Crash Dive (1997)

The crew of the nuclear submarine USS Ulysses rescues supposed victims of a boat disaster but the victims turn out to be terrorists intent on capturing nuclear weapons aboard the sub Only a former SEAL now a submarine consultant can save the crew by sliding aboard while the sub is underwater The term crash dive refers to the sudden dropping of a sub to escape detection an act that a nuclear sub is never supposed to make Of course it comes into play in this film