Type | VIIC | |||||||||
| Ordered | 20 Jan 1941 | |||||||||
| Laid down | 1 Dec 1941 | Blohm & Voss, Hamburg (werk 620) | ||||||||
| Launched | 20 Aug 1942 | |||||||||
| Commissioned | 15 Oct 1942 | Oblt. Kurt Jensen | ||||||||
| Commanders |
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| Career 1 patrol |
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| Successes | No ships sunk or damaged | |||||||||
| Fate | Left Bergen, Norway on 18 March, 1943. Sunk 7 April, 1943 in the North Sea north-west of Narvik, Norway, in position 69.38N, 05.40W, by torpedoes from the British submarine HMS Tuna. 45 dead (all hands lost). | |||||||||
Wolfpack operations
U-644 operated with the following Wolfpacks during its career:
Eisbär (27 Mar 1943 - 7 Apr 1943)
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-644 did not suffer any casualties (we know of) until the time of her loss.
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