## American Practical Navigator |

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### Contents

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### Common terms and phrases

adjustment angle anil apparent altitude azimuth bearing calculated Cape central index centre chronometer circle column compass Corr corresponding Cosec cosine degrees diameter diff difference of latitude difference of longitude Disl Dist divided draw elapsed equal equator error EXAMPLE feet given Greenwich half Half-sum height horizon glass hour angle hypotenuse instrument latitude and departure line of numbers logarithm lower limb lunitidal interval mean meridian altitude meridional difference method middle latitude miles minutes moon moon's multiplied Nautical Almanac nearly noon object observed altitude obtained parallax parallel passing the meridian perpendicular Plane Sailing points polar distance pole quadrant radius 90 refraction right ascension rule screw sea account secant sextant ship side star subtracted sun's declination Suppose Table taken tangent telescope tlie transit triangle true altitude true distance variation wires zenith distance ВС