German submarine U-613 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II.She was laid down on 6 May 1941 by Blohm & Voss, Hamburg as yard number 589, launched on 29 January 1942 and commissioned on 12 March 1942 under Kapitänleutnant Helmut Köppe.
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-613 had a displacement of 769t when at the surface and 871t while submerged. She had a total length of 67.1m (220.1feet), a pressure hull length of 50.5m (165.7feet), a beam of 6.2m (20.3feet), a height of 9.6m (31.5feet), and a draught of 4.74m (15.55feet). The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of NaNPS for use while surfaced, two Brown, Boveri & Cie GG UB 720/8 double-acting electric motors producing a total of 750PS for use while submerged. She had two shafts and two 1.23abbr=onNaNabbr=on 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-613 was fitted with five 53.30NaN0 torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.82NaN2 SK C/35 naval gun, 220 rounds, and a 2sp=usNaNsp=us C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty.
The boat's career began with training at 8th U-boat Flotilla on 12 March 1942, followed by active service on 1 November 1942 as part of the 3rd U-boat Flotilla for the remainder of her service.
In four patrols she sank two merchant ships, for a total of .
U-613 took part in six wolfpacks, namely:
U-613 was sunk on 23 July 1943 in the North Atlantic south of the Azores, in position 35.5333°N -64°W, by depth charges from . All hands were lost.
| Date | Ship Name | Nationality | Tonnage (GRT) | Fate[1] | |
|---|---|---|---|---|---|
| 7 November 1942 | Roxby |  United Kingdom | 4,252 | Sunk | |
| 11 April 1943 | Ingerfire |  Norway | 3,835 | Sunk |