German submarine U-634
German submarine "U-634" was a Type VIIC U-boat built for Nazi Germany's "Kriegsmarine" for service during World War II. She was laid down on 23 September 1941 by Blohm & Voss, Hamburg as yard number 610, launched on 10 June 1942 and commissioned on 6 August 1942 under "Oberleutnant zur See" Hans-Günther Brosin. Design. German Type VIIC submarines were preceded by the shorter Type VIIB submarines. "U-634" 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 BBC GG UB 720/8 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-634" 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 one twin C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty. Service history. The boat's career began with training at 5th U-boat Flotilla on 6 August 1942, followed by active service on 1 February 1943 as part of the 9th Flotilla for the remainder of her service. In three patrols she sank one merchant ship, for a total of . Fate. "U-634" was sunk on 30 August 1943 in the North Atlantic in position , by depth  charges from and . All crew members died. Wolfpacks. "U-634" took part in five wolfpacks, namely: