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German submarine U-737

Coordinates: 68°09′N 15°39′E / 68.150°N 15.650°E / 68.150; 15.650
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History
Nazi Germany
NameU-737
Ordered10 April 1941
BuilderSchichau-Werke, Danzig
Yard number1534
Laid down14 February 1942
Launched21 November 1942
Commissioned30 January 1943
FateSunk on 19 December 1944
General characteristics
Class and typeType VIIC submarine
Displacement
Length
Beam
  • 6.20 m (20 ft 4 in) o/a
  • 4.70 m (15 ft 5 in) pressure hull
Height9.60 m (31 ft 6 in)
Draught4.74 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
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)
Complement4 officers, 40–56 enlisted
Armament
Service record[1]
Part of:
Identification codes: M 49 907
Commanders:
  • Oblt.z.S. Wolfgang Poeschel
  • 30 January – 4 February 1943
  • Kptlt. Paul Brasack
  • 5 February 1943 – 24 November 1944
  • Oblt.z.S. Friedrich-August Greus
  • 25 November – 19 December 1944
Operations:
  • 9 patrols:
  • 1st patrol:
  • 8 August – 20 September 1943
  • 2nd patrol:
  • a. 4 – 23 October 1943
  • b. 24 October 1943
  • c. 27 – 29 October 1943
  • d. 13 – 15 January 1944
  • 3rd patrol:
  • a. 16 January – 10 February 1944
  • b. 11 – 12 February 1944
  • c. 28 – 29 February 1944
  • 4th patrol:
  • a. 1 – 8 March 1944
  • b. 9 – 12 March 1944
  • c. 2 – 4 May 1944
  • d. 8 May 1944
  • 5th patrol:
  • a. 13 May – 7 June 1944
  • b. 11 – 12 June 1944
  • c. 14 – 18 June 1944
  • 6th patrol:
  • a. 24 June – 9 July 1944
  • b. 15 – 17 July 1944
  • c. 16 – 21 September 1944
  • d. 22 September 1944
  • 7th patrol:
  • 24 September – 3 October 1944
  • 8th patrol:
  • a. 12 – 24 October 1944
  • b. 25 – 31 October 1944
  • 9th patrol:
  • 13 – 19 December 1944
Victories: None

German submarine U-737 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine built for service during World War II. Her keel was laid down on 14 February 1942 by Schichau-Werke of Danzig. She was commissioned on 30 January 1943 with Oberleutnant zur See Wolfgang Poeschel in command.

Design

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German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-737 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged.[2] 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 AEG GU 460/8–27 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).[2]

The submarine had a maximum surface speed of 17.7 knots (32.8 km/h; 20.4 mph) and a maximum submerged speed of 7.6 knots (14.1 km/h; 8.7 mph).[2] When submerged, the boat could operate for 80 nautical miles (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 8,500 nautical miles (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph). U-737 was fitted with five 53.3 cm (21 in) torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.8 cm (3.46 in) SK C/35 naval gun, 220 rounds, and two twin 2 cm (0.79 in) C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.[2]

Service history

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The boat was attacked twice by aircraft while on active service. Once early in 1944, by a RAF British Liberator aircraft. She managed to damage the plane with anti-aircraft fire, which had to abort the attack and was forced to make a belly landing because of damage sustained. In later 1944, the U-boat was attacked by a Soviet plane, three crew were injured, before she dived.

Wolfpacks

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U-737 took part in eight wolfpacks, namely:

  • Monsun (4 – 22 October 1943)
  • Isegrim (16 – 27 January 1944)
  • Werwolf (27 January – 9 February 1944)
  • Taifun (5 – 7 March 1944)
  • Trutz (2 – 6 June 1944)
  • Feuer (17 – 19 September 1944)
  • Grimm (24 September – 2 October 1944)
  • Panther (16 – 23 October 1944)

Fate

[edit]

While on active duty under the command of Oberleutnant zur See Friedrich-August Greus, U-737 sank at 00:18 on 19 December 1944 in the Vestfjorden, in position 68°09′N 15°39′E / 68.150°N 15.650°E / 68.150; 15.650. She had collided with German depot ship, MRS 25. 31 crew died, with 20 survivors.

References

[edit]
  1. ^ Helgason, Guðmundur. "The Type VIIC boat U-737". German U-boats of WWII - uboat.net. Retrieved 15 October 2014.
  2. ^ a b c d Gröner 1991, pp. 43–46.

Bibliography

[edit]
[edit]
  • Helgason, Guðmundur. "The Type VIIC boat U-737". German U-boats of WWII - uboat.net. Retrieved 29 December 2014.
  • Helgason, Guðmundur. "Gunther Pfeffer". German U-boats of WWII - uboat.net. Retrieved 29 December 2014.