Audio problem: When the burning USS Haynes is about to ram the disabled submarine, two Germans open fire on the destroyer with a deck-mounted Oerlikon autocannon. However, the sound of the cannon firing heard in the movie is far too slow to match the real thing, and in a segment where the cannon's muzzle flash is seen, it flickers far too quickly to accommodate the slower reports. (01:26:33)
The Enemy Below (1957)
1 audio problem - chronological order
Directed by: Dick Powell
Starring: Robert Mitchum, David Hedison, Theodore Bikel, Curd Jürgens
Other mistake: Near the beginning of the movie, at the same time the ship makes radar contact, the sub acquires a signal on its oscillator. The sub captain thinks it's a false echo due to the rough seas. He so advises the next man that comes on duty but tells him that if the signal appears to get any closer, "you will awaken me immediately." The captain isn't awakened until the "dive" alarm sounds after the men in the conning tower make visual contact with the ship. Wouldn't the oscillator signal closing in on the sub have warned them long before they made visual contact?
Captain Murrell: I have no idea what he is, what he thinks. I don't want to know the man I'm... trying to destroy.
Trivia: The number of the (fictional) USS Haynes is DE-181. This number was actually used for the USS Straub - an actual Cannon Class escort destroyer.