SEAL BEACH, Calif. (March 9, 2022) Sailors assigned to Maritime Expeditionary Security Squadron (MSRON) 11 operate a 34-foot Sea Ark patrol boat during boat crewman and engineering training as part of Maritime Expeditionary Security Force (MESF) Boat University Basic-Course. MESF 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.)