Other mistake: After being torpedoed, John Wayne orders Burke to radio Pearl Harbor. Burke asks "And break radio silence?" to which Wayne sarcastically replies "don't you think the Japanese know our position?" Actually, a submerged WWII sub could not transmit (radio) without surfacing. Having run up on the submerged sub by chance, only the sub knew their position at that moment. Breaking radio silence did in fact give their position away to the Japanese command.