161203-N-BL637-035 PACIFIC OCEAN (Dec. 03, 2016) The fleet replenishment oiler USNS Yukon (T-AO 202) sits pierside in its homeport of San Diego. The Yukon is one of 15 Fleet Replenishment Oilers in the United States Navy. (U.S. Navy Photo by Petty Officer 3rd Class Sean M. Castellano/Released)