180321-N-NT795-364 SAN CLEMENTE ISLAND, Calif. (March 21, 2018) Electronic Technician 3rd Class Justin Davis, assigned to Coastal Riverine Squadron (CRS) 3, fires a .50-caliber machine gun aboard a Mark VI patrol boat while conducting a live-fire exercise provided by Coastal Riverine Group (CRG) 1 Training and Evaluation Unit. CRG-1 provides a core capability to defend designated high value assets throughout the green and blue-water environment and providing deployable adaptive force packages worldwide in an integrated, joint and combined theater of operations. (U.S. Navy photo by Chief Boatswain's Mate Nelson Doromal Jr./Released)