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services and search and rescue services units in respect of the
flight information regions, control areas and search and rescue
regions for which those offices are responsible, and in particular
to flight information centres, area control centres and
rescue coordination centres and the associated aeronautical
telecommunications stations.
11.1.3 Suitable telecommunications facilities shall be
made available to permit world area forecast centres to supply
the required world area forecast system products to meteorological
offices, meteorological authorities and other users.
1 1.1.4 Telecommunications facilities between meteorological
offices and, as necessary, aeronautical meteorological
stations and aerodrome control towers or approach control
offices shall permit communications by. direct speech, the
speed with which the communications can be established
being such that the required points may normally be contacted
within approximately 15 seconds. -
1 1.1 .S Recommendation.- Telecommunications facilities
between meteorological offices and flight information
centres, area control centres, rescue coordination centres and
aeronautical telecommunications stations should permit:
a) communications by direct speech, the speed with which
the communications can be established being such that
the required points may normally be contacted within
approximately 15 seconak; and
b) printed communications, when a record is required by
the recipients; the message transit time should not
exceed 5 minutes.
Note.- In 11.1.4 and 11.1.5 "approximately 15 secondr"
refers to telephony communications involving switchboard
operation and "5 minutes" refers to printed communications
involving Htransmission.
1 1.1.6 Recommendation.- The telecommunications
facilities required in accordance with 11.1.4 and 11.1.5 should
be supplemented, as and where necessary, by other forms of
visual or audio communications, for example, closed-circuit
television or separate information processing systems.
1 1.1.7 Recommendation.- As agreed between the
meteorological authority and operators, provision should be
made to enable operators to establish suitable telecommunications
facilities for obtaining meteorological information
from aerodrome meteorological offices or other appropriate
sources.
1 1.1.8 Suitable telecommunications facilities shall be
made available to permit meteorological offices to exchange
operational meteorological information with other meteorological
offices.
1 1.1.9 Recommendation.- The telecommunications facilities
used for the exchange of operational meteorological
information should be the aeronautical futed service.
11.2 Use of aeronautical fixed service
communications - meteorological bulletins
in alphanumeric format
Meteorological bulletins containing operational meteorological
information to be transmitted via the aeronautical fixed service
shall be originated by the appropriate meteorological office or
aeronautical meteorological station.
Note.- Meteorological bulletins containing operational
meteorological information authorized for transmission via the
ANNEX 3 11-1 25/11/04
Annex 3 - Meteorological Service for International Air Navigation Chapter 11
aeronautical fmed service are listed in Annex 10, Volume Ii,
Chapter 4, together with the relevant priorities and priority
indicators.
11.3 Use of aeronautical fixed service
communications - world area forecast
system products
Recommendation.- World area forecast system products
in digital form should be transmitted using binary data
communications techniques. The method and channels used for
the dissemination of the products should be as determined by
regional air navigation agreement.
11.4: Use of aeronautical mobile service
communications
The content and fonnat of meteorological information
transmitted to aircraft and by aircraft shall be consistent with
the provisions of this Annex.
11.5 Use of aeronautical data link service -
contents of D-VOLMET
DVOLMET shall contain current METAR and SPECI,
together with trend forecasts where available, TAF and
SIGMET, special air-reports not covered by a SIGMET and,
where available, AIRMET.
Note.- The requirement to provide METAR and SPECZ
may be met by the data link-flight information service (D-FIS)
applicution entitled "Dutu link-uerodrome routine meieorological
report (D-METAR) service"; the requirement to
provide TAF may be met by the DFIS application entitled
"Data link-aerodrome forecast (D-TAF) service"; and the
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