German submarine U-564
German submarine U-564 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during the Second World War. The RAF sank her in the Bay of Biscay on 14 June 1943. Construction and commissioning She was ordered on 24 October 1939 and was laid down on 30 March 1940 at Blohm & Voss, Hamburg, as ' 540'. She was launched on 7 February 1941 and commissioned under her first commander Oberleutnant zur See Reinhard Suhren on 3 April of that year. Her chief engineer under Suhren was Ulrich Gabler. Suhren commanded her for her work-up with the 1st U-boat Flotilla between 3 April and 1 June 1941. She then became a front (operational) boat of the 1st U-boat Flotilla, and set out on her first patrols. Design German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-564 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,