[Coffin, John Huntington Crane], 1815-1890. [from old catalog] · New York, D. Van Nostrand · leaf 16
hese formulas accord with the precepts on page 50 ofBowditchs Navigator. 3. If the distance is very small, so that the curvature ofthe earth may be neglected, then C A may be regarded as aright line, and the triangle C A B as a right plane triangle.From this we have cos Cr = Bin tan <7=4f; I or,… … PLANE SAILING-. 9 in which p is the departure in the latitude of C or A ; indif-ferently, as their distance is very small. The Traverse Table, or Table of Right Triangles, containsI and p for different values of C and d. Table I. in Bow-ditchs Navigator contains I and p for each unit of d from 1to…
Navigation · Nautical astronomy
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