The best quality file you'll ever find for this movie. ;)
Not my rip, all thanks to the original ripper and uploader from Cinemageddon.
An experimental submarine, the "Siren II", with a very experienced crew is sent to find out what happened to the "Siren I", misteriously dissapeared in a submarine rift. Things go awry when they begin to find things that shouldn't be there...
Directed by Juan Piquer Simón
Cast: Jack Scalia, R. Lee Ermey, Ray Wise and cameo by Edmund Purdom.