German submarine U-771

History
Nazi Germany
Name	U-771
Ordered	21 November 1940
Builder	Kriegsmarinewerft Wilhelmshaven
Yard number	154
Laid down	21 August 1942
Launched	26 September 1943
Commissioned	18 November 1943
Fate	Sunk in the Arctic Ocean by torpedoes from the British submarine HMS Venturer on 11 November 1944. All hands lost.[1]
General characteristics
Class and type	Type VIIC submarine
Displacement	769 tonnes (757 long tons) surfaced 871 t (857 long tons) submerged
Length	67.10 m (220 ft 2 in) o/a 50.50 m (165 ft 8 in) pressure hull
Beam	6.20 m (20 ft 4 in) o/a 4.70 m (15 ft 5 in) pressure hull
Height	9.60 m (31 ft 6 in)
Draught	4.74 m (15 ft 7 in)
Installed power	2,800–3,200 PS (2,100–2,400 kW; 2,800–3,200 bhp) (diesels) 750 PS (550 kW; 740 shp) (electric)
Propulsion	2 shafts 2 × diesel engines 2 × electric motors
Speed	17.7 knots (32.8 km/h; 20.4 mph) surfaced 7.6 knots (14.1 km/h; 8.7 mph) submerged
Range	8,500 nmi (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph) surfaced 80 nmi (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth	230 m (750 ft) Crush depth: 250–295 m (820–968 ft)
Complement	4 officers, 40–56 enlisted
Armament	5 × 53.3 cm (21 in) torpedo tubes (four bow, one stern) 14 × torpedoes 1 × 8.8 cm (3.46 in) deck gun (220 rounds) 1 × 3.7 cm (1.5 in) Flak M42 AA gun 2 × twin 2 cm (0.79 in) C/30 anti-aircraft guns
Service record
Part of:	31st U-boat Flotilla 18 November 1943 – 31 May 1944 9th U-boat Flotilla 1 June – 31 July 1944 11th U-boat Flotilla 1 August – 30 September 1944 13th U-boat Flotilla 1 October – 11 November 1944
Identification codes:	M 54 806
Commanders:	Oblt.z.S. Helmut Block 18 November 1943 – 11 November 1944
Operations:	2 patrols: 1st patrol: a. 21 June – 15 July 1944 b. 26 – 28 July 1944 c. 29 July – 1 August 1944 d. 2 – 3 August 1944 e. 5 – 6 August 1944 f. 27 – 30 September 1944 g. 2 – 4 October 1944 2nd patrol: 14 October – 11 November 1944
Victories:	1 Allied aircraft shot down

German submarine U-771 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. She was ordered on 21 November 1940, and was laid down on 21 August 1942 at Kriegsmarinewerft, Wilhelmshaven, as yard number 154. She was launched on 26 September 1943 and commissioned under the command of Oberleutnant zur See Helmut Block on 18 November of that year.^[1]