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 Pillars of the Sky (Learning from the Polynesians).
 Survival – The Star Compass (Learning from the Polynesians)
 Astro Navigation In A Nutshell Part Four
 Astro Navigation In A Nutshell Part 1
 Astro Navigation In A Nutshell Part 2.
 Astro Navigation in a Nutshell Part 3
 Applying the Equation of Time when calculating longitude at the Sun’s Meridian Passage.
 Short Distance Sailing And Rhumb Line Sailing
 Meridian Passage Long Method
 Meridian Passage Short Method
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Tag Archives: mathematics of astro navigation
Astro Navigation In A Nutshell Part 2.
Part 2 – The Intercept Method Link: Astro Navigation In A Nutshell Part One Suppose we are in a yacht and we measure the altitude of the Sun and find it to be 35o; what does this tell us? All … Continue reading →
Calculating Azimuth And Altitude At The Assumed Position By Spherical Trigonometry.
There are several ways of calculating the azimuth and altitude at the assumed position; these include the use of sight reduction methods and software solutions. However, the traditional method is by the use of spherical trigonometry which is demonstrated below. … Continue reading →
Survival – Calculating Altitude Without An Angle Measuring Instrument
Links: Astro Navigation in a survival situation. Latitude from the midday Sun. Find your longitude. Calculating declination. Declination table. Trig table. Revise trigonometry Revise Spherical Trigonometry As the above links demonstrate, there are several methods of employing astro navigation … Continue reading →
The Rhumb Line
If a ship were to steer a steady course, that is one on which her heading remains constant, her track would cut all meridians at the same angle, as the following diagram shows. Such a line on the Earth’s surface … Continue reading →
Posted in astro navigation, navigation

Tagged astro navigation, celestial navigation, mathematics of astro navigation, navigation, rhumb line

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Astro Navigation – What is it and why do we need it?
Astronavigation (or celestial navigation as it is also known) is a fascinating subject that encompasses many areas of knowledge including geography, astronomy, history and mathematics. As you unravel the principles and techniques upon which navigation is based, you will be … Continue reading →
Posted in Astro Navigation Topics, Schools

Tagged amazon, astro navigation, book, celestial, celestial navigation, celestial navigation for dummies, celestial navigation made easy, celestial navigation training, eBook, global positioning system, GPS failure, mathematics of astro navigation, mathematics of celestial navigation, navigation

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Distance to the Horizon
The Pharos Lighthouse. The Pharos Lighthouse or the Lighthouse of Alexandria as it was also known, was commissioned by Ptolemy Soter the ruler of Egypt and completed during the reign of his son Ptolemy II in about 270BC. It was … Continue reading →
Revise Pythagoras’ Theorem
If after reading some of my other posts, you feel you are a bit rusty on Pythagoras’ Theorem, here is a quick brush up for you. We can see in the diagram below that, in the triangle ABC, if a … Continue reading →