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A Pragmatic Approach to “Zero-Zero”
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English
Abstract
“Zero-zero” is the ultimate goal of any so-called all weather program. Weather histories at several major airports in the U.S. are analyzed to determine how much gain may be expected with achievement of 100-1/4 minimums, and finally “zero-zero.” The cost of lost revenue due to diversions is compared with the cost of today's radio equipment. Estimates of future costs are made, and the resulting curve extrapolated to determine the point of maximum economic gain during the pursuit of lower weather minimums. The philosophy of instrument approach operation is discussed.
A study is made of the development of United Air Lines' present instrument approach practices, and is combined with certain facts and opinions of the author to show that there are two answers to the “zero-zero” problem: automatic landing or a “real world” instrument presentation. The various advantages and disadvantages of each solution are discussed, with the conclusion that the attainment of minimums below the safe go-around altitude of the particular airplane involved will require a fundamental change in the instrumentation provided to the flight crew.
Authors
Citation
Collins, R., "A Pragmatic Approach to “Zero-Zero”," SAE Technical Paper 640523, 1964, https://doi.org/10.4271/640523.Also In
References
- “The History and Status of Artificial Fog Dispersal,” UAL Special Studies #110 January 6 1964
- “Lower Minima Program,” UAL Report FO-57
- “Statistical Significance of Lowering Minimums From 200-1/2 to 100-1/4,” UAL Special Studies #108 December 19 1963
- “Irregular Operations Causes and Costs,” Report IE-232 UAL May 14 1963
- “Incidence of Low Ceilings and Low Visibility in the U.S. Pacific Coastal Regions,” U.S. Weather Bureau Report No. 720