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Aviation History
1950
1950 - 0119.PDF
I9 January 1950 79 suitable for light aircraft, as described above, are: — Aeronautical Radio Services, Ltd., Blackbushe Airport, nr. Camberley. Surrey; E. K. Cole, Ltd., Ekco Works, Southend- on-Sea; Ferranti, Ltd.", Hollinwood, Lanes; General Electric Co., Ltd-, Magnet House, Kingsway, London, W.C.2; Mar- coni's Wireless Telegraph Co., Ltd., Marconi House, Chelms- ford; Murphy Radio, Ltd., Welwyn Garden City, Herts; The Plessey Co., Ltd., Vicarage Lane, Ilford, Essex; The Romac Radio Corporation, Tfce Hyde, N.W.9. (Land, Air and Sea Instruments Co., Ltd'., Grand Buildings, Trafalgar Sq., Lon- don, W.C.2); Standard Telephones & Cables, Ltd., Connaught House, 63. Aldwych, London, W.C.2. There are a number of firms with facilities for carrying out installation work and obtaining approval, and in many cases, manufacturers have appointed official agents for sales and installation. Finally, we may add a further extract from the regu- lations : —• "... The aircraft shall carry at least one licensed flight radio operator qualified under the terms of his licence to operate, for the sending and receiving of morse or spoken messages, the radio apparatus with which the aircraft is equipped." The following Ministry of Civil Aviation pamphlets are concerned with radio operation, licences and instrument rating tests: — The Air Navigation Order, 1949, Rules of the Air. (Parti- cularly section 5, also note Regulation 24). Price 2s. Air Navigation (Radio) Regulations, 1949. (Particularly section 7.) Price 5d. Civil Aviation Communications Handbook (M.C.A.P. 5). New Edition. Price is 6d. The " Q" Code (as amended) (M.C.A.P. 1, 1946). Price is6d. Air Navigation Regulations (Instrument Rating: Section 13). Price is 8d. M.C.A.P. 56 Instrument Rating explanatory pamphlet. Price 6d. All the above booklets can be purchased from H.M. Stationery Office (York House, Kingsway, London, W.C.2). M.C.A.P. 56 contains a list of books recommended for study in connection with Instrument Rating ground examination. Some useful hints on future intentions are contained in M.C.A. Information Circular No. X05 of 1949 (obtainable from the M.C.A. at Ariel House, Theobald's Road, Ldhdon W.C.i) in which is outlined the policy underlying-JLhe velopment of basic control and navigational services in the United Kingdom during the next two or three years. It is stated that the use of the M.F. band for air-ground communications will contract rapidly, and that the provi- sion of V.H.F. radio-telephony equipment for airfield and approach communications at M.C.A. airfields is now vir- tually complete. V.H.F. D/F. will continue to be available for naviga- tional services at many airfields, but the ability to use this facility alone will not continue to be sufficient for air-traffic control purposes for flights under I.F.R. in controlled areas and zones associated with major airports. The minimum scale of airborne equipment will be V.H.F. R/T., M.F. receiver associated with D/F. facilities and V.H.F. Fan Marker receiver. On this subject the Circular states that it is intended progressively to extend the system of positive control of air traffic throughout the country. Regarding the use of V.H.F. R/T., the Circular says: — '' (a) For international flying it is highly probable that full operational flexibility will be achieved only if aircraft are capable of communicating on at least 19 frequencies. "(b) For flying within the United Kingdom it is probable that full operational use of all aerodrome, approach and en route facilities will be achieved only if air- craft are capable of communicating on as many as 10 frequencies. "(c) It must be stressed that these measures are essential for the safeguarding of individual aircraft in flight as well as being in the interests of general air safety. Consequently, aircraft which have less than full facilities will find their activities restricted to those routes on which their inadequate equipment will allow communications to be maintained." M.F. Receiver with Associated D/F.—The use of the M.F. band for navigational facilities (beacons, ranges, etc.) is increasing. More and. more facilities have to be com- pressed into the restricted frequency band and there is no doubt that the utilization of the M.F. navigational facilities will continue for a considerable time to come. On October 20th, 1949 a V.H.F. R/T. system on multi- carrier principle was originated as part of a plan to provide continuous two-way communication and D/F. cover for Great Britain, the Channel Islands and part of Northern Ireland. So far-the area covered stretches southwards as KLDyce (Aberdeen). (Left) Marconi AD97/I08 com- munications equipment in a Dove and (above) Marconi AO86 S.B.A. receiver and re- mote control. (Left) Direct mounting of a Plessey 6-channel V.H.F. set in a Gemini. (Right) Plessey P.T.R.6I set with remote con- trol and (below) the control box.
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