200110-N-ZI768-1035 NEWPORT NEWS, Va. (Jan. 10, 2020) Boatswain’s Mate Seaman Deandre Conyers, left, and Boatswain’s Mate Seaman Noah Moorhead, both assigned to the deck department aboard the Nimitz-class aircraft carrier USS George Washington (CVN 73), practice knot tying and line handling procedures. George Washington is undergoing a refueling complex overhaul (RCOH) at the Newport News Shipbuilding shipyard. RCOH is a nearly four-year project performed only once during a carrier’s 50-year service life that includes refueling the ship’s two nuclear reactors as well as significant repairs, upgrades, and modernization. (U.S. Navy photo by Mass Communication Specialist Seaman Cory J. Daut/Released)