|Ordered||20 Jan 1941|
|Laid down||26 Aug 1942||Howaldtswerke AG, Kiel (werk 30)|
|Launched||6 Nov 1943|
|Commissioned||18 Dec 1943||Korvkpt. Johann Reckhoff|
|Successes||No ships sunk or damaged|
Went missing after 17 April, 1945 on the North Sea or in the Arctic, position and cause unknown. 43 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-398 did not suffer any casualties (we know of) until the time of her loss.
U-boats Missing in Action.