German submarine U-768
German submarine "U-768" was a Type VIIC U-boat of Nazi Germany's "Kriegsmarine" during World War II. Under the command of "Oberleutnant zur See" Johann Buttjer she was commissioned on 14 October 1943, and was sunk in a collision with on 20 November 1943. Design. German Type VIIC submarines were preceded by the shorter Type VIIB submarines. "U-768" had a displacement of when at the surface and while submerged. She 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  Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of for use while surfaced, two Garbe, Lahmeyer & Co. RP 137/c 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, the boat could operate for at ; when surfaced, she could travel at . "U-768" was fitted with five torpedo tubes (four fitted at the bow and one at the stern), fourteen  torpedoes, one SK C/35 naval gun, (220 rounds), one Flak M42 and two twin C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.