History
Nazi Germany
Name	U-613
Ordered	15 August 1940
Builder	Blohm & Voss, Hamburg
Yard number	589
Laid down	6 May 1941
Launched	29 January 1942
Commissioned	12 March 1942
Fate	Sunk on 23 July 1943 in the North Atlantic in position 35°32′N 28°36′W / 35.533°N 28.600°W / 35.533; -28.600, by depth charges from USS George E. Badger.
General characteristics
Class and type	Type VIIC submarine
Displacement	769 tonnes (757 long tons) surfaced 871 t (857 long tons) submerged
Length	67.10 m (220 ft 2 in) o/a 50.50 m (165 ft 8 in) pressure hull
Beam	6.20 m (20 ft 4 in) o/a 4.70 m (15 ft 5 in) pressure hull
Draught	4.74 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	2 shafts 2 × diesel engines 2 × electric motors
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)
Complement	4 officers, 40–56 enlisted
Armament	5 × 53.3 cm (21 in) torpedo tubes (four bow, one stern) 14 × torpedoes or 26 TMA mines 1 × 8.8 cm (3.46 in) deck gun (220 rounds) 1 x 2 cm (0.79 in) C/30 AA gun
Service record[1]
Part of:	8th U-boat Flotilla 12 March – 31 October 1942 3rd U-boat Flotilla 1 November 1942 – 23 July 1943
Identification codes:	M 44 892
Commanders:	Kptlt. / K.Kapt. Helmut Köppe 12 March 1942 – 23 July 1943
Operations:	4 patrols: 1st patrol: 22 October – 27 November 1942 2nd patrol: 9 January – 18 February 1943 3rd patrol: 23 March – 6 May 1943 4th patrol: 10 – 23 July 1943
Victories:	2 merchant ships sunk (8,087 GRT)

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 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged.^[2] 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 Brown, Boveri & Cie GG UB 720/8 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).^[2]

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).^[2] 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-613 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, and a 2 cm (0.79 in) C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty.^[2]

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 8,087 gross register tons (GRT).

U-613 took part in six wolfpacks, namely:

• Natter (2 – 8 November 1942)
• Westwall (8 – 18 November 1942)
• Habicht (10 – 19 January 1943)
• Haudegen (19 January – 9 February 1943)
• Adler (7 – 13 April 1943)
• Meise (13 – 25 April 1943)

U-613 was sunk on 23 July 1943 in the North Atlantic south of the Azores, in position 35°32′N 28°36′W / 35.533°N 28.600°W / 35.533; -28.600, by depth charges from USS George E. Badger. All hands were lost.

Date	Ship Name	Nationality	Tonnage (GRT)	Fate[3]
7 November 1942	Roxby	United Kingdom	4,252	Sunk
11 April 1943	Ingerfire	Norway	3,835	Sunk

• Helgason, Guðmundur. "The Type VIIC boat U-613". German U-boats of WWII - uboat.net. Retrieved 29 December 2014.