|Ordered||20 Jan 1941|
|Laid down||25 Nov 1941||Howaldtswerke Hamburg AG, Hamburg (werk 819)|
|Launched||15 Dec 1942|
|Commissioned||26 Jan 1943||Oblt. Guido Hyronimus|
|Successes||No ships sunk or damaged|
Sank at 2330hrs on 20 August 1943 in the Baltic Sea north-east of Hela, in position 54.50N, 19.15E, after a collision with the German target ship Bolkoburg. 21 dead and 22 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-670 did not suffer any casualties (we know of) until the time of her loss.