## American Practical NavigatorU.S. Government Printing Office, 1841 - Nautical astronomy |

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### Common terms and phrases

A A B B C C anchor angle apparent altitude apparent distance azimuth bearing cable calculated central altitude centre chronometer column compass corresponding Cosecant Cosine Cotangent course degrees Diff difference of latitude difference of longitude Dist equal equator error EXAMPLE feet Funchal given Greenwich Half-sum horizon glass horizontal parallax hour angle Hour P.M. hypotenuse instrument Latitude and Departure line of numbers logarithm lower limb M|Hour mean meridian altitude method middle latitude miles moon moon's Nautical Almanac nearly noon object observed altitude P.M. Hour A.M. parallel perpendicular Plane Sailing points polar distance refraction right ascension sea account Secant semidiameter sextant ship ship's side sine star subtract sun's declination Suppose taken tangent telescope triangle true altitude variation wind zenith distance