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Definition of Identification, friend or foe

Babylon English

IFF, (in Airplanes) electronic device that transmits a 4-digit identification code to the scanning surface radar in order to identify itself as "friendly" aircraft
Identification, friend or foe Definition from Government Dictionaries & Glossaries
DOD Dictionary of Military Terms
A device that emits a signal positively identifying it as a friendly. Also called IFF. See also air defense.
  
Source: U.S. Department of Defense, Joint Doctrine Division. ( About )
Identification, friend or foe Definition from Science & Technology Dictionaries & Glossaries
Telecommunication Standard Terms
A system using electromagnetic transmissions to which equipment carried by friendly forces automatically responds, for example, by emitting pulses, thereby distinguishing themselves from enemy forces. [JP1] Note: The secondary surveillance radar (SSR) system used in modern air traffic control systems is an outgrowth of the military IFF system used during World War II. The IFF equipment carried by modern military aircraft is compatible with the transponder system used for civilian air traffic control.
Identification, friend or foe Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
Identification, friend or foe (IFF) is an identification system designed for command and control. It enables military and national (civilian air traffic control) interrogation systems to identify aircraft, vehicles or forces as friendly and to determine their bearing and range from the interrogator. IFF may be used by both military and civilian aircraft.

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