International organization with certifications ranging from snorkeling to course director. Information about their online courses and community, dive centers, gear, and vacations.
PSI offers worldwide training in Visual Cylinder Inspection and High Pressures Cylinder Safety. Includes class schedule, inspector notices, and supplies.
The Governing Body for the sport of scuba diving in Scotland. Established in 1953 and proud holder of one of the best safety records in amateur diving.
International organization offering training from snorkeling through Master Instructor. Includes course information, a schedule, online training, and a scuba rangers kids club.
Technical Diving International (TDI) and Scuba Diving International(SDI)regional office located in Auckland. Find mission statement, news, photos, information on training facilities, and contacts.
Offered certifications in the United States for over 50 years, until the end of the program in 2008. Offers a way to replace lost lifetime certification cards issued after 1984.