180220-N-NT795-120 SAN DIEGO (February 20, 2018) Electronic Technician 2nd Class William Buckelew, assigned to Coastal Riverine Squadron (CRS) 3, mans the M240 machine gun aboard a Mark VI patrol boat during unit level training conducted by Coastal Riverine Group (CRG) 1's 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)