 Artificial Reef Society of British Columbia (ARSBC)
 - Creates and promotes artificial reefs on the west coast of Canada for use by SCUBA divers.- NAUI Services Canada
- Official Canadian service centre for NAUI products and services including non-leadership certifications.
- BFDC and North Carolina SCUBA/Wreck Diving
- Information about NC wreck diving and BFDC activities.
- Chicago Aquanauts Scuba Association
- Family oriented scuba club offering training, fun and fellowship.
- CMAS - Confédération Mondiale des Activités Subaquatiques
- World underwater federation.
- Divers Alert Network (DAN) (3)
- Global Underwater Explorers
- Dive certification for overhead, technical, and exploration diving, as well as aquatic activity in education, research, and exploration.
- Greater Los Angeles Council of Divers
- Organized to represent the recreational diving community on issues concerning safety, access, conservation, and competitive events.
- HSA International
- Internationally recognized certifying organization for disabled scuba divers.
- International Association of Nitrox and Technical Divers
- IANTD is the only EANx agency that offers training in all aspects of EANx through continuing education programs.
- International Association of Technical and Nitrox Divers, Inc
- Training organization of Nitrox, enriched and enhanced air, technical divers and instructors.
- International Diving Educators Association (IDEA) (1)
- MOAV
- Mystic Order of Aquatic Vigilance. also known as the highest power in the deepest water.
- National Association of Black Scuba Divers (NABS)
- Family-oriented club whose member interests focus on the promotion of scuba diving, environmental conservation, and education. Includes news, events, and more.
- NAUI
- Official site for the National Association of Underwater Instructors for use by scuba divers of all associations to promote diving safety and education.
- Odyssey Expeditions (1)
- PADI
- Official site for the Professional Association of Diving Instructors.
- Recreational Divers Association
- Worldwide network of local chapters sharing experiences for knowledge and fun. Offers educational programs, social events and a newsletter.
- Sub-Aqua Association
- Representative body for independent SCUBA diving clubs in the U.K.
- United States Dental Diving Association, Inc. (USDDA)
- Offers a combined dental seminar and scuba diving trip to locations worldwide.
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