| 词条 | German submarine U-731 | ||||||||||||||||||||||||||||||||||||||||
| 释义 |
German submarine U-731 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 1 October 1941 at the Schichau-Werke yard at Danzig, launched on 25 July 1942, and commissioned on 3 October 1942 under the command of Oberleutnant zur See Werner Techand. Attached to 8th U-boat Flotilla based at Kiel, U-731 completed her training period on 30 April 1943 and was assigned to front-line service. DesignGerman Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-731 had a displacement of {{convert|769|t|LT}} when at the surface and {{convert|871|t|LT}} while submerged.{{sfn|Gröner|1991|pp=43-46}} She had a total length of {{convert|67.10|m|ftin|abbr=on}}, a pressure hull length of {{convert|50.50|m|ftin|abbr=on}}, a beam of {{convert|6.20|m|ftin|abbr=on}}, a height of {{convert|9.60|m|ftin|abbr=on}}, and a draught of {{convert|4.74|m|ftin|abbr=on}}. The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of {{convert|2800 to 3200|PS|kW shp|-1}} for use while surfaced, two AEG GU 460/8–27 double-acting electric motors producing a total of {{convert|750|PS|kW shp}} for use while submerged. She had two shafts and two {{convert|1.23|m|ft|abbr=on|0}} propellers. The boat was capable of operating at depths of up to {{convert|230|m}}.{{sfn|Gröner|1991|pp=43-46}} The submarine had a maximum surface speed of {{convert|17.7|kn}} and a maximum submerged speed of {{convert|7.6|kn}}.{{sfn|Gröner|1991|pp=43-46}} When submerged, the boat could operate for {{convert|80|nmi}} at {{convert|4|kn}}; when surfaced, she could travel {{convert|8500|nmi}} at {{convert|10|kn}}. U-731 was fitted with five {{convert|53.3|cm|in|0|abbr=on}} torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one {{convert|8.8|cm|in|2|abbr=on}} SK C/35 naval gun, 220 rounds, and two twin {{convert|2|cm|in|sp=us|abbr=on}} C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.{{sfn|Gröner|1991|pp=43-46}} Service historyOn the fourth and final war patrol, U-731 was detected on 15 May 1944 by two Catalinas, P-14 and P-1, of VP-63 off Tangiers, when the U-boat tried to force the Strait of Gibraltar. Two British patrol craft, {{HMS|Kilmarnock}} and {{HMS|Blackfly|FY117|6}}, received reports of the U-boat and attacked with hedgehogs. U-731 was sunk in position {{coord|35|54|N|5|45|W|display=title, inline}}; all 54 crew members perished in the attack.{{sfn|Busch, Röll|1999|p=236}} ReferencesBibliography{{Refbegin}}
|last1=Busch |first1=Rainer |last2=Röll |first2=Hans-Joachim |title=Deutsche U-Boot-Verluste von September 1939 bis Mai 1945 |trans-title=German U-boat losses from September 1939 to May 1945 |work=Der U-Boot-Krieg |volume=IV |publisher=Mittler |location=Hamburg, Berlin, Bonn |year=1999 |isbn=3-8132-0514-2 |language=German |ref=harv }}
|last1=Gröner |first1=Erich |author-link1= |author-mask1= |last2=Jung |first2=Dieter |display-authors= |last-author-amp= |last3=Maass |first3=Martin |translator-last1=Thomas |translator-first1=Keith |translator-last2=Magowan |translator-first2=Rachel |year=1991 |title=U-boats and Mine Warfare Vessels |volume=2 |work=German Warships 1815–1945 |location=London |publisher=Conway Maritime Press |isbn=0-85177-593-4 |ref=CITEREFGr.C3.B6ner1991 }}{{Refend}} External links
|url=http://uboat.net/boats/u731.html |title=The Type VIIC boat U-731 |last=Helgason |first=Guðmundur |website=German U-boats of WWII - uboat.net |accessdate=23 July 2015 }}{{German Type VII submarines}}{{May 1944 shipwrecks}}{{Subject bar | portal1=Military of Germany | portal2=Submarine | portal3=World War II }}{{Use dmy dates|date=July 2015}}{{DEFAULTSORT:U0731}} 12 : German Type VIIC submarines|1942 ships|Ships built in Danzig|U-boats commissioned in 1942|U-boats sunk in 1944|U-boats sunk by depth charges|U-boats sunk by British warships|Maritime incidents in May 1944|World War II shipwrecks in the Atlantic Ocean|World War II submarines of Germany|Ships lost with all hands|Ships built by Schichau |
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