61 STAT.] UNITED KINGDOM-TELECOMMUNICATIONS-OCT. 13 , 1947 Agreement between the United States of America and the United Kingdom of Great Britain and Northern Ireland respecting standardization of distance measuring equipment for telecommunications. Signed at Washington October 13, 1947; entered intoforce October 13, 1947. AGREEMENT BETWEEN THE GOVERNMENT OF THE UNITED STATES OF AMERICA AND THE GOVERNMENT OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND ON DISTANCE MEASURING EQUIP- MENT The Government of the United States of America and the Govern- ment of the United Kingdom of Great Britain and Northern Ireland; Considering the importance of standardization of the distance measuring equipment (D.M.E.) as an aid to the safety of air naviga- tion, and considering the immediate need, in view of the decisions of the 1947 Atlantic City Radio Administrative Conference of the International Telecommunication Union, for agreement on the radio frequencies to be used for this purpose, have agreed through their respective representatives as follows: Article 1 On the coming into force of this agreement, standardization of D.M.E. for civil aviation shall be in the 1000 Mc/s. band and not in the 200 Mc/s. band. Article 2 Until January 1, 1952, the United States of America shall, at the request of the United Kingdom, install and operate United Kingdom type D.M.E. in the 220-231 Mc/s. band at designated internatlional airfields in the territory of the United States of America to be agreed upon from time to time. The frequency 223 Mc/s. shall be used for the ground responder and the frequency 228 Mc/s. shall be used for the airborne interrogator. Article 3 Beyond interference distance from the United States of America, the United Kingdom proposes to use the band 200-235 Mc/s. for D.M .E., and to complete the transition from this band to the 1000 Mc/s. band by January 1, 1954, as far as concerns designated inter- national airfields. Article 4 Until January 1, 1954, or until such time as the requisite equip- ment is available from United Kingdom production, whichever is the earlier date, the United States of America shall provide 1000 Mc/s. D.M .E . free of charge for use at designated international airfields in the territory of the United Kingdom to be agreed upon from time to Standardization of D.M.E. Civil aviation. Installatiioni by IT. S. Of U. K. tyip, etc. T. K. band beyond interference distance from U. S. Free D.M .E . 3131 October 13, 1947 IT. I. A . 8.1662]
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