200610-N-NT795-312 SAN DIEGO (June 10, 2020) Chief Boatswain’s Mate Rob Roy, from Blackfoot, Idaho, assigned to Coastal Riverine Group 1, records engines performance parameters as part of boat engineer’s routine checks during Mark VI patrol boat operators course. 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/Released)