Connection to Run Silent Run Deep?
Watching this for the first time, I was struck by how much of the plot seemed to be taken from the novel 'Run Silent, Run Deep' by Edward L Beach. Details in common include the faulty torpedoes (and the program to fix them), the Q-Ship (minus the ridiculous ramming scene), the Captain hit by surface fire (although as the narrator of the novel, he obviously doesn't die, but goes back to Pearl to work on the torpedoes) and the climactic rescue of the stranded airmen.
It certainly has far more in common than the Clark Gable movie supposedly based on the novel! However, the novel was published in 1955 - four years AFTER this movie was made. This makes me wonder if Beach (an actual sub commander in the Pacific) was a consultant on the movie, and had already written the book.
As one poster has pointed out, the rescue of the airman was based on an actual event. And the faulty torpedoes were also real (the British also had troubles with magnetic detonators). That would presumably make them 'public domain' plot devices, so to speak. The other details however, would definitely seem to be 'intellectual property'.
Does anyone know if Beach was involved in making this movie? Or has he actually borrowed some of the plot details for his novel?