APPENDIX 7. TECHNICAL SPECIFICATIONS RELATED TO AERONAUTICAL CLIMATOLOGICAL INFORMATION (See Chapter 8 of this Annex.)
1. PROCESSING OF AERONAUTICAL CLIMATOLOGICAL INFORMATION Recommendation.— Meteorological observations for regular and alternate aerodromes should be collected, processed and stored in a form suitable for the preparation of aerodrome climatological information.
2.
EXCHANGE OF AERONAUTICAL CLIMATOLOGICAL INFORMATION
Recommendation.— Aeronautical climatological information should be exchanged on request between meteorological authorities. Operators and other aeronautical users desiring such information should normally apply to the meteorological authority responsible for its preparation.
3. CONTENT OF AERONAUTICAL CLIMATOLOGICAL INFORMATION
3.1 Aerodrome climatological tables 3.1.1 Recommendation.— An aerodrome climatological table should give as applicable: a) mean values and variations therefrom, including maximum and minimum values, of meteorological elements (for example, of air temperature); and/or b) the frequency of occurrence of present weather phenomena affecting flight operations at the aerodrome (for example, of sandstorms); and/or c)
the frequency of occurrence of specified values of one, or of a combination of two or more, elements (for example, of a combination of low visibility and low cloud).
3.1.2 Recommendation.— Aerodrome climatological tables should include information required for the preparation of aerodrome climatological summaries in accordance with 3.2.
3.2 Aerodrome climatological summaries Recommendation.— Aerodrome climatological summaries should cover: a) frequencies of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times; b) frequencies of visibility below specified values at specified times;
ANNEX 3
APP 7-1
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