SAN DIEGO (July 20, 2021) Electronics Technician 2nd Class Alina Martinez, assigned to Maritime Expeditionary Squadron (MSRON) 11, casts off a line from a 34-foot Sea Ark patrol boat during Maritime Expeditionary Security Group (MESG) 1's INSURV onboard Naval Amphibious Base Coronado, Calif. The primary mission of MESF is to conduct maritime security operations across all phases of military operations by defending high value assets, critical maritime infrastructure, ports, and harbors both inland and on coastal waterways against enemies and when commanded conduct offensive combat operations. (U.S. Navy photo by Chief Boatswain's Mate Nelson Doromal Jr.)