170907-N-UH661-029 PACIFIC OCEAN (Sept 7, 2017) Aviation Boatswain's Mate (Fuel) Airman Cody Ehlert tests a fuel sample through a fuel system icing inhibitor aboard the aircraft carrier USS John C. Stennis (CVN 74) during a replenishment-at-sea. John C. Stennis is underway conducting carrier qualifications and training for future operations after completing flight deck certification. (U.S. Navy photo by Mass Communication Specialist 3rd Class Mike Pernick/Released)