_PT-151&action=edit&redlink=1" class="new" title="Patrol torpedo boat PT-151 (page does not exist)">PT-151</a></i></span> and <span class="nowrap"><i><a href="/w/index.php?title=Patrol_torpedo_boat_PT-192&action=edit&redlink=1" class="new" title="Patrol torpedo boat PT-192 (page does not exist)">PT-192</a></i></span>.<sup id="cite_ref-combinedfleetI181_5-41" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> Some sources claim U.S. Navy aircraft sank <i>I-181</i> in St. George's Channel on 16 January 1944.<sup id="cite_ref-combinedfleetI181_5-42" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>At 23:00 on 18 January 1944, the U.S. Navy PT boat <span class="nowrap"><i><a href="/wiki/Patrol_torpedo_boat_PT-143" title="Patrol torpedo boat PT-143">PT-143</a></i></span> detected a target on radar about 27 nautical miles (50 km; 31 mi) bearing 150 degrees True from <a href="/wiki/Gasmata" title="Gasmata">Gasmata</a> on the south coast of New Britain, and after closing to a range of 200 yards (183 m) in limited visibility identified it as a Japanese "<a href="/wiki/I-61-class_submarine" class="mw-redirect" title="I-61-class submarine"><i>I-61</i>-class</a>" submarine.<sup id="cite_ref-lidster_6-0" class="reference"><a href="#cite_note-lidster-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> The submarine submerged and <i>PT-143</i> dropped two depth charges — set to explode at a depth of 50 feet (15 m) — ahead of the submarine's <a href="/wiki/Wake_(physics)" title="Wake (physics)">wake</a> about 25 nautical miles (46 km; 29 mi) bearing 150 degrees True from Gasmata.<sup id="cite_ref-lidster_6-1" class="reference"><a href="#cite_note-lidster-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> <i>PT-143</i>′s crew heard a third explosion after the two depth charges detonated, but found no evidence that the depth charges damaged the submarine despite searching a 5-nautical-mile (9.3 km; 5.8 mi) area around the location of the attack until 03:00 on 19 January 1944.<sup id="cite_ref-lidster_6-2" class="reference"><a href="#cite_note-lidster-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p><p>At 03:01 on 21 January 1944, while patrolling 3 nautical miles (5.6 km; 3.5 mi) north of the coast of New Guinea off Weber Point, the PT boats <span class="nowrap"><i><a href="/w/index.php?title=Patrol_torpedo_boat_PT-329&action=edit&redlink=1" class="new" title="Patrol torpedo boat PT-329 (page does not exist)">PT-329</a></i></span>, <span class="nowrap"><i><a href="/w/index.php?title=Patrol_torpedo_boat_PT-362&action=edit&redlink=1" class="new" title="Patrol torpedo boat PT-362 (page does not exist)">PT-362</a></i></span> and <span class="nowrap"><i><a href="/w/index.php?title=Patrol_torpedo_boat_PT-364&action=edit&redlink=1" class="new" title="Patrol torpedo boat PT-364 (page does not exist)">PT-364</a></i></span> detected a target on radar and closed with it, visually identifying it as a large submarine and tentatively describing her as having a <a href="/wiki/Flush_deck" title="Flush deck">flush deck</a>, a <a href="/wiki/Conning_tower" title="Conning tower">conning tower</a> disproportionately long and tall for her length, and no visible deck armament.<sup id="cite_ref-Everett_7-0" class="reference"><a href="#cite_note-Everett-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> The submarine submerged when the PT boats closed to 4,500 yards (4,100 m).<sup id="cite_ref-Everett_7-1" class="reference"><a href="#cite_note-Everett-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> The PT boats again detected the submarine on radar at 06:06, and it submerged again at a range of 2.75 nautical miles (5.09 km; 3.16 mi).<sup id="cite_ref-Everett_7-2" class="reference"><a href="#cite_note-Everett-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> <i>PT-364</i> dropped one depth charge 4 nautical miles (7.4 km; 4.6 mi) to the north and another 3 nautical miles (5.6 km; 3.5 mi) to the north in an attempt to drive the submerged submarine toward the waiting <i>PT-329</i> and <i>PT-364</i>, but none of the PT boats gained any further contact on the submarine.<sup id="cite_ref-Everett_7-3" class="reference"><a href="#cite_note-Everett-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p><p>On 1 March 1944, the Imperial Japanese Navy declared <i>I-181</i> to be presumed lost with all 89 men aboard southwest of New Guinea.<sup id="cite_ref-ijnsubsiteI181_4-31" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-43" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> The Japanese struck her from the <a href="/wiki/Navy_List" class="mw-redirect" title="Navy List">Navy List</a> on 30 April 1944.<sup id="cite_ref-ijnsubsiteI181_4-32" class="reference"><a href="#cite_note-ijnsubsiteI181-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-combinedfleetI181_5-44" class="reference"><a href="#cite_note-combinedfleetI181-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Japanese_submarine_I-181&action=edit&section=9" title="Edit section: Notes"><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 reflist-columns references-column-width" style="column-width: 30em;"> <ol class="references"> <li id="cite_note-cd3-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-cd3_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-cd3_1-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-cd3_1-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text">Carpenter & Polmar, p. 105</span> </li> <li id="cite_note-c5-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-c5_2-0">^</a></b></span> <span class="reference-text">Chesneau, p. 199</span> </li> <li id="cite_note-b4-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-b4_3-0">^</a></b></span> <span class="reference-text">Bagnasco, pp. 183, 186</span> </li> <li id="cite_note-ijnsubsiteI181-4"><span class="mw-cite-backlink">^ <a href="#cite_ref-ijnsubsiteI181_4-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-5"><sup><i><b>f</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-6"><sup><i><b>g</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-7"><sup><i><b>h</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-8"><sup><i><b>i</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-9"><sup><i><b>j</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-10"><sup><i><b>k</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-11"><sup><i><b>l</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-12"><sup><i><b>m</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-13"><sup><i><b>n</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-14"><sup><i><b>o</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-15"><sup><i><b>p</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-16"><sup><i><b>q</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-17"><sup><i><b>r</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-18"><sup><i><b>s</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-19"><sup><i><b>t</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-20"><sup><i><b>u</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-21"><sup><i><b>v</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-22"><sup><i><b>w</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-23"><sup><i><b>x</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-24"><sup><i><b>y</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-25"><sup><i><b>z</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-26"><sup><i><b>aa</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-27"><sup><i><b>ab</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-28"><sup><i><b>ac</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-29"><sup><i><b>ad</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-30"><sup><i><b>ae</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-31"><sup><i><b>af</b></i></sup></a> <a href="#cite_ref-ijnsubsiteI181_4-32"><sup><i><b>ag</b></i></sup></a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.ijnsubsite.info/I-Sub%20Details/I-181.htm">I-181 ijnsubsite.com December 1, 2018 Accessed 17 June 2022</a></span> </li> <li id="cite_note-combinedfleetI181-5"><span class="mw-cite-backlink">^ <a href="#cite_ref-combinedfleetI181_5-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-5"><sup><i><b>f</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-6"><sup><i><b>g</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-7"><sup><i><b>h</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-8"><sup><i><b>i</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-9"><sup><i><b>j</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-10"><sup><i><b>k</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-11"><sup><i><b>l</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-12"><sup><i><b>m</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-13"><sup><i><b>n</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-14"><sup><i><b>o</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-15"><sup><i><b>p</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-16"><sup><i><b>q</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-17"><sup><i><b>r</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-18"><sup><i><b>s</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-19"><sup><i><b>t</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-20"><sup><i><b>u</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-21"><sup><i><b>v</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-22"><sup><i><b>w</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-23"><sup><i><b>x</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-24"><sup><i><b>y</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-25"><sup><i><b>z</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-26"><sup><i><b>aa</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-27"><sup><i><b>ab</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-28"><sup><i><b>ac</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-29"><sup><i><b>ad</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-30"><sup><i><b>ae</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-31"><sup><i><b>af</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-32"><sup><i><b>ag</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-33"><sup><i><b>ah</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-34"><sup><i><b>ai</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-35"><sup><i><b>aj</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-36"><sup><i><b>ak</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-37"><sup><i><b>al</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-38"><sup><i><b>am</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-39"><sup><i><b>an</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-40"><sup><i><b>ao</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-41"><sup><i><b>ap</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-42"><sup><i><b>aq</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-43"><sup><i><b>ar</b></i></sup></a> <a href="#cite_ref-combinedfleetI181_5-44"><sup><i><b>as</b></i></sup></a></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 id="CITEREFHackettKingsepp2016" class="citation web cs1">Hackett, Bob; Kingsepp, Sander (1 March 2016). <a rel="nofollow" class="external text" href="http://www.combinedfleet.com/I-181.htm">"IJN Submarine I-181: Tabular Record of Movement"</a>. <i>combinedfleet.com</i><span class="reference-accessdate">. Retrieved <span class="nowrap">17 June</span> 2022</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=combinedfleet.com&rft.atitle=IJN+Submarine+I-181%3A+Tabular+Record+of+Movement&rft.date=2016-03-01&rft.aulast=Hackett&rft.aufirst=Bob&rft.au=Kingsepp%2C+Sander&rft_id=http%3A%2F%2Fwww.combinedfleet.com%2FI-181.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AJapanese+submarine+I-181" class="Z3988"></span></span> </li> <li id="cite_note-lidster-6"><span class="mw-cite-backlink">^ <a href="#cite_ref-lidster_6-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-lidster_6-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-lidster_6-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://www.fold3.com/image/272049566">Lidster, LT(jg) Allen Y., "Report of Action With Enemy Submarine night of 18/19 January 1944," Motor Torpedo Boat Squadron Eight, 20 January 1944</a></span> </li> <li id="cite_note-Everett-7"><span class="mw-cite-backlink">^ <a href="#cite_ref-Everett_7-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Everett_7-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Everett_7-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-Everett_7-3"><sup><i><b>d</b></i></sup></a></span> <span class="reference-text">[Everett, C.F., "Action Report, concerning two submarine contacts night of 20/21 January 1944," Motor Torpedo Boat Squadron Twelve, 23 January 1944]</span> </li> </ol></div> <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=Japanese_submarine_I-181&action=edit&section=10" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBagnasco1977" class="citation book cs1">Bagnasco, Erminio (1977). <i>Submarines of World War Two</i>. Annapolis, Maryland: Naval Institute Press. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-87021-962-6" title="Special:BookSources/0-87021-962-6"><bdi>0-87021-962-6</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Submarines+of+World+War+Two&rft.place=Annapolis%2C+Maryland&rft.pub=Naval+Institute+Press&rft.date=1977&rft.isbn=0-87021-962-6&rft.aulast=Bagnasco&rft.aufirst=Erminio&rfr_id=info%3Asid%2Fen.wikipedia.org%3AJapanese+submarine+I-181" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFCarpenterPolmar1986" class="citation book cs1">Carpenter, Dorr B. & Polmar, Norman (1986). <i>Submarines of the Imperial Japanese Navy 1904–1945</i>. London: Conway Maritime Press. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-85177-396-6" title="Special:BookSources/0-85177-396-6"><bdi>0-85177-396-6</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Submarines+of+the+Imperial+Japanese+Navy+1904%E2%80%931945&rft.place=London&rft.pub=Conway+Maritime+Press&rft.date=1986&rft.isbn=0-85177-396-6&rft.aulast=Carpenter&rft.aufirst=Dorr+B.&rft.au=Polmar%2C+Norman&rfr_id=info%3Asid%2Fen.wikipedia.org%3AJapanese+submarine+I-181" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFChesneau1980" class="citation book cs1">Chesneau, Roger, ed. (1980). <i>Conway's All the World's Fighting Ships 1922–1946</i>. Greenwich, UK: Conway Maritime Press. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-85177-146-7" title="Special:BookSources/0-85177-146-7"><bdi>0-85177-146-7</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Conway%27s+All+the+World%27s+Fighting+Ships+1922%E2%80%931946&rft.place=Greenwich%2C+UK&rft.pub=Conway+Maritime+Press&rft.date=1980&rft.isbn=0-85177-146-7&rfr_id=info%3Asid%2Fen.wikipedia.org%3AJapanese+submarine+I-181" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFJentschuraJungMickel1977" class="citation book cs1">Jentschura, Hansgeorg; Jung, Dieter & Mickel, Peter (1977). <i>Warships of the Imperial Japanese Navy, 1869–1945</i>. Annapolis, Maryland: United States Naval Institute. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-87021-893-X" title="Special:BookSources/0-87021-893-X"><bdi>0-87021-893-X</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Warships+of+the+Imperial+Japanese+Navy%2C+1869%E2%80%931945&rft.place=Annapolis%2C+Maryland&rft.pub=United+States+Naval+Institute&rft.date=1977&rft.isbn=0-87021-893-X&rft.aulast=Jentschura&rft.aufirst=Hansgeorg&rft.au=Jung%2C+Dieter&rft.au=Mickel%2C+Peter&rfr_id=info%3Asid%2Fen.wikipedia.org%3AJapanese+submarine+I-181" class="Z3988"></span></li></ul> <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 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dd:first-child::before,.mw-parser-output .hlist dt dt:first-child::before,.mw-parser-output .hlist dt li:first-child::before,.mw-parser-output .hlist li dd:first-child::before,.mw-parser-output .hlist li dt:first-child::before,.mw-parser-output .hlist li li:first-child::before{content:" (";font-weight:normal}.mw-parser-output .hlist dd dd:last-child::after,.mw-parser-output .hlist dd dt:last-child::after,.mw-parser-output .hlist dd li:last-child::after,.mw-parser-output .hlist dt dd:last-child::after,.mw-parser-output .hlist dt dt:last-child::after,.mw-parser-output .hlist dt li:last-child::after,.mw-parser-output .hlist li dd:last-child::after,.mw-parser-output .hlist li dt:last-child::after,.mw-parser-output .hlist li li:last-child::after{content:")";font-weight:normal}.mw-parser-output .hlist ol{counter-reset:listitem}.mw-parser-output .hlist ol>li{counter-increment:listitem}.mw-parser-output .hlist ol>li::before{content:" "counter(listitem)"\a0 "}.mw-parser-output .hlist dd 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td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Kaidai-type_submarines" style=";wide;padding:3px"><table class="nowraplinks hlist mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2" style="background-color:#C3D6EF;color:inherit;"><div id="Kaidai-type_submarines" style="font-size:114%;margin:0 4em"><a href="/wiki/Kaidai-type_submarine" title="Kaidai-type submarine">Kaidai-type submarines</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;text-align:left;"><a href="/wiki/Kaidai-type_submarine#Kaidai_I_(I-51_class)" title="Kaidai-type submarine"><i>I-51</i> class (Type KD1)</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/Japanese_submarine_I-51" title="Japanese submarine I-51"><i>I-51</i></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;text-align:left;"><a href="/wiki/Kaidai-type_submarine#Kaidai_II_(I-152_class)" title="Kaidai-type submarine"><i>I-152</i> class (Type KD2)</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/Japanese_submarine_I-152" title="Japanese submarine I-152"><i>I-52</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-152" title="Japanese submarine I-152"><i>I-152</i></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;text-align:left;"><a href="/wiki/Kaidai-type_submarine#Kaidai_IIIa/b_(I-153_class_and_I-156_class)" title="Kaidai-type submarine"><i>I-153</i> class and <i>I-156</i> class (Type KD3)</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/Japanese_submarine_I-53_(1925)" title="Japanese submarine I-53 (1925)"><i>I-53</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-53_(1925)" title="Japanese submarine I-53 (1925)"><i>I-153</i></a></li> <li><a href="/wiki/Japanese_submarine_I-54_(1926)" title="Japanese submarine I-54 (1926)"><i>I-54</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-54_(1926)" title="Japanese submarine I-54 (1926)"><i>I-154</i></a></li> <li><a href="/wiki/Japanese_submarine_I-55_(1925)" title="Japanese submarine I-55 (1925)"><i>I-55</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-55_(1925)" title="Japanese submarine I-55 (1925)"><i>I-155</i></a></li> <li><a href="/wiki/Japanese_submarine_I-156" title="Japanese submarine I-156"><i>I-56</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-156" title="Japanese submarine I-156"><i>I-156</i></a></li> <li><a href="/wiki/Japanese_submarine_I-157" title="Japanese submarine I-157"><i>I-57</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-157" title="Japanese submarine I-157"><i>I-157</i></a></li> <li><a href="/wiki/Japanese_submarine_I-158" title="Japanese submarine I-158"><i>I-58</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-158" title="Japanese submarine I-158"><i>I-158</i></a></li> <li><a href="/wiki/Japanese_submarine_I-159" title="Japanese submarine I-159"><i>I-59</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-159" title="Japanese submarine I-159"><i>I-159</i></a></li> <li><a href="/wiki/Japanese_submarine_I-60" title="Japanese submarine I-60"><i>I-60</i></a></li> <li><a href="/wiki/Japanese_submarine_I-63" title="Japanese submarine I-63"><i>I-63</i></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;text-align:left;"><a href="/wiki/Kaidai-type_submarine#Kaidai_IV_(I-61/162_class)" title="Kaidai-type submarine"><i>I-162</i> class (Type KD4)</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/Japanese_submarine_I-61" title="Japanese submarine I-61"><i>I-61</i></a></li> <li><a href="/wiki/Japanese_submarine_I-162" title="Japanese submarine I-162"><i>I-62</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-162" title="Japanese submarine I-162"><i>I-162</i></a></li> <li><a href="/wiki/Japanese_submarine_I-164" class="mw-redirect" title="Japanese submarine I-164"><i>I-64</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-64" title="Japanese submarine I-64"><i>I-164</i></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;text-align:left;"><a href="/wiki/Kaidai-type_submarine#Kaidai_V_(I-165_class)" title="Kaidai-type submarine"><i>I-165</i> class (Type KD5)</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/Japanese_submarine_I-165" title="Japanese submarine I-165"><i>I-65</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-165" title="Japanese submarine I-165"><i>I-165</i></a></li> <li><a href="/wiki/Japanese_submarine_I-166" title="Japanese submarine I-166"><i>I-66</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-166" title="Japanese submarine I-166"><i>I-166</i></a></li> <li><a href="/wiki/Japanese_submarine_I-67" title="Japanese submarine I-67"><i>I-67</i></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;text-align:left;"><a href="/wiki/Kaidai-type_submarine#Kaidai_VIa/b_(I-168_class_and_I-174_class)" title="Kaidai-type submarine"><i>I-168</i> class and <i>I-174</i> class (Type KD6)</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/Japanese_submarine_I-168" title="Japanese submarine I-168"><i>I-68</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-168" title="Japanese submarine I-168"><i>I-168</i></a></li> <li><a href="/wiki/Japanese_submarine_I-169" title="Japanese submarine I-169"><i>I-69</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-169" title="Japanese submarine I-169"><i>I-169</i></a></li> <li><a href="/wiki/Japanese_submarine_I-70" title="Japanese submarine I-70"><i>I-70</i></a></li> <li><a href="/wiki/Japanese_submarine_I-171" title="Japanese submarine I-171"><i>I-71</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-171" title="Japanese submarine I-171"><i>I-171</i></a></li> <li><a href="/wiki/Japanese_submarine_I-72" title="Japanese submarine I-72"><i>I-72</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-72" title="Japanese submarine I-72"><i>I-172</i></a></li> <li><a href="/wiki/Japanese_submarine_I-73" title="Japanese submarine I-73"><i>I-73</i></a></li> <li><a href="/wiki/Japanese_submarine_I-174" title="Japanese submarine I-174"><i>I-74</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-174" title="Japanese submarine I-174"><i>I-174</i></a></li> <li><a href="/wiki/Japanese_submarine_I-175" title="Japanese submarine I-175"><i>I-75</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-175" title="Japanese submarine I-175"><i>I-175</i></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;text-align:left;"><a href="/wiki/Kaidai-type_submarine#Kaidai_VII_(I-176_class)" title="Kaidai-type submarine"><i>I-176</i> class (Type KD7/Shin-Kaidai Type)</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/Japanese_submarine_I-176" title="Japanese submarine I-176"><i>I-76</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-176" title="Japanese submarine I-176"><i>I-176</i></a></li> <li><a href="/wiki/Japanese_submarine_I-177" title="Japanese submarine I-177"><i>I-77</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-177" title="Japanese submarine I-177"><i>I-177</i></a></li> <li><a href="/wiki/Japanese_submarine_I-178" title="Japanese submarine I-178"><i>I-78</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-178" title="Japanese submarine I-178"><i>I-178</i></a></li> <li><a href="/wiki/Japanese_submarine_I-179" title="Japanese submarine I-179"><i>I-79</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-179" title="Japanese submarine I-179"><i>I-179</i></a></li> <li><a href="/wiki/Japanese_submarine_I-180" title="Japanese submarine I-180"><i>I-80</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-180" title="Japanese submarine I-180"><i>I-180</i></a></li> <li><a class="mw-selflink selflink"><i>I-81</i></a> ⁄ <a class="mw-selflink selflink"><i>I-181</i></a></li> <li><a href="/wiki/Japanese_submarine_I-182" title="Japanese submarine I-182"><i>I-82</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-182" title="Japanese submarine I-182"><i>I-182</i></a></li> <li><a href="/wiki/Japanese_submarine_I-183" title="Japanese submarine I-183"><i>I-83</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-183" title="Japanese submarine I-183"><i>I-183</i></a></li> <li><a href="/wiki/Japanese_submarine_I-184" title="Japanese submarine I-184"><i>I-84</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-184" title="Japanese submarine I-184"><i>I-184</i></a></li> <li><a href="/wiki/Japanese_submarine_I-185" title="Japanese submarine I-185"><i>I-85</i></a> ⁄ <a href="/wiki/Japanese_submarine_I-185" title="Japanese submarine I-185"><i>I-185</i></a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2" style="background-color:#DCDCDC;color:inherit;"><div> <ul><li><a href="/wiki/Imperial_Japanese_Navy_submarines" class="mw-redirect" title="Imperial Japanese Navy submarines">Imperial Japanese Navy submarines</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Shipwrecks_and_maritime_incidents_in_January_1944" style="padding:3px"><table class="nowraplinks mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:January_1944_shipwrecks" title="Template:January 1944 shipwrecks"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:January_1944_shipwrecks" title="Template talk:January 1944 shipwrecks"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:January_1944_shipwrecks" title="Special:EditPage/Template:January 1944 shipwrecks"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Shipwrecks_and_maritime_incidents_in_January_1944" style="font-size:114%;margin:0 4em">Shipwrecks and maritime incidents in January 1944</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/List_of_shipwrecks_in_January_1944" title="List of shipwrecks in January 1944">Shipwrecks</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><span class="nowrap">1 Jan: <i><a href="/wiki/Nagoya_Maru" title="Nagoya Maru">Nagoya Maru</a></i></span></li> <li><span class="nowrap">2 Jan: <a href="/wiki/SS_Albert_Gallatin" title="SS Albert Gallatin"><i>Albert Gallatin</i></a></span></li> <li><span class="nowrap">3 Jan: <a href="/wiki/USS_Turner_(DD-648)" title="USS Turner (DD-648)">USS <i>Turner</i></a></span></li> <li><span class="nowrap">6 Jan: <a href="/wiki/USS_St._Augustine" title="USS St. Augustine">USS <i>St. Augustine</i></a></span></li> <li><span class="nowrap">8 Jan: <a href="/wiki/German_submarine_U-426" title="German submarine U-426"><i>U-426</i></a>, <a href="/wiki/German_submarine_U-757" title="German submarine U-757"><i>U-757</i></a></span></li> <li><span class="nowrap">9 Jan: <a href="/wiki/German_submarine_U-81_(1941)" title="German submarine U-81 (1941)"><i>U-81</i></a></span></li> <li><span class="nowrap">10 Jan: <a href="/wiki/SS_Daniel_Webster" title="SS Daniel Webster"><i>Daniel Webster</i></a></span></li> <li><span class="nowrap">11 Jan: <a href="/wiki/Japanese_submarine_I-11" title="Japanese submarine I-11"><i>I-11</i></a>, <a href="/wiki/Japanese_cruiser_Kuma" title="Japanese cruiser Kuma"><i>Kuma</i></a></span></li> <li><span class="nowrap">13 Jan: <a href="/wiki/German_submarine_U-231" title="German submarine U-231"><i>U-231</i></a></span></li> <li><span class="nowrap">14 Jan: <i><a href="/wiki/Type_A_Ko-hyoteki-class_submarine" class="mw-redirect" title="Type A Ko-hyoteki-class submarine">Ha-50</a></i>, <a href="/wiki/Japanese_destroyer_Sazanami_(1931)" title="Japanese destroyer Sazanami (1931)"><i>Sazanami</i></a></span></li> <li><span class="nowrap">16 Jan: <a class="mw-selflink selflink"><i>I-181</i></a>, <a href="/wiki/USS_Macaw" title="USS Macaw">USS <i>Macaw</i></a>, <a href="/wiki/German_submarine_U-544" title="German submarine U-544"><i>U-544</i></a></span></li> <li><span class="nowrap">17 Jan: <i><a href="/wiki/Type_A_Ko-hyoteki-class_submarine" class="mw-redirect" title="Type A Ko-hyoteki-class submarine">Ha-51</a></i></span></li> <li><span class="nowrap">18 Jan: <a href="/wiki/SS_Yoshida_Maru" title="SS Yoshida Maru"><i>Yoshida Maru</i></a></span></li> <li><span class="nowrap">19 Jan: <a href="/wiki/German_submarine_U-641" title="German submarine U-641"><i>U-641</i></a></span></li> <li><span class="nowrap">20 Jan: <a href="/wiki/German_submarine_U-263" title="German submarine U-263"><i>U-263</i></a></span></li> <li><span class="nowrap">22 Jan: <a href="/wiki/USS_Portent" title="USS Portent">USS <i>Portent</i></a>, <a href="/wiki/Japanese_submarine_Ro-37" title="Japanese submarine Ro-37"><i>Ro-37</i></a></span></li> <li><span class="nowrap">23 Jan: <a href="/wiki/HMS_Janus_(F53)" title="HMS Janus (F53)">HMS <i>Janus</i></a></span></li> <li><span class="nowrap">24 Jan: <a href="/wiki/Japanese_minelayer_Magane_Maru" title="Japanese minelayer Magane Maru"><i>Magane Maru</i></a>, <a href="/wiki/TSS_St_David_(1931)" title="TSS St David (1931)"><i>St David</i></a></span></li> <li><span class="nowrap">25 Jan: <a href="/wiki/Japanese_destroyer_Suzukaze" title="Japanese destroyer Suzukaze"><i>Suzukaze</i></a></span></li> <li><span class="nowrap">26 Jan <a href="/wiki/HM_LST-411" title="HM LST-411"><i>LST-411</i></a>, <a href="/wiki/HM_LST-422" title="HM LST-422"><i>LST-422</i></a></span></li> <li><span class="nowrap">28 Jan: <i><a href="/wiki/Type_A_Ko-hyoteki-class_submarine" class="mw-redirect" title="Type A Ko-hyoteki-class submarine">Ha-49</a></i>, <a href="/wiki/German_trawler_V_107_Botilla_Russ" title="German trawler V 107 Botilla Russ"><i>Sperrbrecher 137</i></a>, <a href="/wiki/German_submarine_U-271" title="German submarine U-271"><i>U-271</i></a>, <a href="/wiki/German_submarine_U-571" title="German submarine U-571"><i>U-571</i></a></span></li> <li><span class="nowrap">29 Jan: <a href="/wiki/SS_Samuel_Huntington" title="SS Samuel Huntington"><i>Samuel Huntington</i></a>, <a href="/wiki/HMS_Spartan_(95)" title="HMS Spartan (95)">HMS <i>Spartan</i></a>, <a href="/wiki/German_submarine_U-364" title="German submarine U-364"><i>U-364</i></a></span></li> <li><span class="nowrap">30 Jan: <a href="/wiki/Japanese_submarine_chaser_Cha-14" title="Japanese submarine chaser Cha-14"><i>Cha-14</i></a>, <a href="/wiki/Japanese_submarine_chaser_Cha-19" title="Japanese submarine chaser Cha-19"><i>Cha-19</i></a>, <a href="/wiki/Japanese_submarine_chaser_Cha-28" title="Japanese submarine chaser Cha-28"><i>Cha-28</i></a>, <a href="/wiki/HMS_Hardy_(R08)" title="HMS Hardy (R08)">HMS <i>Hardy</i></a>, <a href="/wiki/Japanese_minesweeper_Tama_Maru_No._3" title="Japanese minesweeper Tama Maru No. 3"><i>Tama Maru No. 3</i></a>, <a href="/wiki/German_submarine_U-314" title="German submarine U-314"><i>U-314</i></a></span></li> <li><span class="nowrap">31 Jan: <a href="/wiki/German_submarine_U-592" title="German submarine U-592"><i>U-592</i></a>, <i><a href="/wiki/Yasukuni_Maru" title="Yasukuni Maru">Yasukuni Maru</a></i></span></li> <li><span class="nowrap">Unknown date: <a href="/wiki/USS_Scorpion_(SS-278)" title="USS Scorpion (SS-278)">USS <i>Scorpion</i></a>, <a href="/wiki/German_submarine_U-305" title="German submarine U-305"><i>U-305</i></a>, <a href="/wiki/German_submarine_U-377" title="German submarine U-377"><i>U-377</i></a></span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other incidents</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><span class="nowrap">1 Jan: <a href="/wiki/USS_Jack_(SS-259)" title="USS Jack (SS-259)">USS <i>Jack</i></a></span></li> <li><span class="nowrap">16 Jan: <a href="/wiki/USS_Flier" title="USS Flier">USS <i>Flier</i></a></span></li> <li><span class="nowrap">30 Jan: <a href="/wiki/Japanese_submarine_I-6" title="Japanese submarine I-6"><i>I-6</i></a></span></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div><a href="/wiki/List_of_shipwrecks_in_1943" title="List of shipwrecks in 1943">1943</a> <span typeof="mw:File"><a href="/wiki/List_of_shipwrecks_in_1943" title="List of shipwrecks in 1943"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/27/Arrow_Blue_Left_001.svg/12px-Arrow_Blue_Left_001.svg.png" decoding="async" width="12" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/27/Arrow_Blue_Left_001.svg/18px-Arrow_Blue_Left_001.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/27/Arrow_Blue_Left_001.svg/24px-Arrow_Blue_Left_001.svg.png 2x" data-file-width="100" data-file-height="100" /></a></span> <a href="/wiki/List_of_shipwrecks_in_1944" title="List of shipwrecks in 1944">1944</a> <span typeof="mw:File"><a href="/wiki/List_of_shipwrecks_in_1945" title="List of shipwrecks in 1945"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/45/Arrow_Blue_Right_001.svg/12px-Arrow_Blue_Right_001.svg.png" decoding="async" width="12" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/45/Arrow_Blue_Right_001.svg/18px-Arrow_Blue_Right_001.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/45/Arrow_Blue_Right_001.svg/24px-Arrow_Blue_Right_001.svg.png 2x" data-file-width="100" data-file-height="100" /></a></span> <a href="/wiki/List_of_shipwrecks_in_1945" title="List of shipwrecks in 1945">1945</a> <br /><a href="/wiki/List_of_shipwrecks_in_December_1943" title="List of shipwrecks in December 1943">December 1943</a> <span typeof="mw:File"><a href="/wiki/List_of_shipwrecks_in_December_1943" title="List of shipwrecks in December 1943"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/27/Arrow_Blue_Left_001.svg/12px-Arrow_Blue_Left_001.svg.png" decoding="async" width="12" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/27/Arrow_Blue_Left_001.svg/18px-Arrow_Blue_Left_001.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/27/Arrow_Blue_Left_001.svg/24px-Arrow_Blue_Left_001.svg.png 2x" data-file-width="100" data-file-height="100" /></a></span> <span typeof="mw:File"><a href="/wiki/List_of_shipwrecks_in_February_1944" title="List of shipwrecks in February 1944"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/45/Arrow_Blue_Right_001.svg/12px-Arrow_Blue_Right_001.svg.png" decoding="async" width="12" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/45/Arrow_Blue_Right_001.svg/18px-Arrow_Blue_Right_001.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/45/Arrow_Blue_Right_001.svg/24px-Arrow_Blue_Right_001.svg.png 2x" data-file-width="100" data-file-height="100" /></a></span> <a href="/wiki/List_of_shipwrecks_in_February_1944" title="List of shipwrecks in February 1944">February 1944</a></div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" 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=Japanese_submarine_I-181&oldid=1237824514">https://en.wikipedia.org/w/index.php?title=Japanese_submarine_I-181&oldid=1237824514</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">Categories</a>: <ul><li><a href="/wiki/Category:1942_ships" title="Category:1942 ships">1942 ships</a></li><li><a href="/wiki/Category:Ships_built_by_Kure_Naval_Arsenal" title="Category:Ships built by Kure Naval Arsenal">Ships built by Kure Naval Arsenal</a></li><li><a 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