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4. (D4) Operational application.
f. Weather products maturing into the D3
experimental stage of the AWTT process are often
made available to the public on the Aviation Weather
Center's Experimental Aviation Digital Data Service
(ADDS) website at: http://weather.aero/. The intent
is to allow public access to this information in order
to obtain feedback for product development and
improvement. However, it is important to note that
weather products displayed on this site are
experimental, and although they may appear to be
fully operational products, they are subject to change
without notification and may not be used for any
flight related decisions. At the D4 stage, the FAA
approves a weather product for operational use by
end users (with restrictions, if necessary), and the
product is made available to the public via long-line
circuit, satellite, and/or other means of
communication.
g. Pilots and operators should be aware that
weather services provided by entities other than FAA,
NWS or their contractors (such as the DUATS and
FISDL providers) may not meet FAA/NWS quality
control standards. Hence, operators and pilots
contemplating using such services should request
and/or review an appropriate description of services
and provider disclosure. This should include, but is
not limited to, the type of weather product (e.g.,
current weather or forecast weather), the currency of
the product (i.e., product issue and valid times), and
the relevance of the product. Pilots and operators
should be cautious when using unfamiliar products,
or products not supported by FAA/NWS technical
specifications.
NOTEWhen
in doubt, consult with a FAA Flight Service Station
Specialist.
h. In addition, pilots and operators should be
aware there are weather services and products
available from government organizations beyond the
scope of the AWTT process mentioned earlier in this
section. For example, governmental agencies such as
the NWS, the Aviation Weather Center (AWC), and
the National Center for Atmospheric Research
(NCAR) display weather “model data” and
“experimental” products which require training
and/or expertise to properly interpret and use. These
products are developmental prototypes that are
subject to ongoing research and can change without
notice. Therefore, some data on display by
government organizations, or government data on
display by independent organizations may be
unsuitable for flight planning purposes. Operators
and pilots contemplating using such services should
request and/or review an appropriate description of
services and provider disclosure. This should include,
but is not limited to, the type of weather product (e.g.,
current weather or forecast weather), the currency of
the product (i.e., product issue and valid times), and
the relevance of the product. Pilots and operators
should be cautious when using unfamiliar weather
products.
NOTEWhen
in doubt, consult with a FAA Flight Service Station
Specialist.
i. The development of new weather products
coupled with increased access to these products via
the public Internet, created confusion within the
aviation community regarding the relationship
between regulatory requirements and new weather
products. Consequently, FAA differentiates between
those weather products that may be utilized to comply
with regulatory requirements and those that may only
be used to improve situational awareness. To clarify
the proper use of aviation weather products to meet
the requirements of 14 CFR, FAA defines weather
products as follows:
1. Primary Weather Product. An aviation
weather product that meets all the regulatory
requirements and safety needs for use in making
flight related, aviation weather decisions.
2. Supplementary Weather Product. An
aviation weather product that may be used for
enhanced situational awareness. If utilized, a
2/14/08 AIM
Meteorology 7-1-5
supplementary weather product must only be used in
conjunction with one or more primary weather
product. In addition, the FAA may further restrict the
use of supplementary aviation weather products
through limitations described in the product label.
NOTEAn
aviation weather product produced by the Federal
Government and managed by the AWTT is classified a
primary weather product unless designated a
supplementary weather product by the FAA.
j. In developing the definitions of primary and
supplementary weather products, it is not the intent of
　
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