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Doc 8400. Edition 4
Amendment No. 21
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Amendment No. 21 to the Procedures for Air Navigation Services ICAO ABBREVIATIONS AND CODES Doc 8400 1. Insert the following replacement pages in the PANS-ABC Fourth Edition to incorporate Amendment No. 21, applicable on 1 July 1993 a Pages v and viii b Pages 1- 1 to 1-24 c Pages 3-1 and 3-3 d Pages 8-1 to 8-17 2. Record the entry of this amendment on page ii.
Doc 840014 Amendment No. 21 1/7/93 AMENDMENT No. 21 TO THE PROCEDURES FOR AIR NAVIGATION SERVICES ICAO ABBREVIATIONS AND CODES FOURTH EDITION - 1989 INTERNATIONAL CIVIL AVIATION ORGANIZATION
Checklist of Amendments to the PANS-ABC Doc 8400, Fourth Edition Date of applicability Fourth Edition incorporates all amendments approved by the Council prior to 25 February 1989 Amendment No. 21 approved by the Council on 2 December 1992 Replacement pages v, viii, 1-1 to 1-24, 3-1, 3-3, 8-1 to 8-17 16 November 1989 1 July 1993
FOREWORD 1. Introduction This document contains abbreviations and codes approved by the Council of ICAO for world-wide use in the international aeronautical telecommunication service and in aeronautical information documents, as appropriate, and uniform abbrevi- ated phraseology for use in pre-flight information bulletins, with the status of Procedures for Air Navigation Services in abbreviated form the PANS-ABC. This document is the outgrowth of study by the Air Navigation Commission in consultation with States in the matter of controlling and co-ordinating abbreviations and codes. It brings together all abbreviations and codes for use in aircraft operations with the following exceptions a De.signtors,for Aircrufi Operating Agencies, Aeronautical Autlzoritie,s and Services proniulgated in Doc 8585. b Data designators and geographical designators for meteorological bulletins given in the Munral cf Aero- nautical Meteorological Practice Doc 8896. c Aeronautical meteorological codes given in the Manual qf Aeronautical Meteorological Practice Doc 8896. d Additional abbreviations for restricted use in AIS docu- ments given in the Aeronautical lnfortnation Services Munual Doc 8 126. e Location Indicutors given in Doc 79 10. f Aircraft me Designators given in Doc 8643. Table A shows the origin of each edition of the PANS- ABC issued since 1964 and subsequent amendments thereto, together with a list of the principal subjects involved, the dates on which the amendments were approved by the Council and the dates on which they became applicable. 2. Principles for formulation of abbreviations The principles applied in the formulation of ICAO abbrevi- ations are a that allocation of more than one signification to a single abbreviation should be avoided except where it can be reasonably determined that no instances of niisinterpret- ation would arise b that allocation of more than one abbreviation to the same signification should be avoided even though a different use is prescribed c that abbreviations should make use of the root word or words and should be derived from words conimon to the working languages except that where it is impracticable to apply this principle to best advantage, the abbreviation should follow the English text d that the use of a singular or plural form for the signification of an abbreviation should be selected on the basis of the more common use e that an abbreviation may represent grammatical variants of the basic signification where such application can be made without risk of confusion and the desired grammatical form can be determined from the context of the message. With respect to the latter principle, several variants are given for a number of abbreviations where it might not be obvious that the variant is appropriate or acceptable. 3. Specifications governing the use of abbreviations Specifications governing the use of the abbreviations and codes are contained in the following ICAO Annexes and PANS a use of abbreviations in the aeronautical information ser vice 3.4.4 of Annex 15 b use of the NOTAM Code 5.3.5 of Annex 15 c use of abbreviations and codes in the international aero- nautical telecommunications service 3.7 of Annex 10, Volume 11 d use of abbreviations on aeronautical charts 2.3.3 and 2.9 of Annex 4 e use of abbreviations in plain language meteorological mes- sages Chapters 3, 4, 5, 6 and 7 and Attachment B of Annex 3 1/7/93 No. 21
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