190424-N-WD133-003 SAN DIEGO (April 24, 2019) A member of the Military Sealift Command hospital ship USNS Mercy (T-AH 19) military treatment facility explains the CAT scan machine to Erica Plath, director of the Strategic Mobility and Combat Logistics Division (OPNAV N42) in the office of the Chief of Naval Operations. Plath toured the ship as part of a visit to San Diego. (U.S. Navy photo by Tim McCully/Released)