What Is GPS Spoofing and how it disrupted 800+ flights in Delhi?
On November 7, 2025, Delhi’s IGI Airport experienced major disruption as GPS spoofing and a malfunction in the ATC system delayed over 800 flights. While the DGCA has launched an investigation, experts and a parliamentary panel are calling for urgent modernization of India’s outdated air traffic control systems.
On Friday, air travel across India faced major disruptions due to a technical fault in the Air Traffic Control (ATC) system at the Indira Gandhi International (IGI) Airport in New Delhi. The issue led to widespread flight delays and cancellations, affecting more than 800 flight operations and causing ripple effects in Indian airspace.
According to reports, the disturbance was linked to a series of GPS spoofing incidents that have occurred in recent days, adding to the chaos at the country’s busiest airport.
What is GPS Spoofing?
Cybersecurity experts define GPS spoofing as a cyberattack technique in which false signals are broadcast to manipulate the GPS receiver. This causes the receiver to display incorrect location data, misleading systems into believing they are in a completely different location.
As cybersecurity firm McAfee explains, such attacks can compromise the reliability of GPS-based data used in critical operations such as navigation, mapping and time synchronization. Over time, the practice has evolved into a significant security threat due to the availability of advanced equipment capable of generating spoofed GPS signals.
“These fake signals can cause aircraft navigation systems to misinterpret their exact location, leading to false alerts and potentially dangerous situations,” experts said.
Impact on Delhi Airport Operations
The Airports Authority of India (AAI) confirmed that the technical issue at Delhi Airport was resolved on Friday evening. However, it warned that it would take some time for normal operations to stabilize due to the high volume of flights waiting for clearance.
Complicating matters further, strong easterly winds forced multiple flights to change their runway approach, with planes landing from Dwarka side and taking off from Vasant Kunj. This change in pattern has led to greater airspace congestion and longer wait times for both arrival and departure.
Reports from The Hindu stated that many airlines operating in and around Delhi faced serious GPS spoofing incidents last week. These incorrect navigation signals reportedly caused erroneous readings, such as incorrect aircraft positioning and misleading terrain warnings.
The Directorate General of Civil Aviation (DGCA) has launched an official investigation into the matter to determine whether these fraudulent incidents are linked to the ATC outage on Friday.
Need for ATC System Modernization
Concerns over the aging infrastructure of India’s Air Traffic Control systems are not new. In a report published in August 2025, the Parliamentary Standing Committee on Transport highlighted the urgent need for a comprehensive modernization of ATC automation systems across the country.
The committee warned that outdated technology creates serious operational and safety problems, especially at congested airports such as Delhi and Mumbai. He called on authorities to undertake a time-bound upgrade to improve reliability, cybersecurity and capacity management in the airspace system.
While operations at IGI Airport are slowly returning to normal, the incident serves as a wake-up call for India’s aviation ecosystem. The combination of technical system failure and cyber threats such as GPS spoofing underscores the growing need for robust digital defenses and modernized infrastructure in critical sectors such as aviation.
