200519-N-NT795-1688 SAN DIEGO (May 19, 2020) Master Chief Engineman Eric Gilbert, a diesel engine inspector assigned to Coastal Riverine Group 1, inspects the generator�s fuel filter as part of a pre-operational check aboard a Mark VI patrol boat in preparation for sea trials during a scheduled continuous maintenance availability. 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)