|Ordered||20 Jan 1941|
|Laid down||5 Jun 1943||Kriegsmarinewerft (KMW), Wilhelmshaven (werk 160)|
|Launched||25 Mar 1944|
|Commissioned||9 May 1944||Oblt. GŁnter Ruperti|
|Successes||No ships sunk or damaged|
Sunk at 2002hrs on 15 Oct, 1944 near Wilhelmshaven, Germany, in position 53.51N, 08.10E, by British bombs during an air raid.
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-777 did not suffer any casualties (we know of) until the time of her loss.