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Brown shoe Navy:
Non aviation officer, chief, CWO.




In Country:
Those serving on land or river patrol in VietNam.




Swimmer:
Viet Cong in water attempting to place explosive charge on ship's hull.




Chain Locker:
Area below decks where anchor chain is stored.




Boot Ensign:
Just commissioned & at first duty station.




Piece:
Rifle.




Eyes Only:
Communication meant for specifically named person.




HUMINT:
Human Intelligence.




ELINT:
Electronic Intelligence




RPS:
Registered Publication System.




H&I:
Harassment & Interdiction.




NGFS:
Naval Gunfire & Support.




EFI Only:
Encrypted For Information Only.




ESI:
Extra Sensitive Information.




QRK:
Pronounced Querking followed by a number - used in Comm such as signal QRKing 5by (best signal).




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