181016-N-FD244-0005 BREMERTON, Wash. (Oct.16, 2018) A shipyard worker cleans the inside of a propeller as it is installed on the aircraft carrier USS Nimitz (CVN 68) at Puget Sound Naval Shipyard and Intermediate Maintenance Facility in Bremerton, Wash., Oct. 16, 2018. Nimitz is in a 15-month docking planned incremental availability to upgrade and renovate a variety of systems. The ship is scheduled to return to sea in May 2019 to perform sea trials in preparation for future operations. (U.S. Navy photo by Brian Kilpatrick/Released)