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 The Celestial Coordinate system.
 What’s The Point of Astro Navigation When We Have The GPS?
 Calculating Changes in Longitude and Time Along a Parallel of Latitude.
 The Importance of Azimuth and Altitude in Astro Navigation
 Bearing, Azimuth and Azimuth Angle.
 A Plan Of Mathematical Perfection. (Learning from the Polynesians)
 Pillars of the Sky (Learning from the Polynesians).
 The Polynesian Star Compass (Learning from the Polynesians)
 Astro Navigation In A Nutshell Part Four
 Astro Navigation In A Nutshell Part 1
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Category Archives: Schools
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

Tagged astro navigation, celestial navigation, Meridian Passage, navigation, Rhumb Line Sailing, Short Distance Sailing
Survival – Finding Direction From The Moon.
Just as the Sun can help us to find our general bearings during the day, so can the Moon at night. Moonrise and Moonset. As in the case of the Sun, the Moon will rise between north east and south … Continue reading →
Posted in astro navigation, astronomy, celestial navigation, navigation, Schools, Survival

Tagged astro navigation, celestial navigation, survival, survival  astro navigation
How To Locate The Pole Star (Polaris)
First step – Look in the northern sky to find the constellation Ursa Major which is otherwise known as the Great Bear. Second step – find the Big Dipper (marked in red) which consists of the seven brightest stars of the constellation … Continue reading →
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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Latitude from Polaris
Using The Pole Star (Polaris) To Find Your Latitude Assume that the Pole Star (Polaris)is exactly in line with the Earth’s axis produced, as shown in the following diagram. To an observer O on the Equator (lat. 0o) the Pole … Continue reading →
Posted in Astro Navigation Topics, navigation, Schools, Survival

Tagged amazon, astro navigation, book, celestial, celestial navigation, celestial navigation for dummies, celestial navigation made easy, celestial navigation training, eBook, mathematics of celestial navigation, navigation, survival, survival  astro navigation, survival  navigation

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Spherical Trigonometry Introduction
In the diagram above, the inner circle represents the Earth and the outer circle represents the celestial sphere. Point N represents the North Pole, B represents an observer’s position on the surface of the Earth, and U represents the geographical … Continue reading →
Posted in Astro Navigation Topics, Schools

Tagged amazon, astro navigation, astronomy, book, celestial, celestial navigation, celestial navigation for dummies

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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 →
How To Make A MiniClinometer For Survival Use
A clinometer is a simple device that can be used to measure the altitude of an object. Despite its simplicity, a clinometer provides a level of accuracy sufficient to measure angles to the nearest degree. A ‘miniclinometer’ as shown below, … Continue reading →
Posted in Schools, Survival

Tagged astro navigation, celestial navigation, navigation, survival, survival  astro navigation, survival  navigation

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Latitude from the Midday Sun
Finding Your Latititude From The Midday Sun. The following diagrams will help to explain how the latitude can be calculated from the Sun’s midday altitude and its declination. In the following diagram , NOS represents the horizon and O represents … Continue reading →
Posted in Astro Navigation Topics, Schools

Tagged astro navigation, celestial navigation, navigation, survival

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