United States leads all Europe in mileage flown at night; on 2700-mi. span between Atlantic and Pacific seaboards there are 887 individual lighted aids to air navigation; standard 4-in. rotating beacon for airports; radiophones and directional radio beacons constitute block system of air and put pilot in closer touch with operating department than are engineers on railroad trains; one pilot can talk to another 175 mi. away or to ground station 200 mi. distant.
Night flying with mail, express and passengers
Soc. Automotive Engrs. Jl
Society of Automotive Engineers -- Journal ; 25 , n 4
1929
3 pages
Article (Journal)
English
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