A Treatise on Navigation and Nautical Astronomy |
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Common terms and phrases
apparent altitude astronomical azimuth calculated celestial concave celestial meridian centre chronometer showed colatitude compass course corr course and distance decl deviation dist earth east ecliptic equal altitudes equation equinoctial Examples feet given Greenwich date Greenwich mean heavenly body height of eye horizon hour angle incr index correction Inman's Tables interval lunar magnetic course mean noon mean solar mean sun mean time nearly measured Mercator's chart meridian altitude method miles minutes of arc moon moon's Nautical Almanac navigation observed altitude P.M. mean parallax parallel Parallel sailing plane point of Aries polar distance pole position prime vertical refraction represent Required the latitude rhumb line right ascension sailing semidiameter sextant ship mean ship's head sidereal star star's taken tion triangle true altitude true bearing true course true distance variation vers vessel west of meridian zenith distance