## American Practical NavigatorU.S. Government Printing Office, 1826 - Nautical astronomy |

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### Common terms and phrases

anchor angle apparent altitude arch bearing brace cable calculation centre co-sec co-sine column compass corresponding course degrees Diff difference of latitude difference of longitude Dist elapsed equal equator error EXAMPLE feet Funchal given Greenwich half sum haul helm horizontal parallax hour angle larboard Latitude and Departure lee-way line of numbers logarithm mast mean meridian altitude method middle latitude miles minutes mizen moon moon's multiplied Nautical Almanac nearly noon object observed altitude šil parallax parallel passing the meridian perpendicular plane Plane Sailing points radius refraction right ascension rope rule sails sea account secant semi-diameter sextant ship ship's side sine star star's staysail subtracted sun's declination sun's right ascension Suppose tack taken tangent topsail triangle true altitude true distance tude variation watch wind windward zenith distance