Above Us the Waves

Above Us the Waves is a 1955 British war film about human torpedo and midget submarine attacks in Norwegian fjords against the German battleship Tirpitz. Directed by Ralph Thomas, it is based on two true-life attacks by British commando frogmen, first using Chariot manned torpedoes in Operation Title in 1942, and then X-Craft midget submarines in Operation Source in 1943. Filmed at Pinewood Studios, England, with outdoor scenes in Guernsey, some of the original war equipment was used in the film.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.