170410-N-NI812-045 PACIFIC OCEAN (April 10, 2017) Sailors calibrate an Aqueous Film Forming Foam gauge aboard the aircraft carrier USS Nimitz (CVN 68), April 10, 2017, in the Pacific Ocean. Nimitz is currently underway conducting Composite Training Unit Exercise (COMPTUEX) with the Nimitz Carrier Strike Group in preparation for an upcoming deployment. COMPTUEX tests a carrier strike group's mission-readiness and ability to perform as an integrated unit through simulated real-world scenarios. (U.S. Navy photo by U.S. Navy Mass Communication Specialist Seaman Ian Kinkead/Released)