Circular 29. Specifications Adopted by Agencies of the United States Government for the Production of Route Charts of the World, Scale 1:2,000,000

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Circular 29

Specifications Adopted by Agencies of the United States Government for the Production of Route Charts of the World, Scale 1:2,000,000

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CIRCULAR 1953 INTERNATIONAL CIVIL AVIATION ORGANIZATION - MONTREAL CANADA SPECIFICATIONS ADOPTED BY AGENCIES OF THE UNITED STATES GOVERNMENT FOR THE PRODUCTION OF ROUTE CHARTS OF THE WORLD- SCALE 12000.000 Published by direction of the Council

This publication is issued in English, French and Spanish. Published in Montreal, Canada, by the International Civil Aviation Organization. Correspondence concerning publications should be addressed to the Secretary General of ICAO, International Aviation Building, 1080 University Street, Montreal, Canada. Orders for ICAO publications should be sent, on payment In Canadian currency , to Secretary General, ICAO, International Aviation Building, 1080 University Street, Montreal, Canada. Cable address ICAO MONTREAL In French currency fr, to ICAO Representative, European and African Office, 60bis, avenue d'Ihna, Paris 16e, France. Cable address ICAOREP PARIS In Sterling or Irish currency s d, to Her Majesty's Stationery Office, P.O. Box 569, London, S. E. 1, England. Cable address WHOLECORN, SEDIST, LONDON 1 In Egyptian currency L.E. , tc ICAO Representative, Middle East Office, Wadie Saad Building, Sharia Salah el Dine, Zamalek, Cairo, Egypt. Cable address ICAOREP CAIRO In Peruvian currency soles, to In Australian currency s d, to ICAO Representative, ICAO Representative, South American Office, Far East and Pacific Office, Apartado 680, 10 Weybridge Street, Lima, Peru. Surrey Hills, E.lO, Cable address ICAOREP LIMA Melbourne, Australia. Cable address ICAOREP MELBOURNE 1.

ICAO Circular 29-/25 .. FOREWORD The Aeronautical Charts Division MAP, at its fifth session in October 1951, recommended that the specifications in use by the United States chart-producing agencies for Route Charts 1 2,BT0,, 000 should be reproduced by ICAO and made available for the information of Contracting States a Final Report of the Session Doc 7222-/567, Recommendation No. 21, page 13 1. This recommendation was approved by the Council on 4 December 1951. The specifications issued by the Director of the U.S. Coast and Geodetic Survey are contained in this Circular and are published with the permission of the Government of the United States. Since they were designed for internal use by U. S. Government agencies, certain administrative references are not applicable elsewhere. It should be noted that, while the compilation and drafting instructions and the Symbol Sheet follow in general the Standards and Recommended Practices contained in Annex 4 - Aeronautical Charts, they are published only for information. A number of rout charts have bten published by the U. S. A. in con- formity with these specifications. Details eonc'erning the coverage and avail- ability of these charts is published in the ICAO Aeronautical Chart Catalogue Doc 71 01.

ICAQ Circular 29-/25 1 Page I..GENERAL ............................................... 3 A. Purpose and scope specifications ......................... 3 . .................................. B Definition 3 ................................ . C Liaison between agencies 3 I11 .. PROJECTION ............................................. 4 A. Latitude ............................................... 4 .............................................. . B Longitude 4 ............................................ . C Tick Marks 4 .............................................. . D Graticule 5 .............................................. IV.. SHEETSIZE 5 ................................................. . A Width 5 ................................................ . B Length 5 V. . GRAPHIC SCALES FOR THE MEASUREMENT OF DISTANCES ............................................... 5 VI .. BORDER DIMENSIONS ....................... .... .......... 6 VII .. CONVERSION OF ELEVATIONS . GRAPHIC SCALE ........... 6 VIII .. TITLE AND MARGINAL INFORMATION ..................... 7 A . Title .................................................. 7 . B Name ................................................ 7 ............................................... . C Number 7 D. Other Marginal Information ............ ................... 7 IX.. SYMBOLS ................................................ 8 ............................... X .. COMPILATION OF THE BASE 8

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