Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 92
Fig. G6 In Parallel Sailing a vessel is supposed to sail due east ordue west. The distance sailed is the departure made; andthe difference of longitude is found as follows: 116. Given the departure between any two meridians atany latitude; find the difference of longitude of any point onone…
Trigonometry · Surveying · Navigation
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