|Ordered||25 May 1941|
|Laid down||17 Oct 1942||Blohm & Voss, Hamburg (werk 190)|
|Launched||16 Jun 1943|
|Commissioned||28 Jul 1943||Kptlt. Hubert Nordheimer|
|Successes||1 warship sunk, total tonnage 1,920 tons|
Sunk 25 May 1944 in North Sea west of Bodö, in position 65.05N, 07.28E, by depth charges from a British Liberator aircraft (Sqdn. 59/S). 20 dead and 33 survivors.
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-990 did not suffer any casualties (we know of) until the time of her loss.