180717-N-ZA692-0042 PACIFIC OCEAN (July 17, 2018) Aviation Machinist Mate 3rd Class Aaron Williams assigned to Helicopter Maritime Strike Squadron 37 (HSM-37) performs an engine water wash on an MH-60R helicopter on the deck of guided-missile destroyer USS Preble (DDG 88) during the Rim of the Pacific (RIMPAC) exercise. USS Preble is conducting routine operations in the U.S. 3rd Fleet area of responsiblity. (U.S. Navy photo by Mass Communication Specialist 2nd Class Anita C. Newman/Released)