USS Freedom (LCS-1) is the lead ship of the Freedom-class littoral combat ship for the United States Navy. She is the third vessel to be so named after the concept of freedom. She is the design competitor produced by the Lockheed Martin consortium, in competition with the General Dynamics–designed USS Independence. She was officially accepted by the Supervisor of Shipbuilding Gulf Coast, on behalf of the US Navy, from the Lockheed Martin/Marinette Marine/Gibbs and Cox team, in Marinette, Wisconsin, on 18 September 2008.

Underway replenishment (UNREP) or replenishment at sea (RAS) is a method of transferring fuel, munitions, and stores from one ship to another while under way. First developed in the early 20th century, it was used extensively by the United States Navy as a logistics support technique in the Pacific theatre of World War II, permitting U.S. carrier task forces to remain at sea indefinitely.