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Broadcast (TWEB) locations, and telephone access
to the TWEB (TEL-TWEB) provide continuously
updated recorded weather information for short or
local flights. Separate paragraphs in this section give
additional information regarding these services.
REFERENCEAIM,
Telephone Information Briefing Service (TIBS), Paragraph 7-1-8.
AIM, Transcribed Weather Broadcast (TWEB) (Alaska Only),
Paragraph7-1-9.
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 48contiguous
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.
REFERENCEAIM,
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.
REFERENCEAIM,
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 readiness requirements are met before
experimental products mature to operational
application.
d. The FAA, in conjunction with the NWS,
established the Aviation Weather Technology
Transfer (AWTT) Board so that newly developed
aviation weather products meet regulatory
requirements and enhance safety. The AWTT is
charged with managing and accelerating the transfer
of these products into operational use. Members of
the AWTT Board include mid-level managers from
the FAA and NWS who are responsible for various
aspects of the development and use of aviation
AIM 2/14/08
7-1-4 Meteorology
weather products (e.g., aviation weather R & D,
transition of weather products from R & D to
operational use, etc.).
e. The AWTT is a management-review and
decision-making process that applies criteria to
weather products at various development stages
(decision stages, i.e., “D-stages”). The D-stages are
composed of the following:
1. (D1) Sponsorship of user needs.
2. (D2) R & D and controlled testing.
3. (D3) Experimental application.
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