Page 152 - UK ATM ANS Regulations (Consolidated) 201121

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

MET.TR.270 Tropical cyclone advisory centre responsibilities
(a) The advisory information on tropical cyclones shall be issued for tropical cyclones when
the maximum of the 10-minute mean surface wind speed is expected to reach or exceed
34 kt during the period covered by the advisory.
(b) The advisory information on tropical cyclones shall be in accordance with Appendix 7.
(c) Tropical cyclone advisory, if disseminated in digital form, shall be:
(1) formatted in accordance with a globally interoperable information exchange model
and shall use geography markup language (GML);
(2) accompanied by the appropriate metadata.
(d) Tropical cyclone advisory information, when prepared in graphical format, shall be issued
using the portable network graphics (PNG) format.
MET.TR.270(b) GM1 Tropical cyclone advisory centre responsibilities

MET.TR.270(c) GM1 Tropical cyclone advisory centre responsibilities
TROPICAL CYCLONE ADVISORY — DIGITAL FORM
(a) When a tropical cyclone advisory is disseminated in digital form, this is in addition to the
tropical cyclone advisory code form.
(b) Guidance on the information exchange model, GML, and metadata profile is provided in
ICAO Doc 10003 ‘Manual on the ICAO Meteorological Information Exchange Model’.
MET.TR.270(d) AMC1 Tropical cyclone advisory centre responsibilities
TROPICAL CYCLONE ADVISORY INFORMATION — GRAPHICAL FORMAT
The tropical cyclone advisory information listed in Appendix 7 to Annex V (Part-MET) to Regulation
(EU) 2017/373, when prepared in graphical format, should be as specified below.
Example of tropical cyclone advisory in graphical format from the La Réunion TCAC.
Note: The example below is based on a real event.

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