Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 297
age 118, Table IX., and opposite the departure 129.1 is distance 171,which is the difference of longitude required. 171 = 2° 51. To Plot the Courses.Let (7 (Fig. 16) be thecentre of a circle repre-senting the card of thecompass. Draw CA,N.W.from C, equal to 60, to anyconvenient scale. Makean edge… … Fig. 16, TEAVERSE SAILING. 35 rhumb of the compass diagram, and extend until the otheredge embraces B, and draw BD equal to 83. D will representthe position of the vessel. Upon CN produced let fall the perpendicular DF. ThenCFwill represent the total difference of latitude, CD the dis-tance made…
Trigonometry · Surveying · Navigation
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