Theres No Free Lunch

The primary purpose of Automatic Dependent Surveillance-Broadcast (ADS-B) is to provide the FAA with the next generation of ATC surveillance capability at lower cost. ADS-B can be more accurate while simultaneously reducing the installation and maintenance costs of existing radar systems. It permits greater coverage where radar isnt practical, such as in mountainous areas and over the Gulf of Mexico. With ADS-B, ATC expects to safely handle more traffic in the same airspace. Much of the cost justification is based on the elimination of about half of the current radar installations. But dont plan on tossing your transponder yet. Radar will still be used as backup to the ADS-B system and for TCAS.

Key Takeaways:

• Automatic Dependent Surveillance-Broadcast (ADS-B) is the FAA's new surveillance system, designed to be more accurate and cost-effective than radar, and is mandatory for transponder-equipped aircraft by January 1, 2020.
• The USA implements a dual-frequency strategy: 1090ES (international standard, required above 18,000 ft) and UAT (primarily for general aviation below 18,000 ft and for receiving free in-flight weather, FIS-B).
• While ADS-B Out is required, an optional ADS-B In system provides free access to both Traffic Information Service-Broadcast (TIS-B) for other aircraft and comprehensive weather via FIS-B, though accessing tailored traffic services often requires ADS-B Out.
• Equipping aircraft with ADS-B, particularly for general aviation, involves significant costs (thousands to tens of thousands of dollars) for users, despite the FAA's overall cost savings from reducing radar installations.

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