German submarine U-712

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Career (Nazi Germany)
Name: U-712
Ordered: 7 December 1940[1]
Builder: HC Stülcken & Sohn, Hamburg
Laid down: 4 September 1941[1]
Launched: 10 August 1942[1]
Commissioned: 5 November 1942[1]
Status: Surrendered to Allied forces[1]
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: 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: 44–52 officers & ratings
Armament:
Service record
Part of:

Kriegsmarine
8th U-boat Flotilla (training)
5 Nov 1942 - 31 Oct 1943
3rd U-boat Flotilla (Front Boat, 0 patrols)
1 Nov - 31 Dec 1943
21st U-boat Flotilla (training)
1 Jan 1944 - 28 Feb 1945

31st U-boat Flotilla (training)
1 Mar - 8 May 1945
Commanders:

Oblt.z.S. Walter Pietschmann
5 Nov - 14 Dec 1943
Oblt.z.S. Walter-Ernst Koch
15 Dec 1943 - 2 Jul 1944

Oblt.z.S. Freiherr Eberhard von Ketelhodt
3 Jul 1944- 8 May 1945
Operations: 0 patrols[1]

German submarine U-712 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. Commissioned on 5 November 1942, she served with the 8th U-boat Flotilla until 31 October 1943 as a training boat, and as a front boat in the 3rd U-boat Flotilla under Oberleutnant zur See Walter Pietschmann until 14 December, before being replaced by Oberleutnant Walter-Ernst Koch.

Service Record[edit]

Built in werk 778 of the HC Stülcken & Sohn shipyard in Hamburg, U-712 was launched on 10 August 1942. After the completion of system checks and crew training, U-712 was transferred to the 3rd Flotilla on 13 October 1943. On 1 January 1944, she was re-assigned to the 21st U-boat Flotilla as a training boat. On the 3 July 1944, Oberleutnant zur See Koch handed over to Freiherr Eberhard von Ketelhodt, leaving to command U-975.[2] U-712 '​s purpose was succeeded by a similar function with the 31st from 1 March 1945

In the rest of her career under Walter-Ernst Koch and Freiherr Eberhard von Ketelhodt, she served as a training vessel, never having made a single patrol.

Fate[edit]

After Germany's surrender in May, 1945, U-712 was scuttled at Kristiansand in Norway. She was later taken to Loch Ryan in Scotland, where the British used her bulk for testing before braking her up at Hayle in 1950

References[edit]

Notes
  1. ^ a b c d e f "U-712". Uboat Encyclopedia. Uboat.net. Retrieved 2010-03-01. 
  2. ^ "Oblt.z.S. Koch". Uboat.net. Retrieved 2010-03-27. 
Bibliography
  • 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. 
  • Gröner, Erich (1985). U-Boote, Hilfskreuzer, Minenschiffe, Netzleger, Sperrbrecher. Die deutschen Kriegsschiffe 1815-1945 (in German) III (Koblenz: Bernard & Graefe). ISBN 3-7637-4802-4.