WW2 Supernatural (Of sorts) Submarine story.
I’ve only seen about half of the film but it does have a good suspense and what the hell is going on feel to it, if you like WW2 “Horror” films then this might interest you, but it’s missing the “Nazi Zombies”
IMDB
http://www.imdb.com/title/tt0276816/
In the dark silence of the sea during World War II, the submarine U.S.S. Tiger Shark prowls on what should be a routine rescue mission. But for the shell-shocked crew, trapped together in the sub’s narrow corridors and constricted spaces, this is about to become a journey into the sensory delusions, mental deceptions and runaway fear that lurk just below the surface of the ocean and deep inside the human psyche.