German submarine U-751

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History
Nazi Germany
Name: U-751
Ordered: 9 October 1939[1]
Builder: Kriegsmarinewerft Wilhelmshaven
Yard number: 134
Laid down: 2 January 1940[1]
Launched: 16 November 1940[1]
Commissioned: 31 January 1941[1]
Fate: sunk[1]
General characteristics
Class and type: Type VIIC submarine
Displacement:
  • 769 tonnes (757 long tons) surfaced
  • 871 t (857 long tons) submerged
Length:
Beam:
  • 6.20 m (20 ft 4 in) o/a
  • 4.70 m (15 ft 5 in) pressure hull
Height: 9.60 m (31 ft 6 in)
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:
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:
Service record
Commanders
Operations 7 patrols[1]
Victories
  • 5 ships sunk for a total of 21,412 GRT[1]
  • 1 ship damaged 8,096 GRT
  • 1 auxiliary warship sunk 11,000 tons

German submarine U-751 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. Built as yard number 134 of the Kriegsmarinewerft shipyard in Wilhelmshaven, she was commissioned on 31 January 1941. She served with 7th U-boat Flotilla until 1 June as a training boat, and as an operational boat until 17 July 1942, under the command of Korvettenkapitän Gerhard Bigalk. U-751 served in seven patrols with the 7th U-boat Flotilla, sinking the escort carrier HMS Audacity. The U-boat was attacked with depth charges from aircraft on 17 July 1942 and sank with the loss of all 48 crew members.

Design[edit]

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-751 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 Brown, Boveri & Cie GG UB 720/8 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-751 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 a 2 cm (0.79 in) C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty.[2]

Service history[edit]

The U-boat disabled, unable to dive and circling, apparently out of control following an attack on 17 July 1942. It was later attacked and sunk by a Lancaster of No 61 Squadron, seconded to Coastal Command.

On 14 June 1941, eleven days into her thirty-three-day first patrol while en route from Kiel to St. Nazaire, U-751 attacked and sank the British ship St Lindsay (5,370 gross register tons (GRT)).

Arriving at St. Nazaire on 5 July, U-751 stayed in port for thirty-four days before going on her second patrol. She attacked no ships on her second and third voyages.

Five days into her fourth patrol, on 21 December 1941, U-751 attacked and sank HMS Audacity, an Escort carrier attached with British convoy HG 76.[3]

On 14 January 1942, U-751 left St. Nazaire on her fifth patrol, destined to return on 23 February. Nineteen days into this patrol, on February 2, U-751 attacked and damaged the Dutch ship Corilla, part of convoy HX 173 (8,096 GRT). Two days later, she sank the British ship Silveray, adding another 4,535 GRT to her score. Another British ship, Empire Sun, was sunk another three days later, for 6,952 GRT. The American ships Nicarao and Isabela were sunk in her sixth patrol, on 16 and 19 May 1942, totalling 1,455 and 3,110 GRTs respectively.

Wolfpacks[edit]

U-751 took part in six wolfpacks, namely

  • West (16–20 June 1941)
  • Hammer (5–12 August 1941)
  • Grönland (12–27 August 1941)
  • Bosemüller (28 August – 2 September 1941)
  • Seewolf (2–5 September 1941)
  • Reissewolf (21–31 October 1941)

Fate[edit]

After serving six operational patrols, U-751 was attacked on her seventh patrol four days into her voyage on July 17, 1942. She was sunk, with all hands lost, off the coast of Cape Ortegal, Spain by depth charges from a Lancaster bomber (of No. 61 Squadron RAF) and a Whitley bomber (of No. 502 Squadron RAF).

Summary of raiding history[edit]

Date Ship Name Nationality Tonnage[Note 1] Fate[4]
14 June 1941 St. Lindsay  United Kingdom 5,370 Sunk
21 December 1941 HMS Audacity  Royal Navy 11,000 Sunk
2 February 1942 Corilla  Netherlands 8,096 Damaged
4 February 1942 Silveray  United Kingdom 4,535 Sunk
7 February 1942 Empire Sun  United Kingdom 6,952 Sunk
16 May 1942 Nicarao  United States 1,445 Sunk
19 May 1942 Isabela  United States 3,110 Sunk

Table[edit]

References[edit]

Notes[edit]

  1. ^ Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.

Citations[edit]

  1. ^ a b c d e f g Helgason, Guðmundur. "The Type VIIC boat U-751". German U-boats of WWII - uboat.net. Retrieved 2009-10-13. 
  2. ^ a b c d Gröner 1991, pp. 43-46.
  3. ^ Helgason, Guðmundur. "Patrol of German U-boat U-751 from 16 Dec 1941 to 26 Dec 1941". German U-boats of WWII - uboat.net. Retrieved 29 December 2014. 
  4. ^ Helgason, Guðmundur. "Ships hit by U-751". German U-boats of WWII - uboat.net. Retrieved 10 February 2014. 

Bibliography[edit]

  • Busch, Rainer; Röll, Hans-Joachim (1999). German U-boat commanders of World War II : a biographical dictionary. Translated by Brooks, Geoffrey. London, Annapolis, Md: Greenhill Books, Naval Institute Press. ISBN 1-55750-186-6. 
  • Busch, Rainer; Röll, Hans-Joachim (1999). Deutsche U-Boot-Verluste von September 1939 bis Mai 1945 [German U-boat losses from September 1939 to May 1945]. Der U-Boot-Krieg (in German). IV. Hamburg, Berlin, Bonn: Mittler. ISBN 3-8132-0514-2. 
  • Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4. 

External links[edit]