German submarine U-91 (1941)

History
Nazi Germany
Name	U-91
Ordered	25 January 1939
Builder	Flender Werke, Lübeck
Yard number	295
Laid down	12 November 1940
Launched	30 November 1941
Commissioned	28 January 1942
Fate	Sunk 26 February 1944 in the Northern Atlantic by HMS Affleck, HMS Gore and HMS Gould
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 x 2 cm (0.79 in) C/30 AA gun
Service record
Part of:	5th U-boat Flotilla 28 January – 31 August 1942 9th U-boat Flotilla 1 September 1942 – 26 February 1944
Identification codes:	M 08 626
Commanders:	Kptlt. Heinz Walkerling 28 January 1942 – 19 April 1943 Kptlt. Heinz Hungerhausen 20 April 1943 – 26 February 1944
Operations:	6 patrols: 1st patrol: 15 August – 6 October 1942 2nd patrol: 1 November – 26 December 1942 3rd patrol: 11 February – 29 March 1943 4th patrol: 29 April – 7 June 1943 5th patrol: 21 September – 22 November 1943 6th patrol: 25 January – 26 February 1944
Victories:	4 merchant ships sunk (26,194 GRT) 1 warship sunk (1,375 tons)

German submarine U-91 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II.

She was laid down at the Flender Werke in Lübeck as yard number 295, launched on 30 November 1941 and commissioned on 28 January 1942 with Oberleutnant zur See Heinz Walkerling as commanding officer. Command was transferred to Oblt.z.S. Heinz Hungershausen on 20 April 1943.

She was a fairly successful boat, sinking over 26,000 tons of Allied shipping in a career lasting just 14 months and six patrols. She was a member of fifteen wolfpacks. After training with the 5th U-boat Flotilla, U-91 was assigned to the 9th flotilla on 1 September 1942 for operations.