By Craig Clark Throughout my years as the owner and senior scuba instructor at the Aquatic Center of Ocala, I have witnessed significant changes in the scuba diving industry, particularly in how basic Open Water certification courses are taught. While advancements in equipment, training techniques, and safety procedures have greatly improved our sport, I believe one area deserves greater attention: the medical science behind diving and the prevention of decompression sickness

As a scuba instructor, one of the most common questions I hear from people interested in learning to dive is, “Which certification agency should I choose?” There are several well-established scuba training organizations, including PADI (Professional Association of Diving Instructors), SSI (Scuba Schools International), NAUI (National Association of Underwater Instructors), and SDI (Scuba Diving International). While their teaching methods and course structures differ somewhat