The submarine used was NOT Varangian! 'It' was in fact two boats, P614 and P615, both built for Turkey by Vickers Armstorng at Barrow-in-Furness but kept hold of by the Royal Navy for the duration of the war. P615 was sunk but P614 was eventually delivered in 1945.
The confusion no doubt arose because someone looked up P61 (as I did) and found Varangian! When in fact, the last digit of both P614 and P615 was in fact just painted out....
There are some extremely realistic moments in the film. These Turkish boats were very similar to the S-class. As no S-class submarines survive, the shots of them (as P61) and of the depot ship "Forth" form part of an interesting record now, as well as an excellent film.
We Dive at Dawn
1943
Action / Drama / War

We Dive at Dawn
1943
Action / Drama / War
Plot summary
A gripping tale of WWII naval warfare in the Baltics, starring John Mills as Lt. Freddie Taylor, a British submarine Captain. The crew of the Sea Tiger are summoned from leave on shore with their families, and sent on a secret mission to intercept the Nazi battleship Brandenburg. In the ensuing battle the British submarine is damaged by a German destroyer. The submarine is leaking fuel so badly that the crew won't be able to make it back to Britain before running out somewhere along the Danish coast. When it seems that their only option may be to blow up the submarine and try to escape to Denmark, seaman James Hobson hatches a plan...