Big Blue is the big kahuna of watersports in Bol, a thriving operation that caters to all levels of athletes. You can rent a board for an hour for 15€ or for a week for 150€. Big Blue also rents equipment for mountain biking, diving, and sea kayaking. You also can take a 6-day (2 hr. per day) scuba certification course for 139€, certification fee not included.