150715-N-OI810-170 PACIFIC OCEAN (July 15, 2015) An MH-60S Sea hawk helicopter assigned to the Black Knights of Helicopter Sea Combat Squadron (HSC) 4, transfers supplies from the Military Sealift Command fleet replenishment oiler USNS Yukon (T-AO 202) to the aircraft carrier USS Ronald Reagan (CVN 76) during a replenishment-at-sea. Reagan is underway off the coast of Southern California. (U.S. Navy photo by Mass Communication Specialist 3rd Class Nathan Burke/Released)