Watch The Rift 1990 subtitles. Director by Juan Piquer Simón, Starring Jack Scalia, R. Lee Ermey, Ray Wise,
An experimental submarine, the "Siren II", with a very experienced crew is sent to find out what happened to the "Siren I" after it mysteriously dissapeared in a submarine rift. Things go awry when they begin to find things that shouldn't be there...