190919-N-NT795-346 SAN DIEGO (Sept. 19, 2019) Electronic Technician 3nd Class Justin Davis, from Vail, Arizona, assigned to Coastal Riverine Squadron 3 mans the .50-caliber M2A1 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 security, and maritime security operations in the coastal and inland waterways. (U.S. Navy photo by Chief Boatswain’s Mate Nelson Doromal Jr./Released)