PHILIPPINE SEA (Dec. 4, 2020) Sonar Technician (Surface) 2nd Class Joshua Farr, from Woodbridge, Va., simulates conducting counter-fire on a hostile submarine during an anti-submarine warfare drill in the combat information center aboard the Arleigh Burke-class guided-missile destroyer USS John S. McCain (DDG 56). 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)