Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 278
ture ofthe earth cannot be neglected. Let PCD (Fig. 8) represent a por-tion of the earths surface, P thepole, CA the ships track betweenC and A, PC and PD the meri-dians, and CD and BA the par-allels through (7 and A. Let CA be divided into parts Ch,hj, etc., so small that the curvatureof the earth… … gh + ij + = (0h + hj+ ) sin C. 16 NAVIGATION. Hence,Also, p = D sin C.Cg= Ch cos C,hi = hj cos C, (a) .-. (7# + hi + = (Ch + hj -f ) cos (7. Hence, From (a) and (b), sinO-P D cos C. D p = D sin 0 sinU cos () = ■=*, [1] D DDcosO, cosO [2] tanO = ^-,p = LrftanC,I/- P . ib) [3] These formulas are the…
Trigonometry · Surveying · Navigation
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
