What does RDR (Amber) flag mean on my Garmin GMX 200?
- FFrank MatthewsSep 10, 2025
The RDR (Amber) flag on your Garmin GPS suggests a problem with the Radar unit. Ensure that the Radar unit is installed and functional.





What does RDR (Amber) flag mean on my Garmin GMX 200?
The RDR (Amber) flag on your Garmin GPS suggests a problem with the Radar unit. Ensure that the Radar unit is installed and functional.
What to do if my Garmin GPS unit does not power up and the screen is blank?
If your Garmin GPS unit's screen is blank and it won't power up, first, check the power wiring to ensure it's correctly connected to the GMX 200 and that the circuit breaker is closed. Next, verify that the unit isn't in manual intensity control mode with the intensity turned all the way down. Finally, make sure the data card is fully inserted into the front bezel, sitting flush with the ejector button.
What to do if my Garmin GMX 200 GPS unit fails during start up test?
If your Garmin GPS unit fails during the start-up test, ensure that the data card is fully inserted. If the issue persists, it may indicate a system failure, in which case you should contact your dealer or the factory.
Why is there no traffic display on my Garmin GPS?
If you're not seeing a traffic display on your Garmin GPS, it could be due to a few reasons. First, ensure that the ADS-B system is installed and configured. If you have an ADS-B system, check the antennas and other components for proper operation. It's also recommended to have a dealer/installer check for proper GMX 200 setup.
What does it mean when my Garmin GMX 200 shows a POS data flag?
A POS data flag on your Garmin GPS indicates a potential issue with position data. Check the antenna and wiring. Ensure that a waypoint is selected as the current destination and a Nav flag is not shown. Verify that the serial data output is configured properly. Have a dealer/installer check for any interference sources, and also check for proper GMX 200 setup.
What does it mean when my Garmin GMX 200 GPS shows an ADSB flag?
An ADSB flag on your Garmin GPS means the GDL 90 is reporting that its internal GPS is not reporting a position or is reporting an invalid position. Ensure the GDL 90 is installed and functional, and that the GDL 90 GPS antenna has a clear view of the sky to receive GPS signals.
What to do if power-on self-test (POST) does not complete successfully on Garmin GMX 200?
If the power-on self-test (POST) does not complete successfully on your Garmin GPS, the data card might be missing or not properly installed. Ensure that the data card is fully inserted into the front bezel so that it is flush with the ejector button.
What does LINK flag mean on my Garmin GPS?
The LINK flag on your Garmin GPS indicates a problem with the FIS unit. Ensure that the FIS unit is installed and functional.
What does TAS flag mean on my Garmin GPS?
The TAS flag on your Garmin GPS indicates an issue with the TAS unit. Ensure that the TAS unit is installed and functional.
What does TER (Terrain) flag mean on my Garmin GMX 200 GPS?
The TER (Terrain) flag on your Garmin GPS indicates a problem with the altitude input. It is recommended to have a dealer/installer check for proper altitude input.
How to view and manage system messages, alerts, and error codes.
Guide to customizing and displaying map features and overlays.
Using the IFR en route map and chart features for navigation.
Using the VFR sectional map and chart features for navigation.
How to view and interpret traffic information from sensors.
Using ADS-B for traffic awareness and visual acquisition.
Displaying and interpreting terrain elevation data relative to aircraft altitude.
Operating and interpreting weather radar data for storm avoidance.
Guidance on identifying and resolving operational problems.
How to view and manage system messages, alerts, and error codes.
Guide to customizing and displaying map features and overlays.
Using the IFR en route map and chart features for navigation.
Using the VFR sectional map and chart features for navigation.
How to view and interpret traffic information from sensors.
Using ADS-B for traffic awareness and visual acquisition.
Displaying and interpreting terrain elevation data relative to aircraft altitude.
Operating and interpreting weather radar data for storm avoidance.
Guidance on identifying and resolving operational problems.