Publication: Magyar Közlöny
Issue: MK-2009-104 (Year: 2009, Number: 104)
Era: 2004-2010
Section: 
Paragraph Index: 324

c) the touchdown zone, the mid-point and stop-end of the runway intended for Category III instrument approach and landing operations. 4.6.3.5 The units providing air traffic service and aeronautical information service for an aerodrome shall be kept informed without delay of changes in the serviceability status of the automated equipment used for assessing runway visual range. 4.6.4 Present weather 4.6.4.1 The present weather occurring at the aerodrome and/or its vicinity shall be observed and reported as necessary. The following present weather phenomena shall be identified, as a minimum: precipitation and freezing precipitation (including intensity thereof), fog, freezing fog and thunderstorms (including thunderstorms in the vicinity). 4.6.4.2 Recommendation.— For local routine and special reports, the present weather information should be representative of conditions at the aerodrome. 4.6.4.3 Recommendation.— For METAR and SPECI, the present weather information should be representative of conditions at the aerodrome and, for certain specified present weather phenomena, in its vicinity. 4.6.5 Clouds 4.6.5.1 Cloud amount, cloud type and height of cloud base shall be observed and reported as necessary to describe the clouds of operational significance. When the sky is obscured, vertical visibility shall be observed and reported, where measured, in lieu of cloud amount, cloud type and height of cloud base. The height of cloud base and vertical visibility shall be reported in metres (or feet). Annex 3 — Meteorological Service for International Air Navigation Chapter 4 7/11/07 4-6 4.6.5.2 Recommendation.— Cloud observations for local routine and special reports should be representative of the approach area. 4.6.5.3 Recommendation.— Cloud observations for METAR and SPECI should be representative of the aerodrome and its vicinity. 4.6.6 Air temperature and dew-point temperature 4.6.6.1 The air temperature and the dew-point temperature shall be measured and reported in degrees Celsius. 4.6.6.2 Recommendation.— Observations of air temperature and dew-point temperature for local routine and special reports and METAR and SPECI should be representative of the whole runway complex. 4.6.7 Atmospheric pressure The atmospheric pressure shall be measured, and QNH and QFE values shall be computed and reported in hectopascals. 4.6.8 Supplementary information Recommendation.— Observations made at aerodromes should include the available supplementary information concerning significant meteorological conditions, particularly those in the approach and climb-out areas. Where practicable, the information should identify the location of the meteorological condition. 4.7 Reporting meteorological information from automatic observing systems 4.7.1 Recommendation.— METAR and SPECI from automatic observing systems should be used by States in a position to do so during non-operational hours of the aerodrome, and during operational hours of the aerodrome as determined by the meteorological authority in consultation with users based on the availability and efficient use of personnel. Note.— Guidance on the use of automatic meteorological observing systems is given in the Manual on Automatic Meteorological Observing Systems at Aerodromes (Doc 9837) . 4.7.2 METAR and SPECI from automatic observing systems shall be identified with the word “AUTO”. 4.8 Observations and reports of volcanic activity Recommendation.— The occurrence of pre-eruption volcanic activity, volcanic eruptions and volcanic ash cloud should be reported without delay to the associated air traffic services unit, aeronautical information services unit and meteorological watch office. The report should be made in the form of a volcanic activity report comprising the following information in the order indicated:

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