Circular 212. Secondary Surveillance Radar Mode S Data Link

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Circular 212

Secondary Surveillance Radar Mode S Data Link

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ICAO CIRCULAR 212-AN/129 CIRCULAR SECONDARY SURVEILLANCE RADAR MODE S DATA LINK proved by the Secretary General and published under his authority INTERNATIONAL CIVIL AVIATION ORGANIZATION MONTREAL CANADA

Published in separate English, French, Russian and Spanish editions by the International Civil A viation Organization. All correspondence, except orders and subscripions, should be addressed to the Secretary General. Orders for this publication should be sent to one of the following addresses, topether wth the appropriate remittance by bank draft or post office money order in U.S. dollars or the currency of the country in which the order is placed. Document Sales Unit International Civil Aviation Organization 1000 Sherbrooke Street West, Suite 400 Montreal, Quebec Canada II3A 2R2 Egypt. ICAO Representative, Middle East Office, 16 Hassan Sabri, Zamalek, Cairo. France. Representant de I'OACI, Bureau Europe, 3 bis, villa mile-Bergerat, 92522 Neuilly-sur-Seine Cedex. India. Oxford Book and Stationery Co., Scindia House, New Delhi or 17 Park Street, Calcutta. Japan. Japan Civil Aviation Promotion Foundation, 15-12, I-chome, Toranomon, Minato-Ku, Tokyo. Kenya. ICAO Representative, Eastern and Southern African Office, United Nations Accommodation, P.O. Box 46294 Nairobi. Mexico. Representante de la OACI, Oficina Norteamerica, Centroamerica y Caribe, Apartado postal 5-377, C.P. 11590, Mexico 5, D.F. Peru. Representante de la OACI, Oficina Sudamerica, Apartado 4127, Lima 100. Senegal. Representant de I'OACI, Bureau Afrique occidentale et centrale, Boite postale 2356, Dakar. Spain. Pilot's, Suministros Aeronauticos, S.A., C/Ulises, 5-Oficina Num. 2, 28043 Madrid. Thailand. ICAO Representative, Asia and Pacific Office, P.O. Box 614, Bangkok. United Kingdom. Civil Aviation Authority, Printing and Publications Services, Greville House, 37 Gratton Road, Cheltenham, Glos., GLSO 2BN. Do you receive the ICAO BULETIN The ICAO Bulletin conciis a concise account of the activities of the Organization as well as articles of interest to the aeronautical world. The Bulletin will also keep you up to date on the latest ICAO publications, their contents,'arnendments, supplements, corrigenda and prices. Available in three separate editions English, French and Spanish. Annual subscription U.S.20.00 surface mail U.S.25.00 air mail.

The ICAO Cornrnunications Divisional Meeting in Ap'ril 1931 reconneraded the establishment of an appropriate body to develop Standards,. Recommended Practices, guidance material and procedures related to secondary surveillance radar sSR enhancement and related data link and collision avoidance sys terns. In November 1981 the Air Navigation Commission ANC approved this recommendation and accordingly established the SSR Improvements and Collision Avoidance Systems Panel SICASP to advance this work. To date, the panel has held three meetings the first in May 1983, the second in October/November 1984, and the third in MarchIApril 1987. As a result of the work of the panel, two circulars have been issued, concerning SSR Mode S Circular 174 and Airborne Collision Avoidance circular 195, Furthermore, at its second meeting, the panel proposed amendments to the existing Standards and Recommended Practices SARPS for SSR systems intended to define and standardize the characteristics of SSR Mode So Following consideration of the subject by the Communications/Operatfons Divisional Meeting 1985 and consultation with States and international organizations, the Air Navigation Commission recommended an amendment to Annex 10, Volume I, which was subsequently adopted by Council and became applicable on 22 October 1987 as a part of Amendment 67. This document is the third circular resulting from the work of the SICAS Panel. It describes the background, communications features, characteristics, design, equipment and potential applications of the SSK Mode S data link. Appendices provide a glossary of relevant terms and a summary of open systems interconnection OSI considerations. In view of the stage of development of a cunceptual architecture, and the development and standardization activities under way elsewhere, this circular on the Mode S data link design is intended as a means of fostering interoperability with other aeronautical data link developments, as well as providing information to the international aviation community.

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