190424-N-WD133-010 SAN DIEGO (April 24, 2019) Capt. John Olmsted, right, civil service master of the Military Sealift Command hospital ship USNS Mercy (T-AH 19), explains some of the challenges of sailing the ship to Erica Plath, director of Strategic Mobility and Combat Logistics Division (OPNAV N42) in the office of the Chief of Naval Operations, during her recent visit to the ship. (U.S. Navy photo by Tim McCully/Released)