The Rift (1990)

Director: Juan Piquer Simón
Cast: Deborah Adair, Ely Pouget, Emilio Linder, Jack Scalia, John Toles-Bey, R. Lee Ermey, Ray Wise, Tony Isbert

Synopsis:

An experimental submarine with a very experienced crew, the “Siren II” is sent to find out what happened to the “Siren I” after it mysteriously disappeared in a submarine rift. Things go awry when they begin to find things that shouldn’t be there…