When Sammy Mutterperl (John Rhys-Davies) goes on his shooting rampage at the train station, the sound of his MP40 is dubbed over. The sound of firing is faster than the cycling bolt.
When the Moray sails into Pearl Harbor to a hero's welcome, there is a film camera visible rising on a crane in one shot photographed from the deck of the submarine. The camera is filming the previous shot, a crane shot from the dock, rising up the backs of the members of a Navy band as the submarine approaches.