Name U-620 Yard number 596 Commissioned 30 April 1942 Launched 9 March 1942 Draft 4.74 m Builder Blohm + Voss | Ordered 15 August 1940 Laid down 19 June 1941 Construction started 19 June 1941 Length 67 m Beam 6.2 m | |
Fate Sunk 13 February 1943 in the North Atlantic in position , by depth charges from a RAF Catalina. Part of 8th U-boat Flotilla, 3rd U-boat Flotilla | ||
German submarine U-620 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 19 June 1941 by Blohm & Voss, Hamburg as yard number 596, launched on 9 March 1942 and commissioned on 30 April 1942 under Oberleutnant zur See Heinz Stein.
Contents
Design
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-620 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged. She had a total length of 67.10 m (220 ft 2 in), a pressure hull length of 50.50 m (165 ft 8 in), a beam of 6.20 m (20 ft 4 in), a height of 9.60 m (31 ft 6 in), and a draught of 4.74 m (15 ft 7 in). The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2,800 to 3,200 metric horsepower (2,060 to 2,350 kW; 2,760 to 3,160 shp) for use while surfaced, two Brown, Boveri & Cie GG UB 720/8 double-acting electric motors producing a total of 750 metric horsepower (550 kW; 740 shp) for use while submerged. She had two shafts and two 1.23 m (4 ft) propellers. The boat was capable of operating at depths of up to 230 metres (750 ft).
The submarine had a maximum surface speed of 17.7 knots (32.8 km/h; 20.4 mph) and a maximum submerged speed of 7.6 knots (14.1 km/h; 8.7 mph). When submerged, the boat could operate for 80 nautical miles (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 8,500 nautical miles (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph). U-620 was fitted with five 53.3 cm (21 in) torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.8 cm (3.46 in) SK C/35 naval gun, 220 rounds, and an 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 30 April 1942, followed by active service on 1 October 1942 as part of the 3rd Flotilla for the remainder of her service.
In 2 patrols she sank 1 merchant ships, for a total of 6,983 gross register tons (GRT).
Wolfpacks
U-620 took part in five wolfpacks, namely
Fate
U-620 was sunk on 13 February 1943 in the North Atlantic in position 39°18′N 11°17′W, by depth charges from a Royal Air Force (RAF) Consolidated Catalina of No. 207 Squadron RAF, for the loss of all hands.