FAA issued Advisory Circular 90-114 regarding usage of Automatic Dependent Surveillance-Broadcast (ADS-B) technology in compliance with FAR 91.225 and 91.227. These regulations require aircraft operating in certain classes of airspace to be equipped with ADS-B Out beginning Jan. 1, 2020. The circular contains guidance on compliance, including an overview of the ADS-B system, general operating procedures and performance requirements.


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