[Coffin, John Huntington Crane], 1815-1890. [from old catalog] · New York, D. Van Nostrand · leaf 20
nce of longitude of the same meridians, on the equator A Ca whose radius is O A = 0 A = JR. A C, A! C are similar arcs of two circles, and are there-fore to each other as the radii of those circles; that is, A C : A C = B A : O A, or p:D = r: JR. In the right triangle O B A, B A = O A X cos O A B,… … 14 NAVIGATION. p : D = cos L : 1, or p — D cos Z, D — p sec X, (5) which express the relations required. (Bowd., p. 63.) These relations may be graphically represented by a rightplane triangle (Fig. 4), of which I) is the hypothenuse, L, one of the angles, p, the side adjacent that angle. The…
Navigation · Nautical astronomy
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