AeroVigil
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NOTAM

7 posts on NOTAM.

BlogJul 27, 2026

How to Read a NOTAM: A Step-by-Step Walkthrough

To read a NOTAM, decode it field by field: the Q-line says what changed and where, item A names the location, items B and C set the start and end times in UTC, and item E states the change in plain language. A NOTAM is a formatted alert about a temporary change to the aviation system.

NOTAMAirspace RiskOverflight Risk7 min read
BlogJul 13, 2026

Prohibited vs Restricted vs Danger Areas Explained

A prohibited area bans flight outright, a restricted area allows flight only under specified conditions, and a danger area only warns of a hazard without legally forbidding entry. The three look alike on a chart but carry very different legal weight for a flight crew.

Airspace RiskNOTAM6 min read
BlogJul 7, 2026

Tehran FIR on High Alert: Sustained Military Air Activity and Civilian Overflight Risk in Iranian Airspace

Multiple military aircraft from several nations have been detected transiting Tehran FIR in recent days, coinciding with an active Iran-Israel armed conflict indicator. Operators with routes through Iranian airspace should reassess exposure urgently.

Conflict ZoneIranMiddle East5 min read
BlogJun 15, 2026

Understanding NOTAMs & Airspace Restrictions

A NOTAM is how the aviation system tells crews what changed since the chart was printed — a runway closure, a new restricted area, a GPS-jamming warning. This guide explains what NOTAMs are, how the ICAO format is structured, and how prohibited, restricted and danger areas differ.

Airspace RiskNOTAMOverflight Risk10 min read
BlogJun 4, 2026

GNSS Vulnerabilities at Major U.S. Hubs: LAX and JFK GPS Degradation and NOTAM-Driven Navigation Constraints

NOTAMs at LAX and JFK signal GPS interference and aging DME outages that narrow approach options and expose a critical gap: RNAV-equipped aircraft lose their primary navigation source with no DME fallback if GPS is jammed or spoofed.

Airport SecurityGNSS InterferenceNOTAM7 min read
BlogJun 4, 2026

Middle East and North Africa Overflight Risk: GNSS Jamming, Military Activity, and Airspace Closures in 2026

Sustained GNSS jamming below FL320, SAM activity over Yemen, and near-zero ADS-B traffic across six MENA FIRs signal a materially elevated threat environment in 2026. Operators must treat active NOTAMs as hard avoidance zones and validate inertial navigation redundancy before any regional operation.

Airspace RiskConflict ZoneGNSS Interference5 min read
BlogJun 4, 2026

Military Aircraft Activity Surge in Ukraine Airspace Despite Ongoing Conflict Risk

ADS-B surveillance has detected multiple military transport and logistics aircraft inside Ukraine's Kyiv FIR, confirming the airspace remains operationally active and contested. Civil overflight is not viable for standard commercial operations without government coordination, dedicated corridor approval, and…

ADS-BAirspace RiskConflict Zone3 min read