Lambert conformal conic projection and astronomical navigation.

Abstract

Characters of celestial line of position plotted on chart of Lambert conformal conic projection, e. g. ICAO WAC one millionth, are investigated. Error of length of the intercept caused by neglect of change in the magnification along meridian, error of the position of intercept terminal caused by the difference between straight line intercept and great circle intercept, and error of the direction of position line due to the convergency of meridians give final effect of less than second order infinitesimal to the position of ship or aircraft, and are practically negligible even in high latitude or for high speed air navigation, in which cases the ordinary position line on Mercator chart gives serious error.