CIRCULAR Cl RCU LAR 139-AN19513 1 AVIATION USE OF OMEGA Third Edition - 1983 Approved 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 Aviation Organization. All correspondence, except orders and subscriptions, should be addressed to the Secretary General. Orders for this publication should be sent to one of the following addresses, together with 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. International Civil Aviation Organization Attention Distribution Offcer 1000 Sherbrooke Street West, Suite 400 Montreal, Quebec Canada H3A 2R2 Argentina. El Ateneo, Pedro Garcia S.A.L.E. e I., Dpto. Compras - Importation, Patagones 2463, 1282 Buenos Aires. Egypt. ICAO Representative, Middle East and Eastern African Office, 16 Hassan Sabri, Zamalek, Cairo. France. Representant de I'OACI, Bureau Europe, 3 bis , villa Emile-Bergkrat, 92522 Neuilly-sur-Seine, Cedex. India. Oxford Book and Stationery Co., Scindia House, New Dtlhi or 17 Park Street, Calcutta. Japan. Japan Civil Aviation Promotion Foundation, 15-12, 1-chome, Toranomon, Minato-Ku, Tokyo. Mexico. Representante de la OACI, Oficina Norteamerica y Caribe, Apartado postal 5-377, Mexico 5, D.F. Peru. Representante de la OACI, Oficina Sudamerica, lepartado 4127, Lima 100. Senegal. Representant de I'OACI, Bureau Afrique, Boite postale 2356, Dakar. Spain. Libreria de Aeronautica y Astronautica Sumaas, Desengaiio, 12-3'-3, Madrid 13. Sweden. C.E. Fritzes Kungl. Hovbokhandel, Box 16356, S-103 27 Stockholm. 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 BULLETIN The ICAO Bulletin contains a corrcise 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 publica- tions, their contents, amendments, supplements, corrigenda, and prices. Available in three separate ,editions English, French and Spanish. Annual subscription U.S. 1 5.00 surface mail U.S. 20.00 air mail.
FOREWORD This Circular is in response to Recommendation 1.114 of the Report on the Limited North Atlantic Regional Air Navigation Meeting 1976, concerning the publication by ICAO of an information circular containing a description of all relevant aspects of the Omega navigation system. The basic material was prepared by the United States Coast Guard, and was presented to ICAO by the Representative of the United States to the International Civil Aviation Organization. It has been treated editorially to align the terminology and phraseology with that normally used in ICAO publications. The third edition of the Circular includes amendments provided by the U.S. Coast Guard and presented to ICAO by the Chief, Radionavigation Division, U.S. Coast Guard, in August 1982. These amendments affect Section 1 and Section 2 of the Circular.
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