“Dangerous Waters” (*1/2 out of four) was a waterlogged suspense melodrama about a young girl (Odeya Rush) on a seafaring vacation with her mother (Saffron Burrows) and her mother’s boyfriend (Eric Dane) and soon finds out that he has a dark past that threatens them all while they are out in the middle of nowhere. “Dead Calm” told virtually the same story with a lot more tension and terror and sheer filmmaking skill over 35 years ago; this drifts aimlessly and off-course for nearly 2 hours. Ray Liotta died during filming and is barely in the film despite top billing.