STANDARDS AND RECOMMENDED PRACTICES METEOROLOGICAL CODES ANNEX 3 TO THE CONVENTION ON INTERNATIONAL CIVIL AVIATION This Annex, published by authority of the Council, comes into force for Implementation on 1 January 1952. SECOND EDITION Incorporating Amendments Numbered 1 to 21 and 22 to 37 Effective 1 October 1951 INTERNATIONAL CIVIL AVIATION ORGANIZATION
Printed in English, French and Spanish, separately issued under the titles of METEOROLOGICAL CODES CODES MCTOROLOGIQUES CLAVES METEOROLOGICAS Published in Montreal, Canada, by the Interna- tional Civil Aviation Organization. Correspondence concerning publications should be addressed to the Secretary Genera of ICAO, International Aviation Building, 1080UniversityStreet, Montreal, Canada.
TABLE OF CONTENTS Introduction ............................................ 5 Definitions ................................................ 5 ......................................... Adoption of Annex 5 ................................... Implementation of Annex 6 Language ................................................. 6 Editorial Note ............................................. 6 .............................................. . CHAPTER 1 - General ................................... 1.1. - Synoptic Reports ....................... 1.2. - Station Meteorological Reports 1.3. - Analyses .......................................... 1.4. - Forecasts for an Area. Route, Flight, or Aerodrome .......... Transmitted between Meteorological Offices ............ 1.5. - Station Meteorological Reports for Aircraft .......... 1.6. - Aerodrome Forecasts Transmitted to Aircraft .............. 1.7. - Flight Forecasts Transmitted to Aircraft 1.8. - Reports of Aircraft Meteorological Observations ........ 1.9. - Post-Flight Reports. ................................ .. ................,.... 1.10. - Meteorological Zone Numbers ., ................................. CHAPTER 2 .-- Details of Code Forms 10 ............... 2.1. - Symbolic Form of Reports for Aircraft. 10 2.2. -Symbolic Form of Reports of Sudden Deterioration or .......................... Improvement in Weather 10 2.3. -Symbolic Form of Reports from Aircraft other than Meteorological Reconnaissance Aircraft ............. 10 ....... 2.4. - Symbolic Form of Code for Aerodrome Forecasts 11 2.5. - Symbolic Form of Code for Area Forecasts ............ 11 2.6. - Symbolic Form of Code for Route and Flight Forecasts 11 ........................ CHAPTER 3 .-- Code Symbols and Specifications 12 ...................................... 3.1. - Code SymboIs 12 ................................. 3.2. - Code Specifications 14 ATTACHMENT . - Notes on the Use of the Aeronautical Meteorological Codes ........................................... 27 .Section 1 . -Code for Station Meteorological Reports for Aeronautical Purposes ........................ 27 .................. Section 2 . - Codes for Aerodrome Forecasts 29 ........................ Section 3 . - Codes for Area Forecasts 30 ............. . Section 4 - Codes for Route and Flight Forecasts 31 Section 5 . - POMAR Code Form ........................... 33
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