India’s civil aviation regulator has asked airlines, pilots and air traffic controllers (ATCs) operating in and around Delhi’s Indira Gandhi International (IGI) Airport to report GPS (Global Positioning System) spoofing incidents within 10 minutes, according to an Economic Times article.
The Directorate General of Civil Aviation (DGCA) issued this instruction in light of recent GPS-spoofing attacks aimed at IGI Airport. Notably, this airport is the busiest in India—handling over 1,500 flight movements daily.
To explain, the GPS-spoofing attacks in the national capital in early November 2025 disrupted over 800 flights, and consequently India’s National Security Advisor (NSA) office has launched a formal investigation into the matter.
“Any pilot, ATC controller, or technical unit detecting abnormal GPS behaviour (e.g., position anomalies, navigation errors, loss of Global Navigation Satellite System (GNSS) signal integrity, or spoofed location data) shall initiate real-time reporting (within 10 minutes of occurrence),” the DGCA said in a three-page circular released on November 10.
What does the DGCA circular say?
The DGCA says that the initial reports of such incidents should contain details such as:
- date and time of occurrence
- aircraft type and registration
- airline name
- flight route
- coordinates of occurrence or area affected
Furthermore, the civil aviation watchdog said that reports must mention the type of interference: whether it was “jamming / spoofing / signal loss / integrity error,” as well as the aircraft equipment affected by such interference.
Airline operators, ATCs and pilots may include additional supporting details, such as:
- preservation of system logs
- screenshots or images of the Flight Management System (FMS)
- records of effects on connected systems and platforms
Importantly, the DGCA has instructed all aircraft operators, flight crew and Airports Authority of India (AAI), including ATC and Communication, Navigation, Surveillance (CNS) units, operating in and around the Delhi airport to follow the instructions in its circular.
What happened in and around the Delhi airport?
Airline pilots approaching Delhi between November 1 and November 7, 2025, reported increasingly severe navigation anomalies. Aircraft systems displayed incorrect terrain warnings, false positional data, and misleading altitude information, all signs of GPS spoofing.
Notably, this navigational disruption peaked around November 5–7. To explain, the Navigation Integrity Category value, which measures GPS accuracy and normally sits at eight, dropped to zero.
Flight-tracking data from Flightradar24 showed that Delhi experienced the second-highest air traffic disruptions globally during the evening of November 6, with pilots forced to rely on manual ATC guidance through some of the most congested airspace in the world.
“We were getting readings that suggested we were in a…
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