|Ordered||7 Dec 1940|
|Laid down||14 Jun 1941||Flender Werke AG, Lübeck (werk 303)|
|Launched||16 May 1942|
|Commissioned||7 Jul 1942||Kptlt. Karl-Franz Heine|
|Successes||1 ship sunk, total tonnage 4,959 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-303 did not suffer any casualties (we know of) until the time of her loss.