SAN DIEGO (Feb. 24, 2021) Boatswain's Mate 1st Class James Arcilla, from Angeles City, Republic of the Philippines, and a crewman gunner assigned to Maritime Expeditionary Security Squadron (MSRON) 11 conducts weapons pre-operations checks aboard 34-foot Sea Ark Patrol Boat as part of final evaluation exercises provided by Maritime Expeditionary Security Group (MSEG) 1 Training Evaluation Unit. The Maritime Expeditionary Security 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.)