VIRGINIA BEACH, Va. (Dec. 10, 2019) Gas Turbine Systems Technician (Mechanical) 2nd Class Grace Daugherty performs maintenance on a landing craft, air cushion assigned to Assault Craft Unit (ACU) 4 onboard Joint Expeditionary Base Little Creek-Fort Story. (U.S. Navy photo by Mass Communication Specialist 2nd Class Levingston Lewis/Released)