170412-N-FO714-0033 WATERS OFF THE COAST OF SOUTHERN CALIFORNIA (April 12, 2017) The Arleigh Burke-class guided-missile destroyer USS Chafee (DDG 90) and the Ticonderoga-class guided-missile cruiser USS Princeton (CG 59) conduct a replenishment-at-sea with the fleet replenishment oiler USNS Yukon (T-AO 202) while underway conducting a composite training unit exercise (COMPTUEX) with the Nimitz Carrier Strike Group in preparation for an upcoming deployment. COMPTUEX tests the mission readiness of the strike group's assets through simulated real-world scenarios and their ability to perform as an integrated unit. (U.S. Navy photo by Mass Communication Specialist 3rd Class Deanna C. Gonzales/Released)