"Blue Water Divers, the longest-running PADI dive center on the island, offers year-round morning dive trips (two tanks, meaning two separate sites, departing at 9 a.m. in the summer and 10 a.m. in the winter and lasting about four hours, starting at $130) and, during the summer, afternoon one- and two-tank tours departing at 2 p.m., as well as PADI certification courses of all levels."