CIRCULAR CIRC ULAR 2 1 -AN/ 18 1 SEPTEMBER 195 1 TIMED APPROACHES AND UTILIZATION OF RADAR IN SPACING OF AIRCRAFT ON FINAL APPROACH Reduction of Intervals between Successive Approaches and Landings Published by authority of the Secretary General INTERNATIONAL CIVIL AVIATION ORGANIZATION MONTREAL CANADA
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 Secr-etary General of ICAO, International Aviation Building, 1080 University Street, Montreal, Canada. Orders for ICAO publications should be sent, on payment In Canadian currency , to In Sterling or Irish currency s/d, to Secretary General, ICAO, The United Kingdom Stationery Office. International Aviation Building, P. 0. Box 569, 1080 University Street, London, S. E. 1, Montreal, Canada. England. Cable address ICAO MONTREAL Cable address HEMSTONERY LONDON In French currency fr, to ICAO Representative, ICAO Representative, European and African Office, Middle East Office, 6obis, avenue dfIbna, Wadie Saad Building, Paris i6e. France. Sharia Salah el Dine, Cable address ICAOREP PARIS 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, 17 Robe Street, Lima, PerG. St. Kilda, Cable address ICAOREP LIMA Melbourne, Australia. Cable address ICAOREP MELBOURNE.
ICAO Circular 21-A.I/18 3 F ORE1J ORD The purpose of ICAO Circulars is to distribute information bearing upon the progress of ICAOBs work more widely than would be sossible I'or the ordinaxy series of documents, The present eir cular publishes informative mter ial, drafted by the fourth session of the RAC Division ovenber - December 1950, on two possible nethods which can be used to reduce the time interval bet,ieen successive approaches and lariling.
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