By the aid of plotting sheets now issued by the Hydrographic Office, the plotting of position lines has become a comparatively easy task and at the same time, because of the large scale on which these plotting sheets are constructed, the accuracy of the fix has been increased. Yet an opinion prevails that the point of intersection of two position lines should be calculated as well as plotted. In the case of finding by calculation the intersection point of position lines computed by the St.-Hilaire method, three or four methods have been devised. Among these may be mentioned those by Dr. Fulst and Professor Goodwin as being the simplest and perhaps the least complicated.
Method Of Calculating The Intersection Point Of St.-Hilaire Position Lines
By Ernest K. Roden