ADJUSTMENTS OF CELESTIAL MOTIONS FOR HIGH SPEED JET NAVIGATION

Major William A. Cohen

Peer Reviewed

Abstract:	As the years have passed since the first issue of the Institute's Journal was published, the manuscripts contained therein have become increasingly removed from basic navigation and the problems of the practicing navigator. In one sense, this is as it should be. Navigation problems have grown ever more complex, and complex problems often demand complexity in their solutions. However, lest it be forgotten that it is the navigator who actually practices the art and science of navigation, it must be remembered that the navigator still faces problems in his day to day work which circumvent the "black boxes" which are also tools of his trade. Such a probem for the aerial navigator is motion adjustments-adjusting lines of position accomplished celestially to a common fix time. In the past, many means were both available and suitable. The navigator could adjust for motions graphically on his chart, he could use the motion tables available in HO 249, or he could use some combination of these methods. As jet flight led to greater speeds, these methods became obsolescent. HO 249 tables were slow and did not meet the requirements of the accuracy demanded. Graphical solutions requireing the use of tabular information incorrect as to the aircraft's actual position caused star mis-identification when used to prepare the limited viewed periscopic sextant.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 12, Number 2
Pages:	164 - 170
Cite this article:	Cohen, Major William A., "ADJUSTMENTS OF CELESTIAL MOTIONS FOR HIGH SPEED JET NAVIGATION", NAVIGATION: Journal of The Institute of Navigation, Vol. 12, No. 2, Summer 1965, pp. 164-170.
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