On the Distribution of the Accuracies of Noon Position by Loran C and Sun-Run-Sun's Meridian Altitude in the Pacific Ocean

Abstract

First, the writer drew the contours of constant probability density of Sun-Run-Sun's Meridian Altitude on the Mercator chart, and, using the chart, made a serviceable diagram showing the most suitable time for a morning sun sight for navigators. Secondly, supposing that the navigator had made the morning observation at the most suitable time, the writer drew parallels of the constant probability density of Noon Position on the ditto chart, and by comparing these of Loran C fixes with the previously mentioned parallels, the writer tried to make a practical chart by which navigators could select the appropriate triplets of Loran C stations or Sun-Run-Sun's Meridian Altitude to obtain the most accurate Noon Fix in the Pacific Ocean.