โ๏ธ New Aeronautical Information Circular (AIC) Detected
AIC: AIC 005/2026
Published: 2026-04-02
Type: Operational Guidance
FIR: NATIONWIDE (Nationwide)
๐ง What Changed (Summary)
This AIC consolidates existing guidance for operations in Canadian Northern Domestic Airspace (NDA), emphasizing operational considerations where magnetic compass/variation issues and meridian convergence can affect navigation. It does not introduce new operational procedures. The material is intended to be republished in AIP CANADA and the TC AIM in fall 2026.
- NDA operations differ due to diminished horizontal magnetic field near the magnetic north pole, which can make magnetic compass indications erratic and magnetic variation large/rapidly changing.
- Highlights that meridian convergence north of 70ยฐN (rapidly north of 80ยฐN) can require frequent heading changes to maintain great-circle tracks.
- Reinforces the use/consideration of degrees TRUE and/or TRUE TRACK for navigation in NDA where magnetic azimuth may be problematic.
- Content is compiled from existing references (e.g., Designated Airspace Handbook, AIP CANADA, TC AIM, NAV CANADA phraseology guides).
โ๏ธ General Aviation Impact (Highlighted)
Airspace / Procedures:
- No new NDA procedures are being implemented by this AIC; it is a consolidation/awareness document for planning and operations in NDA.
Operational Notes:
- Expect navigation and heading management challenges in NDA due to unreliable magnetic references and significant variation changes; plan for TRUE-based navigation practices where applicable.
- When operating at high latitudes, anticipate frequent heading adjustments to stay on track due to meridian convergence.
VFR Impact:
- VFR operators in NDA should be prepared for reduced reliability of magnetic compass navigation and plan routes/techniques accordingly, particularly at higher latitudes.
๐ Official Source
๐๏ธ This summary is generated using automated analysis and may omit important details.
It does not replace the official NAV CANADA AIC. Pilots must review the original notice in full prior to flight.