180828-N-RG482-270 VARNA, Bulgaria (Aug. 28, 2018) Flotilla Adm. Malen Chubenkov, fleet operations admiral for the Bulgarian navy, listens as civil service mariner Jonathan Keffer, civilian master of the Spearhead-class expeditionary fast transport ship USNS Carson City (T-EPF 7), explains elements of the ship's engine room during a tour in Varna, Bulgaria, Aug. 28, 2018. Carson City is the seventh of nine expeditionary fast transport ships in Military Sealift Command's inventory with a primary mission of providing rapid transport of military equipment and personnel in theater via its 20,000 square foot reconfigurable mission bay area and seating for 312 passengers. (U.S. Navy photo by Mass Communication Specialist 1st Class Kyle Steckler/Released)