## A treatise on navigation and nautical astronomy: including the theory of compass deviations, prepared for use as a textbook at the U.S. Naval Academy (Google eBook) |

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### Common terms and phrases

apparent noon applied approximate April astronomical azimuth Bowditch chro chronometer circle coefficients column compass heading compass needle component computed Corr correction corresponding cosec course and distance curve declination determined difference of latitude difference of longitude earth and ship earth's easterly equal altitudes equation error fore-and-aft formula given Greenwich mean heavenly body horizontal force hour angle instant intersection interval latitude and longitude limb line of position longitude magnetic bearing magnetic course mean noon Mercator chart meridian altitude method miles minutes minutes of arc Nautical Almanac navigator North point obtained parallel plane polar pole prime vertical quadrantal deviation represented result rhumb line rhumbs right ascension sailing sextant sextant altitude ship swings ship's head sidereal sight South star starboard sun's tangent tion triangle true altitude true course tude versin zenith distance zero