181220-N-NB544-1044 PACIFIC OCEAN (Dec. 20, 2018) The fleet replenishment oiler USNS Yukon (T-AO 202) is alongside the San Antonio-class amphibious transport dock ship USS Somerset (LPD 25) while underway in the Pacific Ocean, Dec. 20, 2018. Somerset is underway as a part of Littoral Combat Group One. (U.S. Navy photo by Mass Communication Specialist 2nd Class Kyle Carlstrom/Released)