Tag Archives: survival

Astro Navigation In A Survival Situation

Posted on January 8, 2012 by Jack Case

In a recent survey, the majority of people questioned were surprised to learn that astro navigation can be used in a survival situation.  In the same survey, 60% said that they would use satellite navigation systems to find their way … Continue reading →

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Finding Latititude In A Survival Situation.

Posted on January 8, 2012 by Jack Case

The  full method of calculating your latitude from the altitude of the Sun can be found at this link.  However, in a survival situation, the following simplified method can be used. Equipment Needed.  A clinometer or other device for measuring angles. … Continue reading →

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Finding Longitude In A Survival Situation.

Posted on January 8, 2012 by Jack Case

We know that the Earth revolves about its axis once every 24 hours.  In other words, the Sun completes its apparent revolution of 360o in 24 hours.  This means that the Sun crosses each of the 360 meridians of longitude once … Continue reading →

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Latitude from Polaris

Posted on January 8, 2012 by Jack Case

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 →

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Declination Table For Survival Use

Posted on January 8, 2012 by Jack Case

Sun’s Declination Table constructed for use in survival situations to be used when calculating latitude from the altitude of the midday sun. Provided by Astro Navigation Demystified (www.astronavigationdemystified.com) The following table shows the mean values of the declination of the … Continue reading →

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How To Make A Mini-Clinometer For Survival Use

Posted on January 8, 2012 by Jack Case

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 ‘mini-clinometer’ as shown below, … Continue reading →

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Latitude from the Midday Sun

Posted on January 8, 2011 by Jack Case

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 →

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