LONG BEACH, Calif. (March 30, 2022) Engineman 1st Class Morgan Sprague, a tactical craft engineer assigned to Maritime Expeditionary Security Squadron (MSRON) 11, mans a M240 machine gun aboard a 34-foot Sea Ark patrol boat during an underway off the coast of Long Beach, Calif., as part of the Maritime Expeditionary Security Force (MESF) Boat University Advanced 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.)