A review of radio aids in aviation

The object of this paper is to outline how radio is applied to assist aviation. The main technical problems peculiar to this branch of radio are dealt with in detail. Some radio aids are analysed from the technical and economical aspects and it is shown that many of them are now outmoded by wartime developments. Whilst the paper is essentially concerned with civil aviation, some reference to military technique is inevitable because many wartime aeronautical requirements are a guide to civil aircraft of the future. Certain requirements are suggested, such as a radio collision warning device and electronic flight instruments.