German submarine U-622

German submarine U-622 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 1 July 1941 by Blohm & Voss, Hamburg, as yard number 598, launched on 19 March 1942 and commissioned on 14 May 1942 under Oberleutnant zur See Horst-Thilo Queck.

Design
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-622 had a displacement of 769 t when at the surface and 871 t while submerged. She had a total length of 67.10 m, a pressure hull length of 50.50 m, a beam of 6.20 m, a height of 9.60 m, and a draught of 4.74 m. The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2800 to 3200 PS for use while surfaced, two Brown, Boveri & Cie GG UB 720/8 double-acting electric motors producing a total of 750 PS for use while submerged. She had two shafts and two 1.23 m propellers. The boat was capable of operating at depths of up to 230 m.

The submarine had a maximum surface speed of 17.7 kn and a maximum submerged speed of 7.6 kn. When submerged, the boat could operate for 80 nmi at 4 kn; when surfaced, she could travel 8500 nmi at 10 kn. U-622 was fitted with five 53.3 cm torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.8 cm SK C/35 naval gun, 220 rounds, and a 2 cm 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 8th U-boat Flotilla on 14 May 1942, followed by active service on 2 October 1942 as part of the 11th Flotilla until 31 May 1943, when she then transferred to 13th Flotilla on 1 June 1943 for the remainder of her service.

In four patrols she sank no ships.

Wolfpacks
U-622 took part in one wolfpack, namely:
 * Nordwind (24 – 28 January 1943)

Fate
U-622 was sunk on 24 July 1943 near Trondheim in position 63.45°N, 10.38333°W, by American B-17 bombers of the 95th Bomb Group. It was one of the only U-boats sunk by high-level bombing during World War II.