Page 114 - UK ATM ANS Regulations (Consolidated) 201121

Part MET - ANNEX V - Specific Requirements for the Providers of Meteorological
Services

MET.OR.265(a) GM1 Volcanic ash advisory centres (VAACs) responsibilities
DISTRIBUTION OF METEOROLOGICAL DATA
The AFS address to be used by the VAACs is given in ICAO Doc 9766 ‘Handbook on the International
Airways Volcano Watch (IAVW)’.
MET.OR.270 Tropical cyclone advisory centre responsibilities
A TCAC shall provide:
(a) advisory information concerning the position of the cyclone centre, its direction and speed
of movement, central pressure and maximum surface wind near the centre in abbreviated
plain language to:
(1) meteorological watch offices in its area of responsibility;
(2) other TCACs whose areas of responsibility may be affected;
(3) WAFCs, international OPMET databanks and centres responsible for the operation
of the aeronautical fixed service internet-based services;
(b) updated advisory information to meteorological watch offices for each tropical cyclone, as
necessary, but at least every 6 hours.
MET.OR.275 World area forecast centre responsibilities
(a) The WAFC shall provide, in a digital form:
(1) gridded global forecasts of:
(i) upper wind;
(ii) upper-air temperature and humidity;
(iii) geopotential altitude of flight levels;
(iv) flight level and temperature of tropopause;
(v) direction, speed and flight level of maximum wind;
(vi) cumulonimbus clouds;
(vii) icing;
(viii) turbulence;
(2) global forecasts of significant weather (SIGWX) phenomena, including volcanic
activity and release of radioactive materials.
(b) The WAFC shall ensure that world area forecast system products in digital form are
transmitted using binary data communications techniques.
SUBPART B TECHNICAL REQUIREMENTS FOR PROVIDERS OF METEOROLOGICAL SERVICES (MET.TR)
MET.TR.115 Meteorological bulletins
(a) Meteorological bulletins shall contain a heading consisting of:
(1) an identifier of four letters and two figures;
(2) the ICAO four-letter location indicator corresponding to the geographical location of
the meteorological service provider originating or compiling the meteorological
bulletin;
(3) a day-time group;
(4) if required, a three-letter indicator.
(b) Meteorological bulletins containing operational meteorological information to be
transmitted via the AFTN shall be encapsulated in the text part of the AFTN message
format.
MET.TR.115(a) GM1 Meteorological bulletins
ALPHANUMERICAL FORMAT
The format of the meteorological bulletins is understood to be that in alphanumerical format.
MET.TR.115(a) GM2 Meteorological bulletins
COMPOSITION AND FILING TIMES OF BULLETINS
(a) Whenever possible, exchanges of operational meteorological information should be made
in consolidated bulletins of the same types of meteorological information.
(b) Meteorological bulletins required for scheduled transmissions should be filed regularly and
at the prescribed scheduled times.
MET.TR.115(a) GM3 Meteorological bulletins
HEADING
Detailed specifications on format and contents of the heading are given in the WMO Publication N o
386, Manual on the Global Telecommunication System, Volume I, and in the ICAO Manual of
Aeronautical Meteorological Practice (ICAO Doc 8896).
MET.TR.115(a)(2) GM1 Meteorological bulletins
LOCATION INDICATOR
ICAO location indicators are listed in ICAO Doc 7910 - Location Indicators.
MET.TR.200 Meteorological reports and other information
(a) Local routine report, local special report and METAR shall contain the following elements
in the order indicated:
(1) identification of the type of report;
(2) location indicator;
(3) time of the observation;
(4) identification of an automated or missing report, when applicable;
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