Annex 4. Издание 3. SUPPLEMENT of January 1954

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Annex 4. Издание 3

SUPPLEMENT of January 1954

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Please insert the following Supplement, which super sedes the Supplement dated December 1950 at the end of your copy of Annex 4 - Aeronautical Charts Third Edition "SUPPLEMENT TO ANNEX 4, Third Edition Aeronautical Charts Differences-between the national regulations and practices of Skalta and Yhe cnrrsponding 5utcxaational Standards contained in Annex 4 Third Edition as notified to ICAO in accordance with Article 38 of the Convention ongaternational Civil Aviation and the Council's resolution of 19 June 1952 Published by authority of the Council January - 1954 INTERNATIONAL CIVIL AVIATION ORGANIZATION

2 Supplement to Annex 4, Third Edition - Aer cjnarl ti ccl Cljrirt s - -- Q.D-.oF. ..A .hTE-NQ pl-QLT"s 'Date Entered by No.-71 Entered by

SUPPLEMENT TO ANNEX 4, THIRD EDITION - AERONAUTICAL CHARTS 3 . ...- -- --,-. .............. ----.-- CONTRACTING STATES WHICH HAVE NOTIFIED ICAO THAT NO DIFFERENCES WILL EXIST BETWEEN THEIR NATIONAL REGULATIONS AND PRACTICES AND THE INTERNATIONAL STANDARDS AND RECOMMENDATIONS OF ANNEX 4 - THIRD EDITION Argentina Ceylon Guatemala Pakistan Austria Cuba Haiti Philippines Brazil Denmark Italy Portugal Burma Dominican Republic Mexico Switzerland Canada Greece Netherlands PART 11 CONTRACTING STATES FROM WHICH NO INFORMATION HAS BEEN RECEIVED -- Afghanistan Bolivia Chile China Colombia Czechoslovakia Egypt El Salvador Ethiopia Honduras Iceland Indonesia Iran - Iraq Israel Japan Jordan Peru Korea Poland Lebanon Spain Liberia Syria Libya Thailand Luxembourg Turkey Nicaragua Paraguay PART 111 JXXTRACTING STATES WHICH HAVE NOTIFIED DIFFERENCES TO ICAO WHICH WILL EXIST BETWEEN THEIR NATIONAL REGULATIONS AND PRACTICES AND THE INTERNATIONAL STANDARDS AND RECOMMENDATIONS OF ANNEX 4 - THIRD EDITION Contractine State Page Australia ................. 4 Belgium ................. 6 Finland ,. ................. 6 France .................. 6 India ..................... 8 Italy .................. 8 New Zealand ............... 8 Norway. ............... 9 Sweden .................. 9 Union of South Africa ............ 10 .............. United Kingdom 10 United States of America ....... 11 ................ Index Table 13

4 Supplement to Annex 4, Third Edition - Aeronautical Charts PART fII Contld SUMMARY OF DIFFERENCES .AND COMMENTS AUSTRALIA Definitions Elevation of an "Australia does not agree with the definition of "elevation of Aerodrome an aerodrome1' and considers that this elevation should be the mean and not the highest point of the usable landing area. The following definitions have therefore been adopted in Australian practices and Standards a Aerodrome Reference Point A designated point established in the horizontal plane at or near the - geometric centre .of the landing area at an elevation corresponding to the mean elevation of the usable landing area b Elevation of an Aerodrome The elevation of the aerodrome reference point for a particular aerodrome. The reason for this deviation from the ICAO Standard is that it is considered that, from the operational point of view, it is immaterial whether the highest point, the lowest point or the mean elevation of the usable area is adopted as the official aerodrome elevation, provided that whichever is adopted, is made clear to all concerned and is made the same for all aerodromes . If the highest point were adopted as the definition of the Aerodrome Elevation it would result in there being two separate and different elevation datums for every aerodrome - the aerodrome elevation and the elevation of the aerodrome reference point. On the other hand, by adopting "the mean elevation of the usable landing area" it would be possible to make the official I1Aerodrome Elevationt1 coincide with the elevation of the Aerodrome Reference Point 'in almost all cases. This would result in an overall simplification and would avoid much confusion. Chapter 2 2.9.2.2 and "Graduations of tint will be obtained from each colour by use 2.9.2.3 of a single ruling and solid colour only, for charts covering the Australian continent, because of the comparatively small

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