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SM U-90
SM ''U-90'' was a Type U 87 u-boat of the Imperial German Navy during World War I. Its commander Walter Remy made regular stops at remote island North Rona for provisions such as fresh mutton. On 15 May 1918, ''U-90'' shelled the Hirta wireless station in St Kilda, Scotland. On 31 May 1918, ''U-90'' torpedoed and sank , a former Hamburg America Line steamer that seized by the United States for troop transportation. From the U.S. Navy crew that abandoned the sinking vessel, ''U-90'' captured ''Lieutenant'' Edouard Izac, eventually taking him to Germany. Izac later escaped German captivity and reported to the US Navy about German submarine movements.
==Design==
German Type U 87 submarines were preceded by the shorter Type U 81 submarines. ''U-90'' had a displacement of when at the surface and while submerged. It 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 engines for use while surfaced, and two engines for use while submerged. It had two shafts and two propellers. It 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, it could travel at . ''U-90'' was fitted with four torpedo tubes (two at the bow and two at the stern), ten to twelve torpedoes, one deck machine gun, and one deck machine gun. It had a complement of thirty-six (thirty-two crew members and four officers).
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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