Inside the hanger bay of the US Navy (USN) Nimitz class USS CARL VINSON (CVN 70) Lieutenant Commander (LCDR) T. J. Berhow observes the Aqueous Film Forming Foam (AFFF) sprinklers in the bay for proper operation during a test of the countermeasure wash down system. AFFF is a fire-fighting agent that is most effective when combating fuel fires associated with aircraft operations. CARL VINSON is homeported at Naval Station Bremerton, Washington (WA), and is conducting sea trials to test newly installed technologies in preparation for upcoming scheduled operations