Text-book on Navigation and Nautical Astronomy |
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Aldebaran altitude artificial horizon August B.Sc bearing by compass Bearings of distant blue pole centre chart CHEMISTRY chron chronometer circle coefficient comp compass bearing Compass courses correct magnetic bearing cosec course and distance Crown 8vo D.Sc declination deviation Diagrams diff distant object ELEMENTARY Find the course Find the lat Find the latitude Find true Fomalhaut G.M. noon given Greenwich heeling error height of eye hour angle Illustrations latitude longitude magnetic courses mean meridian Meridian Altitude miles Moon Moon's Nautical Almanac needle observed P.M. at ship parallel parallel sailing Pegasi plane right angles Right Ascension sailing September set and drift sextant ship's head showed side Sidereal slow Spica standard compass star steering sub-permanent magnetism subtract Sun's Table true azimuth true dist variation vertex