UB38 sank near Varne Bank in the English Channel in April 1918 when it ran into a minefield while fleeing British destroyers. There were 27 crew on board at the time. It is said to be responsible for sinking 40 Allied ships.
Minimum clearance in the area is now 26.5 metres, but the wreck comes up to 23.5 metres. Consequently Trinity House, which is responsible for marking shipping lanes in England and Wales, arranged for the U-boat to be moved 2 miles away and placed in 40 metres of water.
UB38 is not an official war grave, but talks were held with the German Government about the project.
There is some information on Northern Divers site, plus a BBC article. And here’s a YouTube video on diving it:
