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German submarine U-631
Career (Nazi Germany)
Name: U-631
Ordered: 15 August 1940
Builder: Blohm & Voss, Hamburg
Yard number: 607
Laid down: 5 September 1941
Launched: 27 May 1942
Commissioned: 16 July 1942
Fate: Sunk 17 October 1943 in the North Atlantic in position 58°13′N 32°29′W / 58.217°N 32.483°W / 58.217; -32.483, by depth charges from HMS Sunflower.
General characteristics [1]
Class & type: Type VIIC submarine
Displacement: 769 tonnes (757 long tons) surfaced
871 t (857 long tons) submerged
Length: 67.1 m (220 ft 2 in) o/a
50.5 m (165 ft 8 in) pressure hull
Beam: 6.2 m (20 ft 4 in) o/a
4.7 m (15 ft 5 in) pressure hull
Draft: 4.74 m (15 ft 7 in)
Propulsion: 2 × supercharged Germaniawerft 6-cylinder 4-stroke F46 diesel engines, totalling 2,800–3,200 bhp (2,100–2,400 kW). Max rpm: 470-490
2 × BBC GG UB 720/8 electric motors, totalling 750 shp (560 kW) and max rpm: 296
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 kn (19 km/h; 12 mph) surfaced
80 nmi (150 km; 92 mi) at 4 kn (7.4 km/h; 4.6 mph) submerged
Test depth: 230 m (750 ft)
Crush depth: 250–295 m (820–968 ft)
Complement: 44–52 officers & ratings
Armament:
Service record[2]
Part of: 5th U-boat Flotilla
(16 July 1942 - 31 December 1942) - Training
9th U-boat Flotilla
(1 January 1943 - 17 October 1943)
Commanders: Oblt.z.S. Jürgen Krüger
(16 July 1942 - 17 October 1943)
Operations: 1st patrol:
19 December 1942 - 4 February 1943
2nd patrol:
6 March - 11 May 1943
3rd patrol:
18 September - 17 October 1943
Victories: 2 merchant ships sunk (9,136 GRT)

German submarine U-631 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 5 September 1941 by Blohm & Voss, Hamburg as yard number 607, launched on 27 May 1942 and commissioned on 16 July 1942 under Oberleutnant zur See Jürgen Krüger.

Service History[]

The boat's career began with training at 5th U-boat Flotilla on 16 July 1942, followed by active service on 1 January 1943 as part of the 9th Flotilla for the remainder of her service.

In three patrols she sank two merchant ships, for a total of 9,136 gross register tons (GRT).

Wolfpacks[]

U-631 took part in seven wolfpacks, namely

  • Falke (28 December 1942 – 19 January 1943)
  • Landsknecht (19–28 January 1943)
  • Stürmer (11–20 March 1943)
  • Seewolf 2 (21–30 March 1943)
  • Meise (11–27 April 1943)
  • Rossbach (27 September – 9 October 1943)
  • Schlieffen (14–17 October 1943)

Fate[]

U-631 was sunk on 17 October 1943 in the North Atlantic SE of Cape Farewell, Greenland, in position 58°13′N 32°29′W / 58.217°N 32.483°W / 58.217; -32.483, by depth charges from British corvette HMS Sunflower. All hands were lost.

Summary of Raiding Career[]

Date Name Nationality Tonnage
(GRT)
Fate[3]
29 December 1942 Ingerfem  Norway 3,978 Sunk
17 March 1943 Terkoelei  Netherlands 5,158 Sunk

References[]

  1. Gröner 1985, pp. 72-74.
  2. Helgason, Guðmundur. "The Type VIIC boat U-631". http://www.uboat.net/boats/u631.html. Retrieved 23 August 2014. 
  3. Helgason, Guðmundur. "Ships hit by U-631". http://uboat.net/boats/successes/u631.html. Retrieved 23 August 2014. 

Bibliography[]

  • Busch, Rainer; Röll, Hans-Joachim (1999) (in German). Deutsche U-Boot-Verluste von September 1939 bis Mai 1945. IV. Hamburg, Berlin, Bonn: Mittler. ISBN 3-8132-0514-2. 
  • Gröner, Erich (1985) (in German). U-Boote, Hilfskreuzer, Minenschiffe, Netzleger, Sperrbrecher. III. Koblenz: Bernard & Graefe. ISBN 3-7637-4802-4. 
  • Sharpe, Peter (1998). U-Boat Fact File. Great Britain: Midland Publishing. ISBN 1-85780-072-9. 

External links[]


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