|Ordered:||9 October 1939|
|Laid down:||2 January 1940|
|Launched:||16 November 1940|
|Commissioned:||31 January 1941|
|Class and type:||Type VIIC submarine|
|Height:||9.60 m (31 ft 6 in)|
|Draught:||4.74 m (15 ft 7 in)|
|Complement:||4 officers, 40–56 enlisted|
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.
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. 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).
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). 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.
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.
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.
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)
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
|Date||Ship Name||Nationality||Tonnage[Note 1]||Fate|
|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|
- Helgason, Guðmundur. "The Type VIIC boat U-751". German U-boats of WWII - uboat.net. Retrieved 13 October 2009.
- Gröner 1991, pp. 43-46.
- 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.
- Helgason, Guðmundur. "Ships hit by U-751". German U-boats of WWII - uboat.net. Retrieved 10 February 2014.
- 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.
- Helgason, Guðmundur. "The Type VIIC boat U-751". German U-boats of WWII - uboat.net. Retrieved 29 December 2014.