India has issued a Notice to Air Missions (NOTAM) alerting aircraft of possible GPS interference or signal loss along air traffic routes within its airspace near Mumbai, according to defence analyst Damien Symon.
The NOTAM, which is valid from November 13 to 17, 2025, cautions pilots and airlines operating in the region to stay alert to potential disruptions in satellite-based navigation systems. The development was confirmed by Damien Symon, a geo-intelligence researcher at the AI analysis firm The Intel Lab, in a post on X.
Symon wrote: “India issues a NOTAM warning aircraft of GPS interference/loss around air traffic routes within its airspace near Mumbai. This follows reports of similar interference observed around New Delhi. Valid: 13-17 November 2025.”
The alert comes just two days after DGCA on November 11 asked airlines, pilots and air traffic controllers to report GPS spoofing incidents within 10 minutes of the occurrences. The DGCA order came amid the recent incidents at the Delhi airport.
In recent days, incidents of GPS spoofing and interference have been reported in and around the national capital’s Indira Gandhi International Airport (IGIA), the country’s busiest airport that handles over 1,500 flight movements daily.
On November 6, the airport’s central Air Traffic Control (ATC) system faced a technical issue, which left hundreds of passengers stranded at the Indira Gandhi International (IGI) Airport. The technical problem with the Automatic Message Switching System (AMSS), which supports the air traffic control’s flight planning process, continued for over 15 hours. The issue led to a delay of over 800 flights, and nearly 100 flights were cancelled.
GPS spoofing refers to sending false satellite signals to trick a navigation system into showing the wrong position, speed or time, which can trigger errors and pose safety risks. It is different from jamming, as jamming only floods the spectrum on which GPS satellites share a signal.
The DGCA said in its three-page circular: “Any pilot, ATC controller, or technical unit detecting abnormal GPS behaviour (eg, position anomalies, navigation errors, loss of GNSS signal integrity, or spoofed location data) shall initiate real-time reporting (within 10 minutes of occurrence).”
🚨 BIG! India issues a NOTAM warning of GPS interference/loss on key air routes near Mumbai, after similar disruptions near New Delhi — valid 13–17 November 2025. pic.twitter.com/Qg1HgI6IsA
— Megh Updates 🚨™ (@MeghUpdates) November 13, 2025
