A non-profit scuba diving and dive safety association providing expert medical advice for underwater injuries, emergency information, research, and products.

A non-Profit group composed of diving scientists who are dedicated to the establishment and maintenance of standards for scientific diving.

UK-based not-for-profit organization, dedicated to facilitating projects that enhance global coral reef conservation and research, offering opportunities to volunteers. Includes news, expeditions, and contact information.

A non-profit environmental organization dedicated to ocean conservation with large stock photo archive.

Represents companies whose mission is to promote and help provide growth within recreational diving. Includes news, calendar of events, and information on membership.

Official website of the CDAA. Information on training, dive sites, site maps, news, instructors, products and photographs.

Advises three UK diving organizations - BSAC, SAA and SSAC on medical issues including fitness to dive. Includes medical standards, referees, research reviews, and contact information.

A Commonwealth Government not-for-profit diver training and accreditation scheme, for occupational divers.

Based in Canada, with worldwide operations. Lists ACUC dive centers, information about training programs, and provides some online services for Canadian and USA members.

A non-profit organization for rescue and recovery divers. Features membership and conference information, mission statement, contacts, news and photos.