Garmin and ForeFlight Looking into ADS-B Challenges

Firmware ‘compatibility issue’ is being blamed for recent traffic display interruptions.

Meg Godlewski

Wednesday, August 09, 2023 at 05:47 PM ET

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ForeFlight and Garmin are presently working together to fix the issue.

Key Takeaways:

ForeFlight Mobile users may experience interrupted or disabled ADS-B traffic display due to a compatibility issue with Garmin GNX 375 GPS navigators running firmware version 3.13 or later.
This problem specifically affects traffic display in ForeFlight Mobile when connected to the GNX 375, especially in high-traffic environments, while traffic display on the GNX itself or Garmin Pilot remains unaffected.
Garmin and ForeFlight are collaborating on a solution, with a necessary firmware update for the GNX 375 expected to be available in September 2023.

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The aircraft passed off our right— not terribly close, as we saw it and avoided it with ease. But we had a mystery: Why didn’t the ADS-B give us an announcement?

The answer came this week in the form of an email from ForeFlight that stated “the ForeFlight and Garmin teams identifying ‘a compatibility issue’ between ForeFlight and recent firmware versions (v3.13 and later) of Garmin’s GNX 375 GPS navigator and ADS-B In/Out transponder.” According to the email, “the issue can temporarily interrupt or disable the display of ADS-B traffic in ForeFlight Mobile while connected to this device.”