190918-N-HX510-0076 ATLANTIC OCEAN (Sept. 18, 2019) Sailors conduct a test of the countermeasure wash-down system on the flight deck of the aircraft carrier USS John C. Stennis (CVN 74) in the Atlantic Ocean, Sept. 18, 2019. John C. Stennis is underway conducting routine operations in support of Commander, Naval Air Force Atlantic. (U.S. Navy photo by Mass Communication Specialist Seaman Jarrod A. Schad/Released)