A diver demonstrates the much greater volume of air that escapes from a low-pressure hose (held in his right hand) compared to a high-pressure hose (in his left hand).
The Diver
A Free-Flowing Failure
Image by Stephen Frink
Divers Alert Network (DAN)
The largest association of recreational scuba divers in the world, DAN is supported by membership dues and donations. DAN's mission is to help divers in need of medical emergency assistance and to promote dive safety through research, education, products and diving services.