Garmin G500 Pilot's Manual page 192

WARNING: Do not use the indicated data link weather product age to
determine the age of the weather information shown by the data link
weather product. Due to time delays inherent in gathering and processing
weather data for data link transmission, the weather information shown by
the data link weather product may be significantly older than the indicated
weather product age.
Symbol
NEXRAD (NEXRAD and Echo Top
are Mutually Exclusive)
Echo Top (Cloud Top and Echo Top
Mutually Exclusive) (NEXRAD and
Echo Top Mutually Exclusive)
Cloud Top (Cloud Top and Echo
Top Mutually Exclusive)
XM Lightning
Cell Movement
SIGMETs / AIRMETs
METARs
City Forecast
Surface Analysis
Freezing Levels
Winds Aloft
County Warnings
Cyclone Warnings
Table 4-15 Weather Product Symbols and Data Timing
4-34
Weather Product
Garmin G500 Pilot's Guide
Expiration Broadcast Rate
Time (Minutes)
(Minutes)
30
30
60
30
30
60
90
90
60
120
90
60
60
190-01102-02 Rev. E
5
7.5
15
5
1.25
12
12
12
12
12
12
5
12