Provision of Meteorological Information

Information relevant to the services provided to aircralt operating in accordance with both visual flight rules and instrument flight rules in the seven ATS airspace classes is contained in 2.6.1 and 2.6.3 of Annex 11. A pilot may elect to fly in accradance with instrument flight rules in visual meteorological conditirais or may be required to do so by the appropriate ATS authority. Standard 2.1.2. 

It is also provided in the Annex that close haison shall be maintained between those concerned with the supply and those concerned with the use of meteorological information on matters which affect the provision of meteorological service for international air navigation. Furthermore, States have responsibility establish one or more aerodrome and/or other meteorological offices which shall be adequate for the provision of the meteorological service required to satisfy the needs of international air navigation.  

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