Notice to Airmen (NOTAM) — now officially called Notice to Air Missions — is an official alert issued to pilots
and aviation personnel regarding any change, hazard, or restriction in the airspace or at aerodromes that may affect
safe flight operations.
📌 Key Features
Issued by: National aviation authorities (in India: DGCA & AAI)
Purpose: To notify hazards, restrictions, or changes in air navigation
Who uses it: Pilots, airlines, air traffic controllers, defence aviation units
Mode: Online platforms, aviation weather systems, flight planning tools
Nature: Time-sensitive, operationally critical
Why NOTAM is Important ?
- Helps pilots plan safe routes
- Prevents accidents by alerting hazards in real time
- Used especially during military exercises, VIP movements, disasters, or sudden changes in navigation equipment
🔔 Typical Reasons for Issuing a NOTAM
- Closure of runways or taxiways
- Airspace restrictions due to military exercises (e.g., Ex Trishul)
- VIP movements / Head of State flights
- Unserviceable navigation or landing aids
- Tall obstacles / cranes near airfields
- Air-shows, parachuting, or gliding activities
- Weather-related hazards (e.g., ash clouds)
- UPSC Prelims Angle
Q. What is a NOTAM?
a) A satellite navigation system
b) A weather forecasting tool
c) An official notification informing airspace users about time-bound hazards or restrictions
d) A radar-based surveillance network
✅ Correct Answer: (c)
UPSC Mains (Short Note – 120 words)
NOTAMs (Notice to Air Missions) are time-sensitive alerts issued by national aviation authorities to inform pilots and aviation personnel about hazards or changes in aerodrome or airspace conditions. They ensure flight safety by providing advance warning of military exercises, runway closures, VIP movements, unserviceable navigation equipment, or temporary obstacles. NOTAMs play a crucial role in national defence coordination as well, since large-scale military drills often require temporary airspace restrictions. They are disseminated through the fastest available means and accessed via digital flight planning tools. Failure to review NOTAMs increases aviation risk, making them a critical tool in both civilian and defence aviation safety frameworks.