Circular 159. Report on the Area Forecast System

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Circular 159

Report on the Area Forecast System

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CIRCULAR REPORT ON THE AREA FORECAST SYSTEM Approved by the Secretary General and published under his authority INTERNATIONAL CIVIL AVIATION ORGANIZATION MONTREAL CANADA

Published in separate English, French, Russian and Spanish editions by the International Civil Aviation Organization. All correspondence, except orders and subscriptions, should be addressed to the Secretaty General of ICAO, P.O. Box 400, Place de liiviation internationale, 1000 Sherbrooke Street West, Montreal, Quebec, Canada H3A 2R2. Orders for this publication should be sent to one of the following addresses, together with the appropriate remittance by bank draft or post office money order in U.S. dollars or the currency of the country in which the order is placed. International Civil Aviation Organization. Attention Distribution Officer, P.O. Box 400, Place de I'Aviation internationale, 1000 Sherbrooke Street West, Montreal, Quebec, Canada H3A 2R2 Egypt Arab Republic of. ICAO Representative, Middle East and Eastern African Office, 16 Hassan Sabri, Zamalek, Cairo. France. Representant de I'OACI, Bureau Europe, 3 bis, villa Emile-Bergerat, 92200 Neuilly-sur-Seine. India. Oxford Book and Stationery Co., Scindia House, New Delh or 17 Park Street, Calcutta. Japan. Japan Civil Aviation Promotion Foundation, No. 38 Shiba Kotohira-Cho, Minato-Ku, Tokyo. Mexico. Representante de la OACI, Oficina Norteamerica y Caribe, Apartado postal 5-377, Mexico 5, D.F. Peru. Representante de la OACI, Oficina Sudamirica, Apartado 4127. Lima. Senegal. Representant de I'OACI, Bureau Afrique, Boite postale 2356, Dakar. Spain. Libreria de Aeronautics y Astronautics Sumaas, Desengaiio, 12-3O-3, Madrid 13. Sweden. C.E. Fritzes Kungl. Hovbokhandel, Fredsgatan 2, Box 16356, Stockholm 16. Thailand. ICAO Representative, Far East and Pacific Office, P.O. Box 614, Bangkok. United Kingdom. Civil Aviation uthorit, Printing and Publications Services, Greville House, 37 Gratton Road, Cheltenham, Glos., GL5O 2BN. Do you receive the ICAO BULLETIN The ICAO Bulletin contains a concise account of the activities of the Organization as well as articles of interest to the aeronautical world. The Bulletin will also keep you up to date on the latest ICAO publica- tions, their contents, amendments, supplements, corrigenda, and prices. Available in three separate edtons. Englsh, French and Spanish. Annual subscription U.S.St5.W surface mall U.S.20.00 air mail.

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.

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