Pan American's Building Block Approach to Reduction in Landing Minima 650240

Even as jet minima were being lowered to 200 ft and 1/2 mile, or a 2600 ft runway range, requirement for still lower operating minima was recognized. A study of the problem showed that there were several combinations of airborne equipment which would reduce the pilot's work load to the point at which this goal could be safely achieved. The FAA reflected this idea in AC 120-15, “Criteria for Approval of Category II Landing Weather Minima.” Therefore, Pan American endeavored to choose basic equipment for 1200 ft RVR operation that could be developed into a system capable of automatic touchdown -- the next goal.


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