Archive · 14 Nov 2025
India Issues GPS Interference Alert Near Mumbai for Aircraft Navigation
Imagine airplanes use a special invisible line from satellites to know exactly where they are in the sky, like a super-powered map.
Sometimes, this invisible line can get a bit wobbly or even disappear, making it hard for planes to know their precise location.
India has sent out a special message to pilots flying near Mumbai to be extra careful between November 13th and 17th because their GPS might not work perfectly.
This is happening again because similar problems were noticed before, even near another city called New Delhi.
One of these past warnings happened when India was doing a big military exercise.
These special messages, called NOTAMs, are like safety warnings for pilots.
They tell them if there's anything unusual or potentially dangerous in the sky so they can fly safely.
India issued a Notice to Airmen (NOTAM) on November 13, warning of potential GPS signal interference or loss near Mumbai.
The current alert is valid from November 13 to 17 and follows a previous NOTAM from October 30 to November 10.
Defence analyst Damien Symon highlighted the NOTAM, noting similar interference reports previously observed around New Delhi.
The earlier NOTAM period coincided with India's 'Exercise Trishul', a large tri-services military drill.
NOTAMs are essential messages for pilots and airlines about conditions or hazards affecting flight operations and safety.
- Who
- India (Aviation authorities and defence analyst Damien Symon)
- What
- A Notice to Airmen (NOTAM) warning of potential GPS interference or signal loss for aircraft.
- When
- November 13-17 (current alert); October 30-November 10 (previous alert).
- Where
- Airspace near Mumbai, India; similar interference reported near New Delhi.
- Why
- To alert pilots and airlines to potential navigation issues and ensure flight safety, potentially linked to military drills or other activities causing interference.
Official Advisory and Safety Measures
Expert Observation and Context
Purpose of NOTAM
Official Advisory and Safety Measures
A NOTAM is a critical message for pilots and airlines to inform them about potential hazards or changes in aeronautical facilities, services, procedures, or risks, ensuring flight safety.
Expert Observation and Context
Defence analyst Damien Symon highlights the NOTAM as a warning to aircraft about potential GPS interference/loss near Mumbai, linking it to previous similar reports around New Delhi.
Timing and Potential Causes
Official Advisory and Safety Measures
The current NOTAM is valid from November 13 to 17. A previous NOTAM with similar warnings was issued from October 30 to November 10, coinciding with India's Exercise Trishul, a large military drill.
Expert Observation and Context
Symon notes the current NOTAM follows previous reports of GPS interference around New Delhi and suggests the prior NOTAM might be linked to military drills, as indicated by the airspace restrictions and the location of Exercise Trishul near the Pakistan border.
- Alert Type
- Notice to Airmen (NOTAM)
- Issuing Authority
- India
- Affected Area
- Airspace near Mumbai
- Validity Period
- November 13-17 (year unspecified)
- Reported Issue
- Potential GPS interference or signal loss
- Previous NOTAM Period
- October 30 - November 10 (year unspecified)
- Linked Event (Previous NOTAM)
- Exercise Trishul, a tri-services military drill
