THE TRUE DISTANCE AND AZIMUTH COMPUTER FOR POLAR NAVIGATION

Sheridan L. Hall

Peer Reviewed

Abstract:	The aeronautical charts which are presently available for long-range navigation in the polar regions are somewhat inadequate in several respects because of the characteristics of the projections on which the charts are based. Current charts are on either the Transverse Mercator or Polar Stereographic Projections for the area from about 70° latitude poleward, and on the Lambert Conformal Projection for the areas below 700. Thus flights to a pole, or in its vicinity, require at least two types of projections, providing that the point of departure is below 70° latitude. This further complicates the bookkeeping chores associated with grid navigation (polar mode) used in polar flying. The problems of trans-polar navigation are becoming even more Pressing as jet aircraft become faster, higher lying, and farther ranging.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 5, Number 8
Pages:	385 - 389
Cite this article:	Hall, Sheridan L., "THE TRUE DISTANCE AND AZIMUTH COMPUTER FOR POLAR NAVIGATION", NAVIGATION: Journal of The Institute of Navigation, Vol. 5, No. 8, 1957, pp. 385-389.
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