151219-N-XT273-068 MEDITERRANEAN SEA (Dec. 19, 2015) Boatswain’s Mate 1st Class William Dahn stands safety observer watch aboard USS Ross (DDG 71) during a replenishment-at-sea with the Military Sealift Command fleet replenishment oiler USNS Leroy Grumman (T-AO 195). Ross, an Arleigh Burke-class guided-missile destroyer, forward deployed to Rota, Spain, is conducting a routine patrol in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe. (U.S. Navy photo by Mass Communication Specialist 2nd Class Justin Stumberg/Released)