190625-N-NT795-310 SAN DIEGO (June 25, 2019) Construction Mechanic 3rd Class Dustin McCartney, from San Jose, California, assigned to Coastal Riverine Squadron 3, mans a M2A1 .50-caliber machine gun aboard a Mark VI patrol boat during unit level training provided by Coastal Riverine Group 1 Training and Evaluation Unit. The Coastal Riverine Force is a core Navy capability that provides port and harbor security, high value asset security, and maritime security operations in the coastal and inland waterways. (U.S. Navy photo by Chief Boatswain’s Mate Nelson Doromal Jr./Released)