170518-N-TU932-043 BREMERTON, Wash. (May 18, 2017) Sailors use a gantry assembly to reinstall a catapult cylinder aboard the aircraft carrier USS John C. STenn.is' (CVN 74). John C. Stennis is conducting a planned incremental availability at Puget Sound Naval Shipyard and Intermediate Maintenance Facility, while undergoing scheduled maintenance and upgrades. (U.S. Navy photo by Mass Communication Specialist 3rd Class Sierra D. Langdon/Released)