Become a certified Open Water Scuba Diver in 3 simple steps. You will learn what you need to know to explore the underwater world using scuba equipment. Most people find it a rewarding challenge. Open Water Diver is a lifetime international certification and is your prerequisite to enroll in additional training (advanced open water, wreck diving, underwater photo, and more); you can even become a Master Scuba Diver. Requirements Minimum age is 10 (for ages 10-11 call for details); Medical form must be satisfactorily completed Swim requirements: 200-yard swim and tread/float for 10 minutes