Above Us the Waves
In World War II, the greatest threat to the British navy is the German battleship Tirpitz. While anchored in a Norwegian fjord, it is impossible to attack by conventional means, so a plan is hatched for a special commando unit to attack it, using midget submarines to plant underwater explosives.
CinemaSerf@Geronimo1967
John Mills sets off to convince a sceptical Admiral (James Robertson Justice) of the merits of "midget" submarines in active warfare. His intention is to use these tiny craft to lay high explosives underneath the hull of the mighty Nazi battleship "Tirpitz" that is safely anchored in a steep-sided Norwegian fjord. John Gregson and Donald Sinden join him on the mission deep into the heart of enemy territory fighting both the elements and the novel technology. You get a sense of he claustrophobic conditions - and of the close teamwork that engenders, as well as the fragility of their craft and; tempered by the odd light-hearted moment, this is quite a gripping little wartime tale.