IN THE CONTROL TOWER OF THE AIRPORT
The great airl'ort is in frequent wireless communication Before a plane may take off from the aerodrome it must with other air and .meteorolo~ical stations and with .receive路a light signal to do so flashed by this lamp, machines in flight. Here are wiTeless operators at work. which is sighted on the pilot, from the control tower.
Wireless messages give the whereabouts of machines flying between London and the Continent, and it is the duty of the control officer to keep a note of their progress by marking their positions with little flags on a large map. 437