|Ordered||14 Oct 1941|
|Laid down||12 Sep 1942||Flender Werke AG, Lübeck (werk 317)|
|Launched||1 Sep 1943|
|Commissioned||23 Oct 1943||Oblt. Peter Rahlff|
|Successes||No ships sunk or damaged|
Sunk on 26 June 1944 in the Norwegian Sea north-east of the Shetland Islands, in position 62.03N, 01.45E, by depth charges from a British Liberator aircraft (86 Sqn RAF/N). 50 dead (all hands lost).
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-317 did not suffer any casualties (we know of) until the time of her loss.