German submarine U-517  German submarine "U-517" was a Type IXC U-boat of the Nazi Germany's "Kriegsmarine" during World War II. She was laid down at the Deutsche Werft in Hamburg as yard number 313 on 24 September 1940, launched on 30 December 1941 and commissioned on 21 March 1942 with "Kapitänleutnant" Paul Hartwig in command. "U-517" began her service career with training as part of the 4th U-boat Flotilla from 21 March 1942. She was reassigned to the 10th flotilla for operations on 1 September. She carried out two patrols and sank eight ships. She was sunk by British carrier aircraft in November 1942. German Type IXC submarines were slightly larger than the original Type IXBs. "U-517" had a displacement of when at the surface and while submerged. The U-boat 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 MAN M 9 V 40/46 supercharged four-stroke, nine-cylinder diesel engines producing a total of for use while surfaced, two Siemens-Schuckert 2 GU 345/34 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-517" was fitted with six torpedo tubes (four fitted at the bow and two at the stern), 22 torpedoes, one SK C/32 naval gun, 180 rounds, and a SK C/30 as well as a C/30 anti-aircraft gun. The boat had a complement of forty-eight. The boat departed Kiel on 8 August 1942, moved through the North Sea and negotiated the gap between Iceland and the Faroe Islands. She crossed the Atlantic Ocean and attacked Allied shipping in the area of the Gulf of St. Lawrence. One of her early victims was the "Arlyn". This ship had already been torpedoed by . U-517 finished her off on 28 August 1942. She also sank the "Donald Stewart" on 3 September 1942 northeast of Cape Whittle. The Canadian escort tried to ram, but the distance between the two vessels was too great. "U-517" then evaded a depth charge pattern.