|Ordered||21 Nov 1936|
|Laid down||21 Dec 1937||AG Weser, Bremen (werk 947)|
|Launched||16 Feb 1939|
|Commissioned||15 Jul 1939||Kptlt. Rolf Dau|
|Successes||1 ship damaged, total tonnage 4,803 GRT|
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-42 did not suffer any casualties (we know of) until the time of her loss.