Garmin G1000 NXi Pilot’s Guide for the Cessna NAV III
190-02177-02 Rev. A
SY
STEM
O
VER
VIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO P
ANEL
& CNS
FLIGHT
MANA
GEMENT
HAZARD
AV
OID
ANCE
AFCS
ADDITIONAL FEA
TURES
APPENDICES
INDEX
250
HAZARD AVOIDANCE
6.1 DATA LINK WEATHER
WARNING:
Do not use data link weather information for maneuvering in, near, or around areas of
hazardous weather. Information contained within data link weather products may not accurately depict
current weather conditions.
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 older than the indicated weather product age.
The Data Link Weather feature enables the system to receive weather information from a variety of weather
sources, depending on the equipment installed in the aircraft. These sources may include SiriusXM Weather,
Garmin Connext Weather, and Flight Information Services-Broadcast (FIS-B) Weather. For each source, a ground-
based system processes the weather information collected from a network of sensors and weather data providers.
The SiriusXM Weather service, available with the optional Garmin GDL 69A or GDL 69 SXM SiriusXM Datalink
Receiver and an active service subscription, updates its weather data periodically and automatically, and transmits
this information to the aircraft’s receiver via satellite on the S-Band frequency. This service provides continuous
reception capabilities at any altitude throughout North America.
The FIS-B Weather service, available when equipped with a capable transponder or data link receiver which
can receive 978 MHz Universal Access Transceiver (UAT) data, delivers subscription-free weather information
periodically and automatically to the aircraft. FIS-B uses a network of FAA-operated Ground-Based Transceivers
(GBTs) to transmit the information to the aircraft’s receiver. Reception is limited to line-of-sight, and is available
below 24,000 feet MSL in the United States. FIS-B broadcasts provide weather data in a repeating cycle which
may take approximately ten minutes to transmit all available weather data. Therefore, not all weather data may
be present immediately upon initial FIS-B signal acquisition. FIS-B is a component of the Automatic Dependent
Surveillance (ADS-B) system, which offers both weather and traffic data; refer to the ADS-B Traffic discussion later
in this section for a more detailed discussion of the ADS-B system and its capabilities.
The Garmin Connext Weather service, available when equipped with the optional Garmin GSR 56 Iridium
Transceiver and an active service subscription, provides data link weather information to the aircraft after the pilot
defines a geographic area and subsequently selects a manual or automatically recurring Connext Data Request.
The transceiver then contacts the Garmin Connext Weather service using the Iridium Satellite telephone system
and retrieves the weather data for the specified area. The Garmin Connext Weather service offers worldwide
weather coverage, but the availability of individual weather products, such as radar precipitation, varies by region.
NOTE:
To check the availability of Garmin Connext weather products offered in a particular region, visit
flygarmin.com.
