U.S. sailors and embarked midshipmen aboard the guided missile destroyer USS Preble (DDG 88) participate in a swim call Aug. 9, 2013, in the Pacific Ocean. The Preble was on patrol in the U.S. 7th Fleet area of responsibility to promote security and stability in the region. (U.S. Navy photo by Mass Communication Specialist 3rd Class Gregory A. Harden II/Released)