| 翻訳と辞書 | SM UC-57 
 SM ''UC-57'' was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy ((ドイツ語:Kaiserliche Marine)) during World War I. The U-boat was ordered on 12 January 1916, laid down on 14 March 1916, and was launched on 7 September 1916. She was commissioned into the German Imperial Navy on 22 January 1917 as SM ''UC-57''.〔"SM" stands for "Seiner Majestät" ((英語:His Majesty's)) and combined with the ''U'' for ''Unterseeboot'' would be translated as ''His Majesty's Submarine''.〕 In 7 patrols ''UC-57'' was credited with sinking 5 ships, either by torpedo or by mines laid.
 ''UC-57'' disappeared in 1917 after landing a party of Finnish Jägers and 4 tons of munitions on the island of Hamnskär, circa  from Loviisa, on 18 November. ''UC-57'' was going to remain on the seabed overnight and then return to Germany but never arrived. She was probably sunk by a Russian mine.〔
 ==Design==
 A German Type UC II submarine, ''UC-57'' had a displacement of  when at the surface and  while submerged. It had a total length of , a beam of ,〔 and a draught of .〔 The submarine was powered by two six-cylinder four-stroke diesel engines each producing  (a total of , two electric motors each producing , and two propeller shafts. It had a dive time of 48 seconds〔 and was capable of operating at a depth of .〔
 The submarine had a maximum surface speed of  and a submerged speed of . When submerged, it could operate for  at ; when surfaced, it could travel  at .〔 ''UC-57'' was fitted with six  mine tubes,〔 eighteen UC 200 mines, three  torpedo tubes (one on the stern and two on the bow), seven torpedoes, and one  KL/30 deck gun.〔 Its complement was twenty-six crew members.〔
 
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