Security
India Issues Addendum to GNSS Spoofing Reporting SOP
DGCA clarifies pilot steps for reporting, immediate notification requirements
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India’s Directorate General of Civil Aviation (DGCA) has published an addendum clarifying reporting procedures for suspected GNSS spoofing put in place last month following a week of disruptions consistent with GPS interference around Delhi. 

According to OpsGroup contributor Chris Shieff, the disruptions produced false EGPWS alerts, position errors, and incorrect altitude indications that crews described as consistent with spoofing. The interference affected hundreds of flights and briefly drove ADS-B integrity in the Delhi terminal area to zero, leaving controllers unable to rely on GPS-based surveillance. The timing also coincided with the temporary withdrawal of ILS procedures for Runway 10/28 at Indira Gandhi International Airport (VIDP), increasing reliance on RNAV guidance.