Show First Air Traffic Control Tower 4 t I Sv t ti G P Pp s p The first air traffic control system to regulate the taking ort oft and landing of airplanes by means of a short short range e voice radio transmitter to Inform the pilots of ground round conditions on the tile Held field line has been Installed l at the tho Cleveland Cleveland Cleve Cleve- land Ohio municipal airport by MaJ John terry Kerry airport manager In addition addi tion to rl regulating ships In flight by hy radio the system Includes a n device by which the positions of all airline planes leaving or approaching Cleveland lI are oro marked on n a map and may be seen at a 11 glance All field boundary lI lights obstruction lights building lights and the tho floodlights are controlled from a switchboard In III the tower where there Is some Borne one on dut duty every hour dour the day and night |