Navy Seaman Marshena Pope operates a sound powered telephone during a replenishment-at-sea aboard the amphibious assault ship USS Essex in the Pacific Ocean, March 11, 2018. Pope is a boatswain’s mate. Essex Amphibious Ready Group is completing the Navy’s first full-length surface warfare advanced tactical training exercise, led by the Naval Surface and Mine Warfighting Development Center and designed to increase warfighting proficiency, lethality and interoperability of participating units. Navy photo by Petty Officer 2nd Class Chandler Harrell