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A Date With AIRAC

Maybe were too busy focusing on the forest and the trees that the dirt making up the foundation of the arbors is ignored. Or perhaps its the elephant in the room no one discusses. Instructors dont teach it because they dont understand the opaque system themselves-cant teach something you dont know. Whatever the cause, many pilots have a poor understanding of how aeronautical information travels through the system and how charts are updated.

Gemini Sparkle

Key Takeaways:

  • AIRAC (Aeronautical Information Regulation And Control) is an international standard established by ICAO Annex 15, ensuring participating countries publish aeronautical information changes on a common 28-day cycle.
  • Understanding the AIRAC "effective date" is crucial for instrument pilots, as it dictates when new procedures, changes, and legal requirements for charts and navigation databases become active.
  • Chart updates vary: those without an effective date incorporate minor changes (e.g., D-NOTAMs) and can be used immediately, while those with an effective date contain significant Part 97 procedural changes that are legally valid only from that specific AIRAC date.
  • Pilots must update their charts and navigation databases by the AIRAC effective date to ensure they are using current, legally compliant, and safety-critical aeronautical information, avoiding reliance on potentially expired NOTAMs.
See a mistake? Contact us.

Maybe we’re too busy focusing on the forest and the trees that the dirt making up the foundation of the arbors is ignored. Or perhaps it’s the elephant in the room no one discusses. Instructors don’t teach it because they don’t understand the opaque system themselves—can’t teach something you don’t know. Whatever the cause, many pilots have a poor understanding of how aeronautical information travels through the system and how charts are updated.

Why fend off paper cuts every few weeks or get the notice to update your data every time you fire up your electronic flight bag? Why are Jepps updated every two weeks while government charts update at four weeks? What about databases? Why do some charts have effective dates and other don’t?

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