| dema.org | DEMA - Diving Equipment & Marketing Association |
| gate1.net | World Clock |
| cayman.org | Scuba Diving In The Cayman Islands: Ciwoa - Cayman Islands Watersports Operator |
| cavedivers.com.au | Cave Divers Association of Australia |
| britishoctopush.org | British Octopush Association |
| blueventures.org | Blue Ventures Conservation |
| bahamasdiving.com | Bahamas Diving Association |
| adas.org.au | Australian Diver Accreditation Scheme (ADAS) |
| acuc.es | American Canadian Underwater Certifications, Inc. |
| acuc.ca | American Canadian Underwater Certifications, Inc. |
United States , Arizona , Scottsdale