A PASSENGER or freight‐carrying aeroplane without wireless will come to be regarded in much the same light as a ship without steering gear, and that time is probably not far distant. Wireless is to‐day accepted as being equally essential in air and marine navigation.
Crook, W.E. (1936), "Training Radio Operators: The Method of Producing Wireless Personnel for Civil Air Lines", Aircraft Engineering and Aerospace Technology, Vol. 8 No. 12, pp. 340-342. https://doi.org/10.1108/eb030131
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