Garmin G1000 Diamond DA42NG Pilot's Manual page 357

When a FIS-B weather product is active on a map, the age of the data is displayed on the screen to the right
of the product symbol (Figure 6-94). The age of the product is based on the time difference between when
the data was assembled on the ground and the current GPS time. Weather products are refreshed at specific
intervals (defined in the Refresh Rate column in Table 6-10).
If for any reason, a weather product is not refreshed within the Expiration Time intervals (see Table 6-10),
the data is considered expired and is removed from the display. This ensures that the displayed data is consistent
with FIS-B broadcast data. If more than half of the expiration time has elapsed, the color of the product age
displayed changes to yellow. The system displays dashes instead of a product age when a product has expired.
If a weather product is not available or has not been received, the system displays 'N/A' instead of a product age.
The system displays a 'TFR N/A' annunciation in the upper-left portion of map pages to indicate Temporary
Flight Restriction (TFR) data is not available with FIS-B weather from the GDL 90.
Table 6-10 shows the FIS-B weather product symbols, the expiration time and the refresh rate. The refresh
rate represents the interval at which FIS-B GBTs broadcast new signals that may or may not contain new
weather data. It does not represent the rate at which weather data is updated or new content is received by
the GDL 90.
190-00962-02 Rev. A
Figure 6-94 Weather Data Link (FIS-B) Page
Garmin G1000 Pilot's Guide for the Diamond DA42NG
HAZARD AVOIDANCE
Weather Product Symbol
Weather
Product
Data Age in
Minutes
343