170907-N-UH661-024 PACIFIC OCEAN (Sept 7, 2017) Aviation Boatswain's Mate (Fuel) 3rd Class Alyssa Navarro, from La Puente, California, tests a fuel sample through a combined contaminated fuel detector during a replenishment-at-sea aboard USS John C. Stennis (CVN 74). 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)