The Master Scuba Diver ChallengeJoin the best of the best in recreational scuba diving and live the dive life as a PADI Master Scuba Diver. The Master Scuba Diver rating places you in an elite group of respected divers who have earned this rating through both significant experience and scuba training. Fewer than two percent of divers ever achieve this rating. When you flash your Master Scuba Diver card, people know that youve spent time underwater in a variety of environments and