History
Nazi Germany
NameU-400
Ordered25 August 1941
BuilderHowaldtswerke, Kiel
Yard number32
Laid down18 November 1942
Launched8 January 1944
Commissioned18 March 1944
FateSunk on 15 December 1944
General characteristics
Class and typeType 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
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][2]
Part of:
Identification codes: M 49 932
Commanders:
  • Kptlt. Horst Creutz
  • 18 March – 15 December 1944
Operations:
  • 1 patrol:
  • a. 15 – 16 November 1944
  • b. 18 November – 15 December 1944
Victories: None

German submarine U-400 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II.

The submarine was laid down on 18 November 1942 at the Howaldtswerke yard in Kiel as yard number 32, launched on 8 January 1944 and commissioned on 18 March under the command of Kapitänleutnant Horst Creutz.[1]

Design

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-400 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged.[3] 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 Garbe, Lahmeyer & Co. RP 137/c 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).[3]

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).[3] 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-400 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), one 3.7 cm (1.5 in) Flak M42 and two twin 2 cm (0.79 in) C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.[3]

Service history

After training with the 5th U-boat Flotilla, U-400 was attached to the 11th U-boat Flotilla for front-line service on 1 November 1944.[1]

The U-boat sailed from Horten Naval Base in Norway for her first war patrol on 15 November 1944, and headed for the waters off Land's End.[2] Despite repeated requests for reports by the German U-boat Command, none were received. The U-boat was eventually listed as "missing" at the end of January 1945. After the war, the Allies attributed the loss of U-400 to a depth charge attack by the frigate HMS Nyasaland on 17 December 1944, about 30 nautical miles (56 km) SE of Kinsale, Ireland.[4]

Discovery

The wreck of U-400 was finally identified by nautical archaeologist Innes McCartney and historian Axel Niestle in 2006, about 10 miles (16 km) north-west of Padstow, Cornwall, at position 50°39.9′N 5°5′W / 50.6650°N 5.083°W / 50.6650; -5.083[1] close to the wrecks of two other U-boats, U-325 and U-1021. All three submarines were sunk in the Bristol Channel by a deep-trap minefield.[1]

The U-boat sunk by Nyasaland is now believed to have been U-772.[5]

Previously recorded fate

U-400 was noted as sunk in mid-December 1944 in the British minefield 'HX A1' off the Cornish coast.

References

  1. 1 2 3 4 5 Helgason, Guðmundur. "The Type VIIC boat U-400". German U-boats of WWII - uboat.net. Retrieved 10 September 2012.
  2. 1 2 Helgason, Guðmundur. "War Patrols by German U-boat U-400". German U-boats of WWII - uboat.net. Retrieved 10 September 2012.
  3. 1 2 3 4 Gröner 1991, pp. 43–46.
  4. ↑ Helgason, Guðmundur. "The loss of U-325, U-400 and U-1021". German U-boats of WWII - uboat.net. Retrieved 13 January 2010.
  5. ↑ "War Mystery Solved". cix.co.uk. Retrieved 13 January 2010.

Bibliography

  • 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). Vol. 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. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
  • Helgason, Guðmundur. "The Type VIIC boat U-400". German U-boats of WWII - uboat.net. Retrieved 26 December 2014.
  • Hofmann, Markus. "U 400". Deutsche U-Boote 1935-1945 - u-boot-archiv.de (in German). Retrieved 26 December 2014.
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