Author(s): R. J. Holm
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 19, Number 2
Pages: 191 - 194
Cite this article: Holm, R. J., "GREAT CIRCLE WAYPOINTS FOR INERTIAL EQUIPPED AIRCRAFT", NAVIGATION, Journal of The Institute of Navigation, Vol. 19, No. 2, Summer 1972, pp. 191-194.
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Abstract: As introduced early in transoceanic flying, long before self-contained navigation systems were available, aircraft reporting points and navigation waypoints were selected at the even 10 degrees of Iongituded with traffic lanes 120 miles apart. The waypoints centered usually at even degrees of latitude when crossign a 10 degree meridian line. This was for the purpose of: 1. aircraft-ATC communications exhange for traffic control and advisories 2. weather information exchange in a common effort to establish and update aerology factors necessary both for DR steerign and aircrat safety. 3. selection of time-distance stages copatible with the work cycle of the aircraft navigator. In the earlier propeller adn turbine driven aircraft this work cycle consisted of working out one or more position fixes followed by DR steering corrections and ETA computatiosn to the next 10 degree waypoint.