151107-N-DA737-185 PACIFIC OCEAN (Nov. 7, 2015) Ensign Jaclyn Istilart, from Phoenix, tracks the bearing and range of a vessel during an exercise using the maneuvering board on the bridge of the guided-missile destroyer USS Chung-Hoon (DDG 93). Sailors from the John C. Stennis Strike Group are participating in a sustainment training exercise (SUSTEX) to prepare for future deployments. (U.S. Navy photo by Mass Communication Specialist 3rd Class Jonathan Jiang/Released)