From aboard USS Kitty Hawk (CV 63) Oct. 29, 2002 -- The destroyer USS Paul F. Foster (DD 964) approaches the starboard side of the Military Sealift Command ship USNS Rappahannock (T-AO 204) to take on fuel. Replenishments at sea enable Navy ships to remain deployed at sea for indefinite periods of time. U.S. Navy photo by Photographerâs Mate 3rd Class William H. Ramsey.