150429-N-QA919-619 NAVAL SUPPORT ACTIVITY, Bahrain (April 29, 2015) - Navy Diver 2nd Class Peter O'Brien, assigned to Mobile Diving and Salvage Unit One, completes a dive during a SCUBA supervisor course. The course is intended to train and qualify divers in supervisory roles. (U.S. Navy photo by Mass Communication Specialist 3rd Class Tyler N. Thompson/ Released)