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German submarine U-997
German submarine ''U-997'' was a Type VIIC/41 U-boat built for Nazi Germany's ''Kriegsmarine'' for service during World War II.
She was laid down on 7 December 1942 by Blohm & Voss, Hamburg as yard number 197, launched on 18 August 1943 and commissioned on 23 September 1943 under ''Oberleutnant zur See'' Hans Lehmann.
==Design==
Like all Type VIIC/41 U-boats, ''U-977'' had a displacement of when at the surface and while submerged. She had a total length of , a pressure hull length of , a beam length of , and a draught length of . The submarine was powered by two Germaniawerft F46 supercharged six-cylinder four-stroke diesel engines producing a total of and two BBC GG UB 720/8 double-acting electric motors producing a total of for use while submerged. The boat was capable of operating at a depth of .
The submarine had a maximum surface speed of and a submerged speed of . When submerged, the boat could operate for at ; when surfaced, she could travel at . ''U-977'' was fitted with an SK C/35 naval gun and 220 rounds, an anti-aircraft gun, five torpedo tubes (four on the bow and one on the stern) and fourteen torpedoes. Its complement was between forty-four and sixty.
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