PADI The Professional Association of Diving Instructors. PADI is the world's largest recreational diving membership and diver training organization. PADI Members (dive centers, resorts, educational facilities, instructors, assistant instructors, and divemasters) teach the vast majority of the world's recreational divers, issuing nearly 946,000 certifications each year. PADI professionals make underwater exploration and adventure accessible to the public while maintaining a high industry standard for dive training, safety and customer service.

Pony Bottle This is simply a small scuba cylinder and an independent regulator creating a redundant air source system for out of gas emergencies or unplanned decompression stops. A redundant air source system.