Newly released edition of the FAA’s Global Navigation Satellite System (GNSS) Interference Guide. This significant update offers expanded insight into current jamming and spoofing activity, operational impacts on aircraft systems, and recommended response practices for pilots, operators, and avionics professionals.
This latest revision incorporates extensive feedback from the Performance Based Operations Rulemaking Committee’s (PARC) GPS/GNSS Disruption Action Team, along with additional refinements from FAA subject matter experts. The result is a far more detailed and actionable guide designed to improve awareness and response to GNSS interference across the National Airspace System.
The publication includes updated regional data identifying areas with the highest concentrations of GPS disruptions, including:
– Eastern Mediterranean Sea
– Black Sea
– Russia and the Baltic region
– India–Pakistan border area
– Iraq and Iran
– North and South Korea
– Vicinity of Beijing, China
While these regions report the greatest volume of interference and spoofing activity, the FAA notes that domestic incidents still occur within the United States. For instance, a 2022 event near Denver International Airport (DEN) disrupted numerous aircraft after an unauthorized transmitter emitted on GNSS frequencies, degrading navigation and air traffic control functions.
The guide emphasizes that both intentional and unintentional interference can compromise GNSS integrity. Faulty commercial transmitters, reradiated test signals from maintenance facilities, or malfunctioning avionics can all create localized disruptions. To mitigate risk, pilots and operators are urged to remain vigilant, apply the procedures outlined in the new document, and promptly report any anomalies or suspected interference. Reports should include affected equipment, the operational impact, and any follow-up maintenance or corrective actions performed.
The FAA continues to treat GNSS interference as a critical safety concern and has encouraged active reporting to strengthen data collection and improve situational awareness across the aviation community.
