PHILIPPINE SEA (Dec. 15, 2020) Sailors stand watch in the sonar control station aboard the Arleigh Burke-class guided-missile destroyer USS John S. McCain (DDG 56) during an anti-submarine warfare training evolution. McCain is assigned to 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 Markus Castaneda)