The natural Navigation: The Right Course, Naturally

In this photo, one of the Outward Bound Oman instructors, who I visited recently, is being taught how to use a traditional and beautifully simple navigational instrument called a ‘kamal’.

This instrument is as simple as they get: it works by forming a triangle. If you know the base of a triangle (the fixed length of twine from eye to instrument) and you know the height of the triangle (the number of fingers counted up from the horizon), then you have a fixed angle to the horizon. This is the ancestor of nearly all navigational instruments prior to electronics. (In fact the triangulation used has a lot in common with the way GPS works, but that is another story.)

How does it work in practice?

Here’s the simplest example: the Pole Star (Polaris, North Star) will be the same angle above your horizon as your latitude. At the North Pole…

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It has been quite a restless few days.

Last Saturday I spent the morning in London as a guest on BBC Radio 4′s Excess Baggage. In the evening  I led a group on a night walk. The conditions were perfect. We watched as blue turned to orange. Then as the orange faded to dark blue and black we were treated as Arcturus, Deneb, Altair, Vega, Capella and others began to appear. Lurking luminously between the silhouetted branches of a two hawthorns there was a bright white light in the east. It refused to move or twinkle. It wasn’t an aircraft or a star, it was Jupiter rising to rule the sky. We looked at five different methods for finding the North Star.

Thank you to all 400 who came to a Night of Adventure in Bristol on Monday. Great cause, great audience, fun night. If this night comes to…

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A blog of two halves for you today.

Late September can bring some of the best early evening experiences for those who enjoy looking upwards.

Visibility is likely to fluctuate a bit, but it looks as though we may get some of the best stargazing weather of the year over the next few nights. It promises to be warm enough to enjoy long spells outside, but without the crazily late sunsets of midsummer.

I’ll point out a few of the things worth looking for in a minute, but first just a few words about this weather.

On my courses I encourage people to take note of shifts in wind direction and how this relates to changes in weather patterns. If the weather is unseasonably warm or cold, we should expect some deviation from the prevailing wind direction, southwest.

The image above shows the UK (at lunchtime tomorrow) sandwiched neatly between…

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Finding South Using the Stars

In the northern hemisphere Polaris, the North Star, tends to get all the attention when it comes to finding direction using the stars. There is a good reason for this: it is easy to find and is very accurate. In the southern hemisphere the Southern Cross is used to find south and Polaris is not visible. But what about finding south in the northern hemisphere? The easiest thing is still to find Polaris and then look in the opposite direction, but what if we want a method that actually shows us south itself. Here is a nice simple and very unusual method that I invented a few years ago, which you can try this evening.

First you need to find the constellation Leo. It is a nice, big and easy to identify constellation which, unlike some constellations I can think of, looks at least…

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Last night was the inaugural meeting of the Night Navigators Club. This is a ‘loyalty club’ for all those who have been on any one of my courses in the past – or those who come on one in the future.

For three years I have been pondering how to solve a tricky riddle. There are so many people who would love to learn about the night sky, but it is very hard to organise an outdoor course for this in this country because the weather is so unreliable. I need to sort the dates for my courses at least a few weeks in advance and it is impossible to predict the conditions that far away. Also, the best times of the year for star, moon and planet-gazing are not the best times for weather. Mid-summer is great for many outdoor activities, but with the late sunsets it is not…

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My thanks to Stuart Goring for sending over these great Thomas Hardy celestial quotes. Those who know this blog or my book will be aware that I love it when nature and the arts come together. The two following excerpts are taken from ‘Far From the Madding Crowd.’

“He stood and carefully examined the sky, to ascertain the time of night from the altitudes of the stars. The Dog-star and Alderbaran, pointing to the restless Pleiades, were halfway up the Southern sky ,and between them hung Orion, which gorgeous constellation never burnt more vividly than now, as it soared forth above the rim of the landscape. Castor and Pollux with their quiet shine were almost on the meridian: the barren gloomy square of Pegasus was creeping round to the north-west; far away through the plantation Vega sparkled like a lamp suspended amid the leafless trees, and Cassiopeia’s chair…

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After an enjoyable private course on Friday – we finished standing in a field looking at Orion, the Plough, Cassiopeia and, of course, Polaris – it was time for a family outing to West Wittering beach early on Saturday.

I adore the Witterings in winter, the barbecue and beach towels may have to stay at home but it is invigorating to get blown along on miles of abandoned sand. In between games of hide and seek amongst the beach huts, games of football on the sticky sand and races to pieces of seaweed, I noticed some interesting patterns in the sand.

This photo shows how there tend to be broad ripples parallel to the coastline itself, but closer inspection reveals more subtle patterns and these can be used to decipher the action of the water and therefore yield more clues to direction. The ripples of sand fan out over…

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Northern natural navigators look at the Plough pretty much every night that is not completely overcast and yet we could argue that it gets overlooked. As the best known signpost for the North Star, our eyes tend to jump to its seven stars, line them up and then move on from the pointers to that friendly star, Polaris.

This morning I thought it would be nice to give it credit for being more than just a signpost. It is Ursa Major, the Great Bear and has featured in literature and art for as long as words and pictures have been recorded. Homer, Shakespeare and Van Gogh have given it the time of day.

The first thing we can do if we want to give it a second thought is to look to the middle star in the Plough (saucepan to some) handle. This can be seen clearly as a double…

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