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updated recorded weather information for short or
local flights. Separate paragraphs in this section give
additional information regarding these services.
3.5.3.2 Weather and aeronautical information is 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.
3.5.3.3 The Direct User Access System (DUATS)
can be accessed by U.S. certified pilots with a current
medical certificate toll-free 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 Information Federal Systems
15000 Conference Center Drive
Chantilly, VA 22021-3808
Computer Modem Access Number:
For filing flight plans and obtaining weather
briefings: 1-800-767-9989
For customer service: 1-800-345-3828
Data Transformation Corporation
108-D Greentree Road
Turnersville, NJ 08012
Computer Modem Access Number:
For filing flight plans and obtaining weather
briefings: 1-800-245-3828
For customer service: 1-800-243-3828
3.5.4 Inflight weather information is available from
any AFSS/FSS within radio range. The common
frequency for all AFSSs is 122.2. Discrete
frequencies for individual stations are listed in the
Airport/Facility Directory. See paragraph 6 for
information on broadcasts. En Route Flight Advisory
Service (EFAS) is provided to serve the non-routine
weather needs of pilots in flight. See paragraph3.8,
En Route Flight Advisory Service (EFAS), for details
on this service.
3.6 Use of Aviation Weather Products
3.6.1 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.
3.6.2 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).
3.6.3 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.
3.6.4 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
weather products (e.g., aviation weather R & D,
transition of weather products from R & D to
operational use, etc.).
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GEN 3.5-5
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Federal Aviation Administration Nineteenth Edition
3.6.5 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:
3.6.5.1 (D1) Sponsorship of user needs.
3.6.5.2 (D2) R & D and controlled testing.
3.6.5.3 (D3) Experimental application.
3.6.5.4 (D4) Operational application.
3.6.6 Weather products maturing into the D3
experimental stage of the AWTT process are often
made available to the public on the Aviation Weather
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