191212-N-NT795-141 SAN DIEGO (Dec. 12, 2019) Quartermaster 3rd Class Sean Elijah, assigned to Coastal Riverine Squadron (CRS) 3, mans the .50 caliber machine gun aboard a Mark VI patrol boat during a high value asset escort mission exercise by Coastal Riverine Group (CRG) I 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 in the coastal and inland waterways. (U.S. Navy photo by Chief Boatswain's Mate Nelson Doromal Jr./Released)