170421-N-TP832-041 JACKSONVILLE, Fla. (April 21, 2017) Naval Air Crewman swim in a relay during the 2017 Naval Helicopter Association Region 3 Aircrew Competition. Ten teams of four Sailors competed in a six-mile course consisting of pull-ups, swimming, running, a canoe relay and callisthenic exercises. (U.S. Navy photo by Mass Communication Specialist 3rd Class Michael Lopez /Released)