L3 Aviation Products Lynx NGT-9000+ Pilot's Manual page 21

Lynx NGT-9000 Description
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Flight Information Service - Broadcast (FIS-B)
FIS−B is a ground broadcast service provided through the ADS−B
Services network over the 978 MHz UAT data link. The FAA FIS−B
system provides pilots and flight crews of properly equipped aircraft
with a cockpit display of certain aviation weather and aeronautical
information. FIS−B service availability is installed across the NAS and
is currently available within certain regions.
The weather products provided by FIS−B are for information only.
Therefore, these products do not meet the safety and regulatory
requirements of official weather products. The weather products
displayed on FIS−B should not be used as primary weather products,
i.e., aviation weather to meet operational and safety requirements.
Official weather products (primary products) can be obtained from
a variety of sources including ATC, FSSs, and, if applicable, AOCC
VHF/HF voice, which can transmit aviation weather, NOTAMS, and
other operational aeronautical information to aircraft in flight.
FIS−B augments the traditional ATC/FSS/ AOCC services by providing
additional information and, for some products, offers the advantage
of being displayed graphically. By using FIS−B for orientation and
information, the usefulness of information received from official sources
may be enhanced, but the user should be alert and understand any
limitations associated with individual products. FIS−B provides the
initial basic products listed in Table 1-2 at no charge to the user. FIS−B
reception is line−of−sight within the service volume of the ground
infrastructure.
Pilot's Guide 1-11