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 100
rc of the horizon intercepted between the vertical circle passingthrough the body, and the point of origin. It is reckoned toward east or west, according as the body is east or westof the meridian, hence through iSc-. It is defined by prefixing the letter denoting the point of origin, and affix-ing… … 68 NAUTICAL ASTRONOMY. to the east or west points, and that measure called the Amplitude. A body in the horizon, whose azimuth isN. 60° E., would have an amplitude of E. 30° N. WH would be the amplitude of O in the horizon. The Altitude of a heavenly body is the arc of the vertical circle passing…
Navigation · Nautical astronomy
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