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Show First Air Traffic Control Tower r : "-rrrr ;j I CiZ 1 . 5 , 1 r,. t-j i nnrmi- n in..t.u.J,j,y.vA',A. -. . -v. t . The first air trailic control system, to regulate the taking off and landing of airplanes by means of a short-range voice radio transmitter to inform the pilots of ground conditions on the field, lias been installed at the Cleveland Cleve-land (Ohio) municipal airport by Maj. John Berry, airport manager. In add!- tion to regulating siiips in night by radio, the system includes a device by( which the positions of ail airline planes leaving or approaching Cleveland are. marked on a map and may be seen at a glance. All field boundary lights, obstruction lights, building lights and the lloodlighls are controlled from a switchboard in the tower where there is some one on duly every hour of the day and night. |