180403-N-IU965-0037 PACIFIC OCEAN (April 3, 2018) Quartermaster 3rd Class Alexis Brown uses a sextant for celestial navigation aboard the Nimitz-class aircraft carrier USS Carl Vinson (CVN 70). The Carl Vinson Carrier Strike Group is operating in the western Pacific as part of a regularly scheduled deployment. (U.S. Navy photo by Mass Communication Specialist Seaman Michele Fink/Released)