CIRCULAR REPORT ON THE AREA FORECAST SYSTEM Approved by the Secretary General and published under his authority INTERNATIONAL CIVIL AVIATION ORGANIZATION MONTREAL CANADA
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REPORT ON THE AREA FORECAST SYSTEM
FOREWORD This report contains the results of the first stage of the review of the area forecast system carried out by the Secretariat in pursuance of Recommendation 1314 of the Eighth Air Navigation Conference, held conjointly with the Extraordinary Session 1974 of the Commission for Aeronautical Meteorology of the World Meteorological Organization WMO. The first stage f the review, which was aimed primarily at fact finding and improvements in implementation, was carried out from 1976 to 1978 chiefly by ICAO regional office staff who visited some 90 States. A draft report was reviewed by the Air Navigation Commission in April 1979 it was circulated to all States and concerned international organizations for their information, comments and factual corrections. The present version of the report includes the numerous contributions received from States. The report is intended to inform States and international organizations of the progress made with the implementation of the area forecast system, to identify unresolved problems and, in some cases, to suggest improvements. For this purpose the report contains extensive information on the services available to aeronautical users from the existing and planned area forecast centres this includes tables and examples of area forecasts in chart form, in abbreviated plain language and in coded form. The report also presents a summary of the experience gained by States, pilots and airlines with the use of area forecast centre products both world-wide and in particular regions, and includes examples of flight documentation.