German submarine U-636

History
Nazi Germany
Name	U-636
Ordered	20 January 1941
Builder	Blohm & Voss, Hamburg
Yard number	612
Laid down	2 October 1941
Launched	25 June 1942
Commissioned	20 August 1942
Fate	Sunk on 21 April 1945 in the North Atlantic in position 55°50′N 10°31′W / 55.833°N 10.517°W / 55.833; -10.517, by depth charges from HMS Bazely, HMS Drury and HMS Bentinck.
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
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 or 26 TMA mines 1 × 8.8 cm (3.46 in) deck gun (220 rounds) 1 × twin 2 cm (0.79 in) C/30 anti-aircraft gun
Service record[1]
Part of:	5th U-boat Flotilla 20 August 1942 – 31 March 1943 11th U-boat Flotilla 1 April – 31 October 1943 13th U-boat Flotilla 1 November 1943 – 21 April 1945
Identification codes:	M 51 601
Commanders:	Kptlt. Hans Hildebrandt 20 August 1942 – 14 February 1944 Oblt.z.S. Eberhard Schendel 15 February 1944 – 21 April 1945
Operations:	15 patrols: 1st patrol: a. 2 May – 8 June 1943 b. 24 – 27 July 1943 c. 28 – 31 July 1943 2nd patrol: a. 31 July – 7 August 1943 b. 14 – 16 August 1943 3rd patrol: a. 17 – 30 August 1943 b. 5 – 9 September 1943 c. 24 – 25 October 1943 d. 27 – 31 October 1943 e. 2 – 3 November 1943 4th patrol: a. 6 – 17 November 1943 b. 18 – 19 November 1943 c. 21 – 22 November 1943 5th patrol: 23 November – 27 December 1943 6th patrol: 30 December 1943 – 8 January 1944 7th patrol: a. 26 January – 2 February 1944 b. 4 – 5 February 1944 c. 8 – 11 February 1944 d. 31 March – 2 April 1944 8th patrol: a. 8 April – 3 May 1944 b. 5 – 7 May 1944 c. 23 – 24 June 1944 9th patrol: a. 27 June – 23 July 1944 b. 24 July 1944 10th patrol: a. 25 August – 12 September 1944 b. 16 – 18 September 1944 11th patrol: 25 September – 3 October 1944 12th patrol: a. 6 October – 12 November 1944 b. 14 – 16 November 1944 13th patrol: 4 – 16 December 1944 14th patrol: a. 25 December 1944 – 30 January 1945 b. 1 – 3 February 1945 15th patrol: 1 – 21 April 1945
Victories:	1 merchant ship sunk (7,169 GRT)

German submarine U-636 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 2 October 1941 by Blohm & Voss, Hamburg as yard number 612, launched on 25 June 1942 and commissioned on 20 August 1942 under Oberleutnant zur See Hans Hildebrandt.