SOUTH CHINA SEA (March 14, 2022) Izaiah Irby, from Greenville, S.C., uses a sextant to measure the angular distance of the sun aboard the Arleigh Burke-class guided-missile destroyer USS Ralph Johnson (DDG 114). Ralph Johnson is assigned to Task Force 71/Destroyer Squadron (DESRON) 15, the Navy's largest forward-deployed DESRON and the U.S. 7th fleet's principal surface force. (U.S. Navy photo by Mass Communication Specialist 2nd Class Samantha Oblander)