Skip navigation links
Unsupported Browser Detected – For best results, please update your browser.

Aviation Alerts and Advisories

Service Alert 1761: GPS Position Accuracy


Garmin aera 660 products with main software 3.09 and earlier and D2 Bravo with GPS software versions 3.09 (and earlier) are affected.

To check D2 Bravo GPS software version go to the About page (Settings->System->About) and scroll down to display the GPS software.

To check aera 660 main software version:

  1. From the Main Menu, touch Tools > Downloads.
  2. Touch Menu > Software Downloads.


In some situations, a GPS position error of up to 20km may occur.


If a GPS position error is observed in flight, power off the device and power on again. Once on the ground connect the device to a wifi signal and download the latest unit software. For instructions on loading the latest software refer to the Garmin aera 660 Pilot’s Guide (190-02017-20) and/or the D2 Owner’s manual (190-01674-00). Both manuals can be found on


This issue has been fixed in D2 Bravo GPS software version 3.10 and aera 660 GPS software version 3.10.


Garmin aera 660 GPS software version 3.10 is contained in aera 660 main software version 3.10.

Service Alert 1761A