The mariners' handbook; a convenient reference book for navigators, yachtsmen, and seamen of all classes (1906)
International Correspondence Schools, Roden, Ernest Konrad, 1866-, International Correspondence Schools. Pocketbook · Scranton, Pa. : International Textbook Co. · leaf 155
nd compass azi-muths is the total error of the compass. True amplitude is the complement of the true azimuth;it is measured along the horizon from the prime verticaltoward north or south. Compass amplitude is the amplitude measured by theships compass; it is affected by variation and deviation.… … Equator Fig. 3 Declination is the angular distance of a body north orsouth frorri the celestial equator; it is measured by the arcof the hour circle passing through the object and interceptedbetween it and the equator. Polar distance is the distance of a celestial body from thenearer pole; it is…
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