Triangle (2009)-I really liked this movie, I thought it was going to be a straight forward slasher movie on a ship but it surprised me and went in a totally different direction. Glad I didn't read anything about this one before I watched it.
Directed by Christopher Smith. With Melissa George, Joshua McIvor, Jack Taylor, Michael Dorman. The story revolves around the passengers of a yachting trip in the Atlantic Ocean who, when struck by mysterious weather conditions, jump to another ship only to experience greater havoc on the open seas.