LONGITUDE BY LUNAR OBSERVATIONS AND THE POCKET CALCULATOR

D. W. Kerst

Peer Reviewed

Abstract: Finding longitude by lunar distance observations with the formerly lengthy data reduction is simplified with a pocket calculator method described. Such calculators are coming into use for small boat navigation. In contrast to the recent lunar altitude methods using LOP constructions, which attracted navigators, it is free from the serious plotting and horizon inaccuracies. Because of the number of keystrokes, the calculator should use a recordable program. In the event of lost radio or chronometer time, the method can approach an RMS longitude accuracy of -+8 minutes.
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 25, Number 4
Pages: 430 - 433
Cite this article: Kerst, D. W., "LONGITUDE BY LUNAR OBSERVATIONS AND THE POCKET CALCULATOR", NAVIGATION, Journal of The Institute of Navigation, Vol. 25, No. 4, Winter 1978-1979, pp. 430-433.
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