| Blueventures Conservation | | 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. |
| DAN Divers Alert Network | | A non-profit scuba diving and dive safety association providing expert medical advice for underwater injuries, emergency information, research, and products. |
| Divers Recall | | US centric, organization for deep sea divers, commercial and military, retired and active. |
| Dizzy Divers | | Fundraising charity for disabled diving training. Includes on-line store, members, sponsors, and humor. |
| DMT Training Group | | Providing paramedic training for commercial and recreational scuba instructors. HSE/IMCA training standards for commercial diving. HSE (UK) medical required for all programmes. Courses offered are DMT-Basic, DMT-Intermediate, DMT-Para Medic, Hyperbaric Chamber Operations and Emergency Diving Accident Management. |
| Midwest Technical Recovery Team | | Dive team which provides assistance in the recovery of persons or evidence in the Great Lakes region especially in environments beyond recreational diving limits. Includes description of training, FAQ, and photographs. |
| Oceanic Research Group | | A non-profit environmental organization dedicated to ocean conservation with large stock photo archive. |
| San Marcos Area Recovery Team | | SMART Divers was organized to assist public service agencies and organizations with underwater search, recovery, and crime scene investigations. |
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