German submarine U-400
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. Design. German Type VIIC submarines were preceded by the shorter Type VIIB submarines. "U-400" had a displacement of when at the surface and while submerged. She had a total length of , a pressure hull length of , a beam of , a height of , and  a draught of . The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of for use while surfaced, two Garbe, Lahmeyer & Co. RP 137/c double-acting electric motors producing a total of for use while submerged. She had two shafts and two propellers. The boat was capable of operating at depths of up to . The submarine had a maximum surface speed of and a maximum submerged speed of . When submerged, the boat could operate for at ; when surfaced, she could travel at . "U-400" was fitted with five torpedo tubes (four fitted  at the bow and one at the stern), fourteen torpedoes, one SK C/35 naval gun, (220 rounds), one Flak M42 and two twin C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty. 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. 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. 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 on 17 December 1944, about SE of Kinsale, Ireland. Discovery. The wreck of "U-400" was finally identified by nautical archaeologist Innes McCartney and historian Axel Niestle in 2006, about north-west of Padstow, Cornwall, at position close to the wrecks of two other U-boats, and . All three submarines were sunk in the Bristol Channel by a deep-trap minefield. The  U-boat sunk by "Nyasaland" is now believed to have been . Previously recorded fate. "U-400" was noted as sunk in mid-December 1944 in the British minefield 'HX A1' off the Cornish coast.