Celestial Navigation Tutorial - NavSoft
Using a Sextant Altitude The Concept Celestial Navigation Position Lines Sight Calculations and Obtaining a Position Correcting a Sextant Altitude Calculating the Bearing and Distance ABC and Sight Reduction Tables Obtaining a Position Line Combining Position Lines Corrections Index Error Dip Refraction Temperature and Pressure Corrections to Refraction Semi Diameter Augmentation of the Moon s Semi-Diameter Parallax Reduction of the Moon s Horizontal Parallax Examples Nautical Almanac Information GHA & LHA Declination Examples Simplifications and Accuracy Methods for Calculating a Position; Plane Sailing Mercator Sailing Celestial Navigation and Spherical Trigonometry The Concept of Using a Sextant Altitude Using the altitude of a Celestial body is similar to using the altitude of a lighthouse or similar object of known height, to obtain a distance.
Using a Sextant for Celestial Navigation The main difference using a star or other celestial body is that calculations are carried out on an imaginary sphere surrounding the Earth; the Celestial Sphere.
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