Garmin G3X Touch Pilot's Manual page 213

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.
Data Link Weather Products can be displayed on the Map Page and individually on the
Weather (Wx) Page.
FiS-B
The supported FIS-B radios are designed to receive, process, and output traffic (ADS-B
air-to-air, and TIS-B traffic information), and weather (Flight Information Service-Broadcast
(FIS-B)) information to the G3X Touch system through an RS-232 serial connection or
Bluetooth connection. As a UAT receiver, the FIS-B radios can receive and, when connected
to the G3X Touch, display Flight Information Service-Broadcast (FIS-B) weather products as
well as traffic.
FIS-B is a subscription-free weather service that is broadcast by Ground Based Transceivers
(GBTs) over the 978 MHz UAT frequency band as part of the FAA's Next Generation Air
Transportation System (NextGen). To receive FIS-B weather information, the radio must
be within range and line-of-sight of an operating GBT. Reception may be affected by
altitude, terrain, and other factors. The FIS-B weather products include METARs, TAFs,
NEXRAD (Regional and CONUS (Combined)), AIRMETs, SIGMETs, PIREPs, and Winds and
Temperatures Aloft. Other products include NOTAMs and TFRs.
FIS-B Expiration Time
FIS-B weather broadcasts are updated regularly and may take approximately
ten minutes to transmit all available weather data. Therefore, weather data is not
immediately available. No pilot action is required to receive FIS-B weather information.
Weather product status can be viewed on the dedicated Weather Page,or the Data Link
Page from the Tools menu.
When a FIS-B weather product is active on a map, the age of the data is displayed
on the screen in the lower left corner. 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 broadcast at specific intervals (see broadcast interval in
the table below).
190-01754-00 Rev. L Garmin G3X Touch Pilot's Guide
Hazard Avoidance
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