Jan. 1, 2020, might seem like a long time away to some, but the FAA’s publication of an updated advisory circular (AC)–AC 90-114A–last week makes it clear there’s work ahead to prepare aircraft and operators for the requirements of ADS-B In and Out, also covered under FAR 91.225 and 91.227. The updated AC is not mandatory and suggests one method of compliance with the upcoming regulations.
While there is no FAA authorization required for aircraft operating in U.S. airspace, some ICAO states do require such a document. The AC offers the most current descriptions of the ADS-B architecture, as well as details about the technology, such as an explanation of the dual transmission frequencies and the general operating procedures that will become mandatory in slightly more than five years.
An updated list of transponder codes for ADS-B In and Out is provided, along with an outline of suggested preflight procedures for entering ADS-B message elements. The AC’s appendices are also rich with details of ADS-B operations outside the U.S., as well as the in-trail separation procedures international aircraft can expect and a look at the upcoming cockpit assisted visual separation system offered through ADS-B.