SOME CONCEPTS FOR IMPROVING NON-PRECISION APPROACH GUIDANCE THROUGH USE OF ON-BOARD DATA BASES

E. O. Frye

Peer Reviewed

Abstract:	Only a small portion of the airports in the U.S. with relatively long, hard surfaced runways are served with a dedicated ILS or MLS installation, and roughly half of these have a VORiDME-based published non-precision approach. As a result, there is a great deal of interest in exploiting GPS and other precision navaids to provide this service. While GPS, and perhaps other navaids have the position fixing accuracy potential to support N-P approaches down to the near Category I level, dependable position fixing accuracy is only one of the two major factors which enter in to determination of a specified decision height. The other factor is means of using the basic position information in a manner which will allow the flight crew to conduct the desired approach safely. This paper presents some concepts for augmenting the information from a navigation system to yield a total approach control performance that can be compared in safety to that of a dedicated landing system. A key to accomplishing this is utilization of the equivalent of a computerized approach plate on board the aircraft to reduce the blunder potential in inserting the required flight path descriptions, and to yield improved visibility of the navigation situation during the terminal area maneuvering and final approach.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 31, Number 4
Pages:	316 - 328
Cite this article:	Frye, E. O., "SOME CONCEPTS FOR IMPROVING NON-PRECISION APPROACH GUIDANCE THROUGH USE OF ON-BOARD DATA BASES", NAVIGATION: Journal of The Institute of Navigation, Vol. 31, No. 4, Winter 1984-1985, pp. 316-328.
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