LONG BEACH, Calf. (March 30, 2022) Sailors assigned to Maritime Expeditionary Security Squadron (MSRON) 11 conduct underway formation drills aboard 34-foot Sea Ark patrol boats off the coast of Long Beach, Calif., as part of the Maritime Expeditionary Security Force (MESF) Boat University Advance 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.)