180619-N-NT795-174 SAN DIEGO, Calif., (June 19, 2018) Gunner’s Mate Seaman Vacha, assigned to Coastal Riverine Squadron (CRS) 3, mans a .50-caliber machine gun aboard a Mark VI patrol boat during an unmanned aerial vehicle (UAV) training exercise conducted by Coastal Riverine Group (CRG) 1 Training and Evaluation Unit. CRG provides a core capability to defend designated high value assets throughout the green and blue-water environment and providing deployable Adaptive Force Packages (AFP) worldwide in an integrated, joint and combined theater of operations. (U.S. Navy photo by Chief Boatswain’s Mate Nelson Doromal Jr./Released)