MacDonald, Alexander Forsyth, 1897-1965 · Port Credit, Ont. : Aviation Service Corporation · leaf 113
by electric im-pulses which will be transmitted directly to the auto-matic pilot. One advantage of the GCA system is that it doesnot require heavy complicated equipment in the air-craft. A radio receiver and normal flight instrumentsare all that are required. The GCA system can be used (i) to lend… … Fig. E. GCA Scanning Screens. Right: The SURVEILLANCE SCREEN. Circular tines are 5miles apart. The pips are aircraft. The radar surveillanceantenna, rotating through 360°, scans a radius 30 miles out and10,000 feet up. Position of every aircraft within a 2,800 square-mile area is continuously…
Airplanes
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