German submarine U-377 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 8 April 1940 at the Howaldtswerke yard in Kiel, launched on 15 August 1941, and commissioned on 2 October 1941 under the command of Kapitänleutnant Otto Köhler. U-377 was attached to the 6th U-boat Flotilla, and was ready for front-line service from 1 February 1942. She served with the 11th U-boat Flotilla based in Norway from 1 July 1942, and was transferred to the 9th U-boat Flotilla based in France on 1 March 1943. She sailed on 11 war patrols between February 1942 and January 1944, but sank no ships, before she was sunk with the loss of all hands on 17 January 1944 on the position by depth charges from the British destroyer and the frigate . Design German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-377 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-377 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, and a C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty. Service history Norway U-377 sailed from Kiel on 14 February 1942 and patrolled along the coast of Norway before arriving at Narvik on 28 February. This was her home port for the rest of the year, she sailed on a series of six patrols in the Barents Sea, without success. On 30 January 1943 U-377 left Bergen and sailed out into the Atlantic, patrolling south of Greenland, before arriving at Brest in France on 18 March, having been transferred