The amphibious assault ship USS Bataan (LHD-5) floats alongside the fleet replenishment oiler USNS Big Horn (T-AO 198) and the amphibious dock landing ship USS Carter Hall (LSD-80) in preparation for a replenishment-at-sea during Amphibious Ready Group Marine Expeditionary Unit Exercise off the coast of North Carolina, Dec. 8, 2016. U.S. Navy ships conduct a RAS periodically while out to sea to maintain operations while underway. (U.S. Marine Corps photo by Lance Cpl. Autmn Bobby)