## New American Practical NavigatorU.S. Government Printing Office, 1874 - Nautical astronomy |

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### Common terms and phrases

adjustment angle apparent altitude azimuth bearing calculation Cape central index centre chronometer circle column compass Corr corresponding Cosec cosine degrees diameter diff difference of latitude difference of longitude Dist draw east elapsed equal equator error EXAMPLE feet find the course given Greenwich Half-sum height horizon glass horizontal parallax hour angle hypotenuse instrument latitude and departure line of numbers line of sines 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 Parallel Sailing passing the meridian perpendicular Plane Sailing points polar distance pole quadrant radius 90 refraction right ascension screw sea account secant semidiameter sextant ship side sine course star subtracted sun's declination Suppose taken telescope transit triangle true altitude true distance variation wires zenith distance