Navy frogman goes on super secret mission to steal ultra secret Jap code books. Pretty phony actually - seems the Nips would have shouted "oy li chu dat lee ho phuk di hong fong fuuuuuuuuu!", or "those explosions looked like a ruse, let's check on the code books!". When Garner exited the water he made enough noise to wake the whole island, no real commando would have done that. Still not a bad film, fairly exciting: it had the usual Navy ships during combat footage plus a few "toys in the tub" scenes. I appreciated the submarine; it was cramped, hot, and miserable looking, exactly like the genuine article. I abhor those movie subs that sport hallways and rooms more fitting to the Trump mansion than a Naval vessel.