Abstract: At approximately 1:10 p.m. on May 24, 2011, Employee #1, a scuba diver, failed to surface after separating from his diving partner during his second and last dive of the day. At approximately 1:17 p.m., his diving team members found him unconscious on the ocean floor (approximately 108 ft below the surface). The coworkers brought Employee #1 to the surface and aboard the company dive boat. They immediately commenced cardiopulmonary resuscitation on him, who was not breathing and without a pulse. A call for assistance was immediately made to the U.S. Coast Guard. The dive boat transported him to a military ship approximately eight minutes later. At approximately 1:30 p.m., Employee #1 was placed into a hyperbaric chamber and treated with an automatic external defibrillator to establish a heartbeat. A Navy medical officer determined he needed treatment at a hospital. At approximately 3:09 p.m., Employee #1 was pronounced dead at a medical center.