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Aprašymas

This fascinating antiquarian volume contains a comprehensive exposition of the elementary principles of celestial navigation, including information on the fundamentals, procedures and their problems, practical points, essential equipment, and much more besides. Written in clear, concise language and containing a plethora of helpful illustrations and tables, this text will be of considerable utility to the novice astrologer, and will also be of use to those with more experience as a reference book. The chapters of this volume include: Astronomical Time, The Nautical Almanac, Altitudes, The Sextant, The Compass, The Astronomical Triangle, Trigonometry, Logarithms, Introduction to Position Finding, Latitude, Longitude and Chronometer Error, Azimuth and Compass Error, et cetera. This book was first published in 1944, and is being republished now complete with a specially commissioned new introduction.