German submarine U-564

History
Nazi Germany
Name:	U-564
Ordered:	24 October 1939
Builder:	Blohm & Voss, Hamburg
Yard number:	540
Laid down:	30 March 1940
Launched:	7 February 1941
Commissioned:	3 April 1941
Fate:	Sunk on 14 June 1943
General characteristics
Class and type:	Type VIIC U-boat
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
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) surfaced 80 nmi (150 km; 92 mi) submerged
Test depth:	230 m (750 ft) Calculated crush depth: 250–295 m (820–968 ft)
Complement:	44 to 52 officers and ratings
Armament:	5 × 53.3 cm (21 in) torpedo tubes (four bow, one stern) 14 × torpedoes or 26 TMA mines 1 × 8.8 cm (3.46 in) deck gun (220 rounds) various AA guns
Service record
Part of:	1st U-boat Flotilla 3 April – 1 June 1941 (Training) 1st U-boat Flotilla 1–14 June 1943
Commanders:	K.Kapt. Reinhard Suhren 3 April – 1 October 1941 Oblt.z.S. Hans Fiedler 1–14 June 1943
Operations:	9 patrols
Victories:	18 merchant ships sunk (95,544 GRT) 1 warship sunk (900 tons) 4 merchant ships damaged (28,907 GRT)

German submarine U-564 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during the Second World War. The RAF sank her in the Bay of Biscay on 14 June 1943.

She was ordered on 24 October 1939 and was laid down on 30 March 1940 at Blohm & Voss, Hamburg, as ' 540'. She was launched on 7 February 1941 and commissioned under her first commander Oberleutnant zur See Reinhard Suhren on 3 April of that year. Her chief engineer under Suhren was Ulrich Gabler. Suhren commanded her for her work-up with the 1st U-boat Flotilla between 3 April and 1 June 1941. She then became a front (operational) boat of the 1st U-boat Flotilla, and set out on her first patrols.

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-564 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).

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