200519-N-NT795-1638 SAN DIEGO (May 19, 2020) Engineman 2nd Class Shawn Steffel, from Killeen, Texas, assigned to Coastal Riverine Squadron (CRS) 3, strips fuel for quality checks 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)