ICAO Journal

No. 4

Approved last year for use in commercial passenger aircraft, the enhanced GPWS developed by AlliedSignal displays the location of threatening terrain. Our cover photo was taken on an Airbus A320 shortly after take-off southbound from San Francisco, with the EFIS range set to 160 NM. Red areas represent terrain that is 2,000 feet above the aircraft. Yellow indicates terrain that is 1,000 to 2,000 feet above.