|Ordered||20 Jan 1941|
|Laid down||29 Aug 1942||Howaldtswerke AG, Kiel (werk 29)|
|Launched||6 Oct 1943|
|Commissioned||20 Nov 1943||Oblt. Fritz Kallipke|
|Successes||No ships sunk or damaged|
Scuttled on 5 May, 1945 in the Gelting Bay.
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-397 did not suffer any casualties (we know of) until the time of her loss.