For the latest changes and updates on the North Atlantic, including our most recent Guides and Charts, use our NAT reference page at

Update Feb 7, 2018: We screwed up the circle. NAT Tracks don’t all need CPDLC and ADS-C, just the ones from FL350-390. Circle admonished and corrected.

Confused and overwhelmed with the changes on the North Atlantic of late? Especially with PBCS, RCP240, RSP180, RLAT, RLong, and all that? Yep, us too.

So, we drew a circle. Tell us if this helps. Click on the circle to download the more detailed PDF.


Download the NAT Circle of Change 2018 PDF.

To help ease your NAT Headache further, these goodies will probably also be useful: