180221-N-YW501-052 NEWPORT NEWS, Va. (Feb. 21, 2018) Sailors assigned to the Nimitz-class aircraft carrier USS George Washington (CVN 73) study for the petty officer advancement exam. George Washington is undergoing refueling complex overhaul (RCOH) at Newport News Shipyard. (U.S. Navy photo by Mass Communication Specialist 3rd Class Jamin Gordon/Released)