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 Definition A device, used in navigation, air traffic control, Safety of Life at Sea, and military operations (e.g., Identification-friend-or-foe which, when interrogated by an appropriate radio or radar signal, replies with its identification and other relevant navigation data [d] [e]
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 Workgroup categories Computers, Engineering and Military [Categories OK]
 Subgroup categories:  Marine electronics, Military information and communications and Aviation
 Talk Archive none  English language variant American English