The American practical navigator : being an epitome of navigation and nautical astronomy (1888)
Bowditch, Nathaniel, 1773-1838, United States. Navy Dept. Bureau of Navigation, Cooper, Philip Henry, 1844-1912 · Washington : Govt. Print. Off. · leaf 131
hefollowing manner: Let two observ-ers, one placed as high on the main-mast as he can conveniently be, andthe other on the deck immediatelybeneath him, observe, at the same in-stant, the altitude of the sun or otherobject that may be wanted, and let theheight of the eye of the upper observer above… … Fig. 64. CORRECTION OF OliSERVED ALTITUDES. 99 Thus, if the eye of the upper observer was 68 feet higher than that of the lower, and the two observed alti-liulcs of the sun 20^ o and 20^ 12, the distance of the land, in sea miles, would be 3.2. For 68 X 0.56 = 38.08,and this, being divided by the…
Navigation · Nautical astronomy
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