Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 988

b) between flight levels 100 to 250 for limited geographical areas, as determined by regional air navigation agreement. If the average elevation of the topography of the area could extend a significant topographical effect to flight level 100, a higher level should be specified for the base of the charts, in consultation with the WAFC concerned, and in accordance with regional air navigation agreement. 1.3.4 Recommendation.— Amendments to forecasts of significant weather phenomena should be issued with the minimum possible delay in accordance with the criteria in 1.4 and supplied in the form of amended BUFR files. 2007/70/II. szám Annex 3 — Meteorological Service for International Air Navigation Appendix 2 25/11/04 APP 2-2 1.4 Criteria for amendments to WAFS products Recommendation.— WAFCs should apply the following criteria for the amendment of significant en-route weather forecasts: SWH forecasts: turbulence, and occasional, frequent or embedded cumulonimbus Newly expected occurrence or non-occurrence SWM forecasts: aircraft icing, turbulence, cumulonimbus, and sandstorms/ duststorms Newly expected occurrence or non-occurrence Volcanic eruptions or the accidental release of radioactive materials into the atmosphere, of significance to aircraft operations: Inclusion or removal of volcanic activity symbol, or radiation symbol. 2. METEOROLOGICAL OFFICES 2.1 Use of WAFS products 2.1.1 The extent to which an aerodrome meteorological office prepares forecasts and/or makes use of products from WAFCs and other sources shall be determined by the meteorological authority concerned. 2.1.2 Recommendation.— Aerodrome meteorological offices should use output products of the world area forecast system in the preparation of flight documentation. 2.1.3 In order to ensure uniformity and standardization of flight documentation, the WAFS GRIB and BUFR data received shall be decoded into standard WAFS charts in accordance with relevant provisions in this Annex, and the content and identification of the originator of the WAFS forecasts shall not be amended. 2.2 Notification of WAFC concerning significant discrepancies Meteorological offices using WAFS GRIB and/or BUFR data shall notify the WAFC concerned immediately if significant discrepancies in accordance with 1.4 are detected or reported in respect of WAFS data and products. The WAFC receiving the message shall acknowledge its receipt to the originator, together with a brief comment on the report and any action taken, using the same means of communication employed by the originator. If it is considered necessary to issue an amendment, an appropriate ADMIN message shall be transmitted to all users through satellite broadcasts. Note 1.— There is no requirement for meteorological offices to report incidents of radiological emergencies. Note 2.— Guidance on reporting significant discrepancies is provided in the Manual of Aeronautical Meteorological Practice (Doc 8896). 3. METEOROLOGICAL WATCH OFFICES 3.1 Use of WAFS products The extent to which a meteorological watch office makes use of products from WAFCs and other sources shall be determined by the meteorological authority concerned. 4. VOLCANIC ASH ADVISORY CENTRES (VAAC) 4.1 Volcanic ash advisory information 4.1.1 Recommendation.— The advisory information on volcanic ash issued in abbreviated plain language, using approved ICAO abbreviations and numerical values of selfexplanatory nature, should be in accordance with the template shown in Table A2-1. When no approved ICAO abbreviations are available, English plain language text, to be kept to a minimum, should be used. 4.1.2 Recommendation.— The volcanic ash advisory information listed in Table A2-1, when issued in graphical format, should be as specified in Appendix 1. When issued in binary format, the BUFR code form should be used. Note.— The BUFR code form is contained in WMO Publication No. 306, Manual on Codes, Volume I.2, Part B — Binary Codes. 5. STATE VOLCANO OBSERVATORIES 5.1 Information from State volcano observatories Recommendation.— The information required to be sent by State volcano observatories to their associated ACCs, MWO and VAAC should comprise for: 2007/70/II. szám Appendix 2 Annex 3 — Meteorological Service for International Air Navigation APP 2-3 25/11/04

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