Although published as long ago as October, 1899, in the Annalen der Hydrographic und Maritimen Meteorologie* Dr. Fulst’s Table for finding the angle /? between the larger intercept and the intercept between the assumed position and the fix (the intersection of two lines of position) is practically unknown to the nautical world.
Although reprinted in Breusing’s Nautische Tafeln, 1909, and used in the German Merchant Marine to a certain extent, this valuable little table is not officially used in the German Navy, where the fix is determined by a special four-page table using Marcq St. Hilaire’s method in its original form, theoretically more exact, but presenting an unsymmetrical and less practical appearance.
Let us suppose, in Fig. 1, that 0 is the assumed position, OA(=Ah1) and OB(=Alu) are the intercepts or differences between the two calculated and true altitudes (A/i^A/i.,), AP and BP the lines of position, P the “ fix ” and OP the fix intercept.