German submarine U-628

German submarine U-628 was a [German German Type VIIC submarine|Type VIIC submarine|Type VIIC] U-boat built for Nazi Germany's Kriegsmarine for service during World War II.
She was laid down on 7 August 1941 by Blohm & Voss, Hamburg as yard number 604, launched on 29 April 1942 and commissioned on 25 June 1942 under Kapitänleutnant Heinrich Hasenschar.

Design

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-628 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 Brown, Boveri & Cie 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-628 was fitted with five torpedo tubes, 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.

The boat's service began on 25 June 1942 with training as part of the 5th U-boat Flotilla. She was transferred to the 1st Flotilla on 1 December 1942 for active service in the North Atlantic.
In four patrols she sank four merchant ships, for a total of, plus three merchant ships damaged.

U-628 took part in six wolfpacks, namely:

U-628 was sunk on 3 July 1943 in the North Atlantic NW of Cape Ortegal in position ; bombed and depth charged by RAF Liberator aircraft of 224/J Squadron out of RAF St Eval in Cornwall. All 49 hands were lost.