German submarine U-312

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Name: U-312
Ordered: 5 June 1940
Builder: Flender Werke, Lübeck
Yard number: 312
Laid down: 10 April 1942
Launched: 27 February 1943
Commissioned: 21 April 1943
Fate: Surrendered, May 1945, sunk as part of Operation Deadlight, November 1945
General characteristics
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 × GL RP 137/c 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: 15,170 km (8,190 nmi) at 10 knots (19 km/h; 12 mph) surfaced
150 km (81 nmi) 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: 44–52 officers and ratings
Armament: 5 × 53.3 cm (21 in) torpedo tubes (four bow, one stern)
14 × G7e torpedoes or 26 TMA mines
1 × 8.8 cm (3.46 in) deck gun (220 rounds)
Various AA guns
Service record[1][2]
Part of: 8th U-boat Flotilla
(21 April–30 November 1943)
6th U-boat Flotilla
(1 December 1943–31 December 1943)
11th U-boat Flotilla
(1 April–31 August 1944)
13th U-boat Flotilla
(1 September 1944–8 May 1945)
Commanders: Kptlt. Kurt-Heinz Nicolay
(21 April 1943–1 December 1944)
Oblt.z.S. Friedrich-Georg Herrle
(2 December 1944–31 January 1945)
Operations: 1st patrol:
a. 23 January–4 February 1944
b. 7–29 February 1944
2nd patrol:
15 March–12 April 1944
3rd patrol:
29 April–13 May 1944
4th patrol:
7 September–2 October 1944
5th patrol:
17 October&ndasdh;8 November 1944
6th patrol
14 December 1944–4 January 1945
7th patrol:
12 March–9 April 1945
8th patrol:
16 April–8 May 1945
Victories: None

German submarine U-312 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 10 April 1942 at the Flender Werke yard at Lübeck as 'werk' 312, launched on 27 February 1943 and commissioned on 21 April under the command of Oberleutnant zur See Kurt-Heinz Nicolay.

During her career, the U-boat sailed on eight combat patrols, but sank no ships. She surrendered in May 1945 and was sunk as part of Operation Deadlight, in November 1945.[1]

She was a member of eight wolfpacks.

Service history[edit]

After training with the 8th U-boat Flotilla, U-312 was transferred to the 6th flotilla, for front-line service on 1 December 1943.[1] She made the short voyage from Kiel in Germany to Bergen in Norway in the first half of January 1944.

1st, 2nd and 3rd patrols[edit]

She left Bergen on 23 January 1944 and travelled through the north Norwegian Sea and southwest of Bear Island, arriving in Hammerfest on 29 February.

Her second patrol was similar to the first, sailing through the Norwegian, Greenland and Barents Seas. She docked at Narvik on 12 April 1944.

The boat sortied for a third time from Narvik on 29 April 1944. She arrived back at that port on 13 May and moved to Trondheim.

4th and 5th patrols[edit]

Her fourth foray was relatively uneventful, starting and finishing in Narvik.

The submarine's fifth patrol was only notable for clearing the North Cape and passing east of Murmansk.

6th, 7th and 8th patrols[edit]

Patrol number six was slightly different in that it took her as far as the northern Scottish coast, arriving there on 24 December 1944.

The boat was now based at Kilbotn, from whence she sailed on her seventh and eighth patrols.

Surrender and fate[edit]

Following the German capitulation, U-312 was moved, first from Kilbotn to Narvik, then to Skjomenfjord before arriving at Loch Eriboll in Scotland on 19 May 1945 in preparation for Operation Deadlight. She was finally transferred to Lisahally and sunk on 29 November by the guns of HMS Onslow.[3]


  1. ^ a b c Helgason, Guðmundur. "The Type VIIC boat U-312". Retrieved 17 August 2012. 
  2. ^ Helgason, Guðmundur. "War Patrols by German U-boat U-312". Retrieved 17 August 2012. 
  3. ^ U-312 at
  • Busch, Rainer; Röll, Hans-Joachim (1999). "Deutsche U-Boot-Verluste von September 1939 bis Mai 1945". Der U-Boot-Krieg (in German) IV (Hamburg, Berlin, Bonn: Mittler). ISBN 3-8132-0514-2. 

External links[edit]

See also[edit]

Coordinates: 55°35′N 7°54′W / 55.583°N 7.900°W / 55.583; -7.900