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German submarine U-171 : ウィキペディア英語版 | German submarine U-171
German submarine ''U-171'' was a Type IXC U-boat of Nazi Germany's ''Kriegsmarine'' built for service during World War II. The submarine was laid down on 1 December 1940 at the DeSchiMAG AG Weser yard at Bremen as yard number 1011; it was launched on 22 July 1941 and commissioned on 25 October 1941 under the command of ''Kapitänleutnant'' Günther Pfeffer. After training with the ''4th U-boat Flotilla'', ''U-171'' was transferred to the ''10th U-boat Flotilla'' for front-line service on 1 July 1942. It was sent to patrol in the Gulf of Mexico and was sunk by a naval mine in the Bay of Biscay 115 days into its first, and only patrol whilst returning to Lorient in occupied France, with the loss of 22 of its complement of 54.〔(【引用サイトリンク】 title=U-171 )〕 For many years it was believed that had been sunk by an American aircraft in what had in reality been an unsuccessful attack on this submarine in the Gulf of Mexico. ==Design== German Type IXC submariness were slightly larger than the original Type IXBs. ''U-171'' had a displacement of when at the surface and while submerged. The U-boat had a total length of , a pressure hull length of , a beam of , a height of , and a draught of . The submarine was powered by two MAN M 9 V 40/46 supercharged four-stroke, nine-cylinder diesel engines producing a total of for use while surfaced, two Siemens-Schuckert 2 GU 345/34 double-acting electric motors producing a total of for use while submerged. She had two shafts and two propellers. The boat was capable of operating at depths of up to . The submarine had a maximum surface speed of and a maximum submerged speed of . When submerged, it could operate for at ; when surfaced, she could travel at . ''U-171'' was fitted with six torpedo tubes (four fitted at the bow and two at the stern), 22 torpedoes, one , 180 rounds, and a as well as a anti-aircraft gun. The boat had a complement of forty-eight.
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