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Notices to Airmen (NOTAMs)

Notices to Airmen (NOTAMs)

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A NOTAM is a notice containing information essential to personnel concerned with flight operations but not known far enough in advance to be publicized by other means. It states the abnormal status of a component of the National Airspace System (NAS) – not the normal status.

  • Every user of the NAS is affected by NOTAMs because they indicate the real-time and abnormal status of a component of the NAS.
  • NOTAMs concern the establishment, condition, or change of any facility, service, procedure or hazard in the NAS.
  • NOTAMs have a unique language using special contractions to make communication more efficient.

The NOTAM Governance and Operations group updated two new NOTAM primers for airports (PDF) and pilots (PDF) that identify common issues and best practices. For instance, did you know that you should always check 25 nautical miles to either side of your full route of flight to ensure relevant NAVAID NOTAMs are displayed? Review the primers for NOTAM components, common issues, best practices, FAQs and more.

ICAO Compliance

  • The FAA is working to make U.S. NOTAMs comply with ICAO standards. In December 2017, FAA met with Airlines for America to develop a compliance strategy, resulting in an agreement to form an industry-FAA coalition.
  • U.S. NOTAM Governance and Operations teams have begun site visits to airline operations centers and meeting with dispatchers to gain insight on NOTAM issues (MS PowerPoint).


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