INTERNATIONAL AGREEMENTS OTHER THAN TREATIES [61 STAT. 6. This understanding is entered into without prejudice to transfer, operation, maintenance or installation of any additional aids to civilian aviation which the United States may deem to be desirable in the United Kingdom. If you will indicate your acceptance of this understanding, I think that we may consider it to be effective as of the date of your acceptance. Sincerely, W. A. HAmRIAN The Rt. Honorable LoaD WINSTER, J. P., Minister of Civil Aviation, Ariel House, The Strand. The British Minister of Givil Aviation to the American Ambassador MINISTrY OF CIVIL AVATION, AarL HOUSE, STRAND, LONDON, W.C.2. 81st July, 1946. MY DEAR AMBASSADOR, I am sorry that my reply has been so long delayed to your letter of 8th May, in regard to the transfer to the United Kingdom Govern- ment of certain air navigational and operational facilities which were installed in the United Kingdom by the United States Armed Forces during the war. The subject of the provision or maintenance of such types of navigational aids has recently been under discussion in P.I.C .A .O ., particularly at the Regional Conferences which have been held at Dublin and Paris, and I have been anxious that our arrange- ments should conform to the general agreements that have been reached. 2. For convenience of reference I am attaching copies of the relevant recommendations from the P.I .C .A.O . documents. 3. In general, the position is that the United Kingdom, in common with other countries, have undertaken to retain or install the "P.I.C .A .O . Standard Instrument Landing System" at international airports; and so far as existing radio ranges are concerned, to retain on low power the ranges used for approach purposes at such airports until the latter are equipped with the P.I.C.A .O . Instrument Landing Sys- tem and the aircraft concerned are equipped to use it. Accordingly I AtI*, 09. suggest that the first paragraph in Section 5 of your letter should be re-worded on the following lines:- "The UJ. Government will continue operation of the above de- scribed installations in accordance with the requirements of interna- tional civil aviation until such time as the aerodromes concerned can be equipped with alternative P.LC.A.O. Instrument Landing Systems as agreed at the PI.C ..O . North Atlantic and European and Mediterranean Regional Conferences in Dublin and Paris. Th 4010
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