Are Mode S Transponders Required?
Background. the Faa Published a Final Rule on February 3, 1987 (52 Fr 3380), Requiring the Installation of Mode S Transponders on U. S. Registered Aircraft...
Background. The FAA published a final rule on February 3, 1987 (52 FR 3380), requiring the installation of Mode S transponders on U.S. registered aircraft.
Where is a Mode S transponder required?
For aircraft operating at or above FL180 (18,000 feet), you must be equipped with a Mode S-transponder-based ADS-B transmitter. For aircraft operating below 18,000 feet and within U.S. airspace, you must be equipped with either a Mode S transponder with Extended Squitter or a Universal Access Transceiver (UAT).
What is Mode S on a transponder?
The Mode S is a secondary surveillance and communication system which supports Air Traffic Control (ATC). Each Mode S transponder equipped aircraft is assigned a unique address code. Using this unique code, interrogations can be directed to a particular aircraft and replies can be unambiguously identified.
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