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Convective SIGMET, or CWA.
EXAMPLEAttention
all aircraft. Hazardous weather information
(SIGMET, Convective SIGMET, AIRMET, urgent pilot
weather report (UUA), or Center Weather Advisory
(CWA)), (number or numbers) for (geographical area)
available on HIWAS, flight watch, or flight service
frequencies.
6.2.2 In HIWAS ARTCC areas, AFSSs/FSSs will
broadcast a HIWAS update announcement once on all
except emergency frequencies upon completion of
recording an update to the HIWAS broadcast.
Included in the broadcast will be the type of advisory
update; e.g., AWW, SIGMET, Convective SIGMET,
or CWA.
EXAMPLEAttention
all aircraft. Hazardous weather information for
(geographical area) available from flight watch or flight
service.
6.2.3 HIWAS availability is shown on IFR En Route
Low Altitude Charts and VFR Sectional Charts. The
symbol depiction is identified in the chart legend.
30 AUG 07
AIP
United States of America
GEN 3.5-21
15 MAR 07
Federal Aviation Administration Nineteenth Edition
7. Flight Information Services (FIS)
7.1 FIS. Aviation weather and other operational
information may be displayed in the cockpit through
the use of FIS. FIS systems are of two basic types:
Broadcast only systems (called FIS-B) and two-way
request/reply systems. Broadcast system components
include a ground- or space-based transmitter, an
aircraft receiver, and a portable or installed cockpit
display device. Two-way systems utilize transmitter/
receivers at both the ground- or space-based site and
the aircraft.
7.1.1 Broadcast FIS (i.e., FIS-B) allows the pilot to
passively collect weather and other operational data
and to display that data at the appropriate time. In
addition to textual weather products such as Aviation
Routine Weather Reports (METARs)/Aviation Selected
Special Weather Reports (SPECIs) and
Terminal Area Forecasts (TAFs), graphical weather
products such as radar composite/mosaic images,
temporary flight restricted airspace and other
NOTAMs may be provided to the cockpit. Two-way
FIS services permit the pilot to make specific weather
and other operational information requests for
cockpit display. A FIS service provider will then
prepare a reply in response to that specific request and
transmit the product to that specific aircraft.
7.1.2 FIS services are available from four types of
service providers:
7.1.2.1 A private sector FIS provider operating
under service agreement with the FAA using
broadcast data link over VHF aeronautical spectrum
and whose products have been reviewed and accepted
by the FAA prior to transmission. (Products and
services are defined under subparagraph 7.3.)
7.1.2.2 Through an FAA operated service using a
broadcast data link on the ADS-B UAT network.
(Products and services are defined under subparagraph
7.4.)
7.1.2.3 Private sector FIS providers operating under
customer contracts using aeronautical spectrum.
7.1.2.4 Private sector FIS providers operating under
customer contract using methods other than
aeronautical spectrum, including Internet data-tothe-
cockpit service providers.
7.1.3 FIS is a method of receiving aviation weather
and other operational data in the cockpit that
augments traditional pilot voice communication with
FAA's Flight Service Stations (FSSs), ATC facilities,
or Airline Operations Control Centers (AOCCs). FIS
is not intended to replace traditional pilot and
controller/flight service specialist/aircraft dispatcher
pre-flight briefings or inflight voice communications.
FIS; however, can provide textual and
graphical background information that can help
abbreviate and improve the usefulness of such
communications. FIS enhances pilot situational
awareness and improves safety.
7.1.4 To ensure airman compliance with Federal
Aviation Regulations, manufacturer's operating
manuals should remind airmen to contact ATC
controllers, FSS specialists, operator dispatchers, or
airline operations control centers for general and
mission critical aviation weather information and/or
NAS status conditions (such as NOTAMs, Special
Use Airspace status, and other government flight
information). If FIS products are systemically
modified (for example, are displayed as abbreviated
plain text and/or graphical depictions), the modification
process and limitations of the resultant product
should be clearly described in the vendor's user
guidance.
7.2 Operational Use of FIS. Regardless of the type
of FIS system being used, several factors must be
　
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