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Tag Archives: Meridian Passage
Applying the Equation of Time when calculating longitude at the Sun’s Meridian Passage.
Author’s Note: The original issue of this post was found to contain errors which have now been corrected. Many thanks to Jeremy Parker for bringing the errors to my attention. Although the imaginary Mean Time gives us an accurate measurement … Continue reading →
Short Distance Sailing And Rhumb Line Sailing
In my previous post about the meridian passage long method, I demonstrated how the ‘Short Distance Sailing Formulas’ are used to calculate a vessel’s position at meridian passage. I have since received several questions asking how these formulas allow for … Continue reading →
Posted in astro navigation, Astro Navigation Demystified, Astro Navigation Topics, celestial navigation, geometry, Marine Navigation, mathematics, navigation, Schools, spherical trigonometry, Topics For Schools, trigonometry
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Tagged astro navigation, celestial navigation, Meridian Passage, navigation, Rhumb Line Sailing, Short Distance Sailing
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Meridian Passage Long Method
Links: Understanding Meridian Passage, Equation of Time, Meridian Passage Short Method, Short Distance Sailing Formulae, What is the point of meridian passage? Zone Time, Local Hour Angle and Greenwich Hour Angle, Converting GMT to GHA … Continue reading →
Understanding Meridian Passage (Mer Pas)
Meridian Passage occurs when a celestial body crosses the observer’s meridian of longitude and at that instant, it will reach its greatest altitude above the observer’s horizon. The following diagrams will help to explain how the latitude can be calculated from the … Continue reading →
Astro Navigation Demystified 
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