SOUTH CHINA SEA (Sep. 2, 2021) Hospital Corpsman 3rd Class Shannan Moore, from Chesapeake, Va., instructs medical training on the mess decks aboard Arleigh Burke-class guided-missile destroyer USS O�Kane (DDG 77). O�Kane is deployed supporting Commander, Task Force (CTF) 71/Destroyer Squadron (DESRON) 15, the Navy�s largest forward-deployed DESRON and U.S. 7th Fleet�s principal surface force. (U.S. Navy photo by Mass Communication Specialist Seaman Elisha Smith)