6a supp
Item No. 6a_supp Meeting Date September 12, 2017 Ground Based Augmentation System (GBAS) 1 GBAS Location Location Seattle Tacoma International Airport Site Map 2 GBAS System How it works 3 Instrument Landing System (ILS) First installed in 1940 ILS is a combination of radio signals and lighting systems that provide horizontal and vertical guidance. DC-3's carried 75% of passengers in 1940 Instrument Landing System History 4 Why GBAS? Why Now? A proven technology. Existing Instrument Landing System is affected by objects in close proximity, GBAS does not have this limitation. Aircraft increasingly come equipped with GBAS Landing System technology. Airlines want GBAS. FAA Air Traffic Control Tower endorses GBAS installation. Free upgrade by Honeywell leverages the Port's investment. Future environmental benefits. Keep current with technology 5
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