|Ordered:||15 August 1940|
|Builder:||Deutsche Werft, Hamburg|
|Laid down:||10 June 1941|
|Launched:||9 June 1942|
|Commissioned:||22 July 1942|
|Fate:||Sunk 22 March 1943 in the North Atlantic in position Coordinates: , by depth charges from a RAF Whitley bomber.|
|Class and type:||Type VIIC submarine|
|Draught:||4.74 m (15 ft 7 in)|
|Complement:||4 officers, 40–56 enlisted|
|Operations:||20 February – 22 March 1943|
|Victories:||1 merchant ship sunk (7,134 GRT)|
German submarine U-665 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 10 June 1941 by Deutsche Werft, Hamburg as yard number 814, launched on 9 June 1942 and commissioned on 22 July 1942 under Leutnant zur See Hans-Jürgen Haupt.
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-665 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged. 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 Siemens-Schuckert GU 343/38–8 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).
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). 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-665 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 two twin 2 cm (0.79 in) C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.
The boat's career began with training at 5th U-boat Flotilla on 22 July 1942, followed by active service on 1 February 1943 as part of the 1st Flotilla for the remainder of her short service. In her sole patrol she sank one merchant ship, for a total of 7,134 gross register tons (GRT).
U-665 took part in three wolfpacks, namely
- Neuland (4–6 March 1943)
- Ostmark (6–11 March 1943)
- Stürmer (11–20 March 1943)
U-665 was sunk on 22 March 1943 in the North Atlantic at , by depth charges from an Armstrong Whitworth Whitley VII of No. 10 Operational Training Unit RAF (10 OTU) (call-sign Q), for the loss of all hands.
Summary of raiding history
|17 March 1943||Fort Cedar Lake||United Kingdom||7,134||Sunk|
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- Busch, Rainer; Röll, Hans-Joachim (1999). German U-boat commanders of World War II : a biographical dictionary. Translated by Brooks, Geoffrey. London, Annapolis, Md: Greenhill Books, Naval Institute Press. ISBN 1-55750-186-6.
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