Somerset Bridge is the best outlet for renting Boston Whalers for island-hopping on your own. A 4m (13-ft.) Whaler (25 or 30 hp) carries four and costs $75 for 2 hours, $120 for 4 hours, and $200 for 8 hours, plus a gas fee of $25. Somerset provides lots of extras, such as canopies, special maps, a ladder, a viewing box, and a fish and coral ID card. "Jet Ski Adventures" cost $105 for 1 hour and 10 minutes for one person, $125 for a double. The jet ski reaches speeds of up to 81kmph (50 mph).