- HMS Varangian (P61)
, due to the boat carrying the P61 pennant number. However the submarine in the film was in fact portrayed by two boats: P614 and P615, with their final digit painted out to disguise the fact that there were two boats being filmed [ [http://imdb.com/title/tt0036516/trivia IMDB: "We Dive at Dawn"] ] .
References
External links
* [http://www.submariners.co.uk/Boats/Barrowbuilt/UV_Class/ Submariners Association - U and V class submarines]
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