Imperial War Museum- The Official Collection: Close Quarter (2005) DVD
 
The Imperial War Musuem Collection features rare and fascinating original films preserved in the Museum's archives. Many have never been released to the public before and are presented here, complete and uncut, for the first time. Produced by the Crown Film Unit for the Ministry of Defence and the Admiralty in 1943, Close Quarters is an authentic impression of a routine wartime Royal Navy submarine patrol in the North Sea, off the coast of Norway.
 
At first the patrol is uneventful until HMS Tyrant comes across a U-boat. All the roles were performed by serving submariners (led by Lieutenant Commander Gregory) and much of the film was shot on a genuine British submarine which was still in service.