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Annex 3. Edition 3
METEOROLOGICAL CODES
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., ,'. i . .-.-" . . INTERNATIONAL STANDARDS AND RECOMMENDED PRACTICES METEOROLOGICAL CODES ANNEX 3 . .. . ,
INTERNATIONAL STANDARDS AND RECOMMENDED f RACTLCES METEOROLOGICAL CODES ANNEX 3 TO THE CONVENTION ON INTERNATlON CIVIL AVIATION THIRD EDITION - JANUARY 1955 This edition incorporates all rntcndnlents adopted by the Council prior to 1 Octolcr 1954 and supersedes, on 1 January 1955, all previous etlitions of Annex 3. INTERNATIONAL CIVIL AVIATION ORGANIZATION
Printed in English, French and Spanish, separately issued under the titles of METEOROLOGICAL CODES CODES MITOROLOGIQUES CLAVES M ETEOROLGICAS Published in Montreal, Canada, by the Interna- tional Cid Aviation Organiwtion. Correspondence concerning publications should be addressed to the Secretary General of ICAO, International Aviation Building, 1080 University Street, Montreal, Canada.
International Standards and Recommended Practices METEOROLOGICAL CODES Third Edition - 1 January 1955 .......... 1 .I.-Synoptic reports. 5 1.2.-Station meteorological ................... reports 5 TABLE OF CONTENTS 1.6.-Aerodrome forecasts trans- mitted to aircraft.. ........ 1.7.-Flight forecasts transmitted to aircraft.. .............. 1.8.-Reports of aircraft mete- orological observations. .... 1.9.-Exchange of aircraft mete- orological observations.. ... CHAPTER 3,-Code symbols and spe- 5 cifications for the POMAR Cod ........... 3.1.-Code symbols.. 3.2 .-Specifications. ............ 6 CHAPTER 4.-AIREP form of air- report .......................... 6 4.1.-Contents and order of the elements ................. 1. f 0.-Meteorological zone 1.4.-Forecasts fcir an area, route, numbers ................. flisht, or aerodrome trans- 6 ATTACHMENT A.-Notes on the use of ............. mitted between meteoro- the POMAR Code.. 9 logical offices ............ 5 CHAPTER 2.-Symbolic form of figure code reports from aircraft other ATTACHMENT B.-Aeronautical mete- 1.5.-Station meteorological than meteorological reconnaissance orological codes and notes on their reports for aircraft.. ....... 5 aircraft.. ....................... 6 use.. .......................... 12 FOREWORD Historical background Standards and Recommended Practices for meeorological codes were first adopt- ed by the Council on 16 April 1948, pur- suant to the provisions of Article 37 of the Convention on International Civil Avia- tion Chicago 1944, and designated as Annex 3 to the Convention. They became effective on 15 September 1948. The Standards and Recommended Practices were based on recommendations of the Special Session of the Meteorology Divi- sion, held in September 1947. Amendments 1 to 21 to these Standards and Recom- mended Practices became applicable on 1 January 1949, when the International 'Meteorological Organization introduced new meteorological figure codes. A further series of Amendments, numbered 22 0 3'1, became applicable on 1 January 1952, prinarily providing for the use of plain language and introducing a simplified code for flight conditions in air-reports. Amendments 38 and 39, arising out of recommendations of the First Air Naviga- tion Conference and related to the intro- duction of the radiotelephony or radio- telegraphy form AIREP and a revised radiotelegraphy form of POMAR Code for air-reports. became applicable on 1 Sep- tember 1954. The introduction by the World Mete- orological Organization of a new set of numerical meteorological codes on 1 January 1955 finally caused Amendment 40 to be applied as from 1 January 1955. By this amendment all numerical mete- orological codes heretofore contained in the Annex as Standards, except the POMAR Code, were eliminated as a result of arrangements concluded with the World Meteorological Organization. Amendment 40 further authorizes the use in interna- tional air navigation of the new mete- orological codes promulgated by WMO for application by 1 January 1955. This third edition of Annex 3 incorpo- rates all amendments up to and including Amendment 40. Applicability The application of the Standards con- tained in this document, by all Contract- ing States, is necessary whenever mete- orological information is transmitted for aeronautical purposes.
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