What an intetesting topic for this British war film showing some Italian frogmen, vs of course the Royal Navy sailors. Yes, so surprising from an UK war film production, focusing in Italian, even if you have also a British part in the second half of the film. So far, during the fifties, British film industry offered us only solid war movies speaking of the British effort against Axis evil forces. I have seen Italian film from the fifties and sixties, speaking of the Italian Navy, combat swimmers, combat frogmen, a domain where Italian were really good. The only one; ask the Afrika Korps members concerning the war in Lybia...So, yes, this is a truly amazing and also so rare feature. Since my childhood I have never succeeded in finding this film, until today. TORPEDO BAY, made one year later, as also a British Italian war movie, where the main English role was held by James Mason instead of John Mills here. And director Roy Ward Baker already gave us another sea drama adventure yarn several years earlier with A NIGHT TO REMEMBER, about the Titanic shipwreck.