German submarine U-90 (1941)

History
Nazi Germany
Name:	U-90
Ordered:	25 January 1939
Builder:	Flender Werke, Lübeck
Yard number:	294
Laid down:	1 October 1940
Launched:	25 October 1941
Commissioned:	20 December 1941
Fate:	Sunk 24 July 1942 in the Northern Atlantic by a Canadian warship
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
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) various AA guns
Service record
Part of:	Kriegsmarine: 8th U-boat Flotilla 20 December 1941 – 30 June 1942 9th U-boat Flotilla 1–24 July 1942
Commanders:	Kptlt. Hans-Jürgen Oldörp 20 December 1941 – 24 July 1942
Operations:	30 June – 24 July 1942
Victories:	None

German submarine U-90 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 294 on 1 October 1940, launched on 25 October 1941 and commissioned on 20 December with Oberleutnant zur See Hans-Jürgen Oldörp in command.

After training with the 8th U-boat Flotilla, U-90 was assigned to the 9th flotilla on 1 July 1942 for operations. She was a member of one wolfpack in a patrol in which she was sunk by a Canadian warship.

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-90 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 MAN M 6 V 40/46 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).

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