When transferring route data between ForeFlight Mobile and Garmin GNS/GTN Navigator units via a FlightStream 210, differences in the nav databases can result in variations in how routes are displayed.
Key Translation Details
The following describes how route data is translated between ForeFlight Mobile and Garmin GNS/GTN Navigator units.
Airports and Waypoints
ForeFlight Mobile’s database includes more small airports than Garmin’s. If a waypoint or airport in the route is not recognized by Garmin, it will appear as "locked” indicating it is unknown to the Garmin database.
User Waypoints
User waypoints in ForeFlight Mobile are transmitted to Garmin as Lat/Long coordinate pairs. The ForeFlight user waypoint name will not be sent or displayed in Garmin units.
SID/STARs
SID/STARs sent from Garmin GNS/GTN units to ForeFlight Mobile are generally recognized. Some SID/STARs sent from ForeFlight Mobile to Garmin may be rejected because the Garmin database requires runway-specific details that ForeFlight’s database may not include.
Approaches
Approaches entered in a Garmin unit are typically accepted by ForeFlight Mobile, even though the databases do not match exactly.
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