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12-7
190-01007-03 Rev. B
Garmin GTN 725/750 Pilot’s Guide
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Music
Utilities
System
Messages
Symbols
Appendix
Index
12.1.4 XM Weather Symbols and Product Age
The weather product symbols, the expiration time and the refresh rate are
shown in the following tables. The refresh rate represents the interval at which XM
Satellite Radio broadcasts 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 Data Link Receiver. Weather data is refreshed at intervals that are
defined and controlled by XM Satellite Radio and its data vendors.
Weather Product
Expiration
Time
(Minutes)
Refresh Rate
(Minutes)
NEXRAD (NEXRAD and Echo Top are Mutually
Exclusive)
30
5 (U.S.)
10 (Canada)
Echo Top (Cloud Top and Echo Top Mutually
Exclusive) (NEXRAD and Echo Top Mutually
Exclusive)
30
7.5
Cloud Top (Cloud Top and Echo Top Mutually
Exclusive)
60
15
XM Lightning
30
5
Cell Movement
30
1.25
SIGMETs / AIRMETs
60
12
METARs
90
12
City Forecast
90
12
WX Forecast
60
12
Freezing Levels
60
12
Winds Aloft
60
12
County Warnings
60
5
Cyclone Warnings
60
12
Icing Potential (Icing)
(SLD)
90
22
Pilot Weather Report (PIREP)
(Blue - Regular, Yellow - Urgent)
90
12
Air Report (AIREP)
90
12
Turbulence
180
12
Summary of Contents for GTN 750
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