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AIM, Telephone Information Briefing Service (TIBS), Paragraph 7−1−8.
AIM, Transcribed Weather Broadcast (TWEB), Paragraph 7−1−9.
2. Weather and aeronautical information are
also available from numerous private industry
sources on an individual or contract pay basis.
Information on how to obtain this service should be
available from local pilot organizations.
3. The Direct User Access Terminal System
(DUATS) can be accessed by pilots with a
current medical certificate toll-free in the 48
contiguous States via personal computer. Pilots can
receive alpha-numeric preflight weather data and file
domestic VFR and IFR flight plans. The following
are the contract DUATS vendors:
GTE Federal Systems
15000 Conference Center Drive
Chantilly, VA 22021−3808
Computer Modem Access Number: For filing flight
plans and obtaining weather briefings:
(800) 767−9989
For customer service: (800) 345−3828
Data Transformation Corporation
108−D Greentree Road
Turnersville, NJ 08012
Computer Modem Access Number: For filing flight
plans and obtaining weather briefings:
(800) 245−3828
For customer service: (800) 243−3828
d. Inflight weather information is available from
any FSS within radio range. The common frequency
for all AFSSs is 122.2. Discrete frequencies for
individual stations are listed in the A/FD.
1. Information on In-Flight Weather broadcasts.
REFERENCE−
AIM, Inflight Weather Broadcasts, Paragraph 7−1−10.
2. En Route Flight Advisory Service (EFAS) is
provided to serve the nonroutine weather needs of
pilots in flight.
REFERENCE−
AIM, En Route Flight Advisory Service (EFAS), Paragraph 7−1−5, gives
details on this service.
7−1−3. Use of Aviation Weather Products
a. Air carriers and operators certificated under the
provisions of 14 CFR Part 119 are required to use the
aeronautical weather information systems defined in
the Operations Specifications issued to that certificate
holder by the FAA. These systems may utilize
basic FAA/National Weather Service (NWS) weather
services, contractor− or operator−proprietary weather
services and/or Enhanced Weather Information
System (EWINS) when approved in the Operations
Specifications. As an integral part of this system
approval, the procedures for collecting, producing
and disseminating aeronautical weather information,
as well as the crew member and dispatcher training to
support the use of system weather products, must be
accepted or approved.
b. Operators not certificated under the provisions
of 14 CFR Part 119 are encouraged to use FAA/NWS
products through Flight Service Stations, Direct User
Access Terminal System (DUATS), and/or Flight
Information Services Data Link (FISDL).
c. The suite of available aviation weather product
types is expanding, with the development of new
sensor systems, algorithms and forecast models. The
FAA and NWS, supported by the National Center for
Atmospheric Research and the Forecast Systems
Laboratory, develop and implement new aviation
weather product types through a comprehensive
process known as the Aviation Weather Technology
Transfer process. This process ensures that user
needs, and technical and operational readiness
requirements are met as experimental product types
mature to operational application.
AIM 8/5/04
7−1−4 Meteorology
d. 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 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
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