Page 19 - Jan25

What are MON airports?
The FAA has designated certain airports as MON airports as part of its plan to modernize the NAS and ensure the safety and efficiency of air travel. MON airports are strategically selected airports that maintain specific navigation and approach capabilities to support aircraft operations during GPS disruptions. The FAA considers several factors when designating MON airports, including:
Location: Airports are strategically located throughout the country to provide adequate coverage and accessibility.
Airport infrastructure: The airport must have the necessary infrastructure to support instrument approaches, such as runway lighting and communication systems.
Air traffic density: Airports with higher air traffic volumes are more likely to be designated as MON airports.
These airports have instrument approach procedures that are not reliant on GPS technology, such as ILS, LOC and VOR approaches. Users can navigate through an interference event or land at a MON airport without GPS, DME, ADF or surveillance. By providing a reliable backup navigation system, MON airports help mitigate the risks associated with GPS disruptions and maintain the
Figure 6: MON airport depiction
continuity of air traffic operations. Users not equipped with GPS can still operate in the NAS, but likely with reduced efficiency. There are no changes to current equipment or flight plan filing requirements.
The FAA publishes a list of MON airports in the chart supplement (formerly known as the airport/facility directory). This publication is available in both printed and digital formats. You can also find information on MON airports through various online resources, such as FAA websites and aviation publications.
See Figure 6 for how the IFR Low Chart depicts MON airports with green “MON” text. Pilots are responsible
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