An Analysis of a Procedure for Conducting Instrument Approaches to Parallel Runways Spaced Less Than 5,000 Feet Apart

摘要

The report describes a feasibility analysis of a proposed procedure for conducting instrument approaches to parallel runways spaced less than 5,000 feet apart. A mathematical model which relates collision risk, size of aircraft, relative velocity, nominal separation and flight path variability is used to estimate longitudinal separation minima for various runway spacings less than 5,000 feet apart. Representative estimated values are: 4,000 feet runway spacing - 9,600 feet minimum longitudinal separation between aircraft on approach to adjacent runways; 2,700 feet runway spacing - 14,500 feet minimum longitudinal separation between aircraft on approach to adjacent runways. Some time relationships in the resolution of extreme deviation situations are also examined. Turning an avoiding aircraft from an intersecting course with an intruding aircraft can increase the potential hazard or risk. Considering the separations specified and the assumed times used for detection, clearance delivery, etc., it appeared better, in some cases examined, to allow both of the aircraft to proceed on course without any intervention. More extensive study of deviation situations which include measures of pilot, controller, and equipment complex performance is needed. (Author)