PHILIPPINE SEA (Dec. 15, 2020) Ensign Joseph Durigan, left, from Longwood, Fla., Sonar Technician (Surface) 2nd Class Joshua Farr, from Woodbridge, Va., and Operations Specialist 2nd Class Joshua Hansen, from Kissimmee, Fla. monitor a computer-aided dead-reckoning tracer (CADRT) in the combat information center 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)