Garmin GMX 200 Pilots Guide - Page 65
UAT Flight Information Service FIS, Function
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Detailed Operation UAT - FIS UAT Flight Information Service (FIS) Function The FIS Function is a graphic weather display capable of displaying graphical weather information on UAT equipped installations. Graphical data is overlaid on the map indicating the rainfall detected by ground based radar for a specific area. The colors indicating increasing levels of rainfall progresses from light green for light rainfall to magenta for heavy rainfall. Review the Limitations section in the front of this guide for the limitations that apply to the FIS data. Rainfall data is color coded as follows: Brown/Blue (transparent color) Light Green Dark Green Yellow Amber Red Magenta Cyan Zero rainfall Light rainfall Heavy rainfall No rainfall data available A cyan checkerboard pattern indicates that no data is available for that area, and rainfall in that area is unknown. When weather data is received, the airborne system will display that data for 20 minutes. If no new data has been received for a given area, the rainfall will be removed after 20 minutes and the area will revert back to the cyan checkerboard pattern. The FIS Function is based on a ground-to-air data link and requires that the appropriate ground systems are broadcasting weather data and the aircraft is within reception range of the Ground Broadcast Transceiver (GBT). UAT FIS Graphic Weather Info with GDL 90 If any weather data has been received in the previous two minutes, the "Service" indicator will be displayed in the lower right corner of the screen. This indicator shows if the aircraft is currently within reception coverage of a ground station with weather broadcast capabilities. The ground system determines the weather coverage area and extent of data that is transmitted by each ground station. The GMX 200 can display weather from multiple sources. 190-00607-02 Rev C 53