I first saw this movie in the galley of the U.S.S. Silversides - the very submarine whose exploits the movie chronicles (the name was changed to "Copperfins" for the movie.) The story is well-written, and (mostly) true. The lone crewman who was ever killed was not knifed by a rescued Japanese pilot, but they did perform an appendectomy in the galley. Sure, it's an American wartime rah-rah, stir up people's patriotism effort, but it's still fine entertainment with just the right touch of humor. A must-see.