ADS-B Mandate Goes into Effect:

The FAA has mandated that all aircraft flying in most controlled airspace's must be equipped with ADS-B Out (the ability to broadcast their position to the ADS-B network) by January 1, 2020.  ADS-B Out avionics use on board navigation equipment to derive an aircraft’s position, which is then broadcasted to air traffic control services and for use by other aircraft.


ADS-B stands for Automatic Dependent Surveillance–Broadcast:

  • Automatic because it periodically transmits information with no pilot/operator involvement.

  • Dependent because the position and velocity vectors are derived from the Global Positioning System (GPS) or other suitable Navigation Systems (i.e.,FMS).

  • Surveillance because it provides a method of determining 3-Dimensional position and identification of aircraft, vehicles, or other assets.

  • Broadcast because it transmits the information available to anyone with the appropriate receiving equipment.

ADS-B replaces radar technology with satellites, bringing major advantages. Radar relies on radio signals and antennas to determine an aircraft's location, while ADS-B uses satellite signals to track aircraft movements.

An ADS-B Out transmitter alone will not be sufficient to meet the requirements outlined in 14 CFR 91.227. To comply with the requirements for the ADS-B Rule, the aircraft must be equipped with a Version 2 ADS-B Out transmitter and a compatible GPS Position Source.


There are two ADS-B avionics systems available:

  • Mode-S transponder-based (1090MHz) ADS-B equipment certified toTechnical Standard Order (TSO) C166b
  • Universal Access Transceiver (UAT) equipment certified to TSO-C154c.

For aircraft operating above FL180 (18,000 ft.), or to comply with ADS-B mandates outside the United States, you must be equipped with a Mode-S transponder-based ADS-B transmitter. For aircraft operating below 18,000 ft. and within the United States ADS-B rule airspace, you must be equipped with either a Mode-S transponder-based ADS-B transmitter or with UAT equipment

So, what does all this mean for me? 

Although there are quite a few solutions out there to make sure your aircraft is meeting FAA standards and regulations, most of them aren't the best solutions for your applications.  There is often confusion over ADS-B in and out.  Too often we see people spend thousands of dollars on "solutions" for their aircraft only to find out that it is not the correct solution or it is not a certified combination of equipment.  AMS Avionics is offering a free ADS-B consultation. Bring your airplane by and we will take a look at your current equipment.  Based on the type of flying you do and the benefits you would like to receive from the ADS-B system, we will recommend the most beneficial and cost-effictive certified solution for your aircraft.  Click the button below to schedule your free ADS-B consultation.