"The ability to manage a diving emergency and provide care to an injured diver does not come from experience alone. The best thing you can do to prepare for the dive-related injuries is to learn everything you can about such injuries and the situations that lead to them.
Although you should be thoroughly prepared for any kind of emergency, case histories of diving accidents indicate that full-blown emergencies in which rescuers need to perform CPR and evacuate injured divers in a critical rush to a hospital are rare. Cuts, scrapes, overheating, and the need to provide emergency oxygen first aid are much more common. Of course, being prepared to deal with these more mundane situations will help you to feel more confident when faced with a series emergency."
Excerpted from Scuba Diving Safety by Dan Orr and Eric Douglas
Photo Below: Dr. David Charash asks Dan Orr to sign his copy of Scuba Diving Safety at the 2017 Beneath the Sea Show in Secaucus, New Jersey.