The natural Navigation: The Right Course, Naturally

The heat seems to have abated a little, but the sun has left its great big footprints all over the countryside. The baked earth is cracked and fissures run along paths and the edges of the fields, more on the northern side than the southern.

The grass of our garden lawn is doing its best to betray both the sun’s arc and the motion of the trees’ shadows during the course of the day. The lawn is a patchwork of varying shades of green and brown, but it is not random and tells a story of heat and shade that is rooted in the direction of the sun.

The sun has reached its northernmost bus stop, it has put on the handbrake for a second and has now, already, begun its journey back south.

At this time of year the sun lights up the countryside in early morning and late evening in a way that is unique. The light pours in from low in the northeastern and northwestern sky. This picture could not be taken at any other time, as the morning light is filtered through gaps in the woods to the northeast of where I live. It lights up strips and leaves the rest of the fields in shade.

A belated thanks to everyone who came to my talks and walks at the North Kent Walking Festival and the Travel Bookshop last week.

Only one of these compasses can be correct, since I took the photo in my garden in the south of England in April, not at the South Pole.

The stick’s shadow should tell you which compass is still accurate and also very roughly what time of day the picture was taken. Which compass is still working, why and when was the picture taken?

The answers will appear here after a few tantalising days!

There is a good photo of the Great Lettuce, Lactuca Virosa, with its leaves aligned north-south on the Adur Wild Flower website. If you do use this to find your way then make sure you don’t eat too much of it as it is reputed to have psychotropic qualities. You are likely to head off in the right direction, walk in a circle and then find yourself back in the same spot, shouting something like, ‘Great Lettuce, Batman!’ I digress.

Another cracking dawn. There were four Roe deer in our neighbouring field, but sadly they scarpered before I got to my camera. I don’t actually have a brilliant lens for wildlife, so you have been spared a photo of four brown smudges in a brown field.

Only a few days of this solar season left, the autumnal equinox is on 22 September. This means that in the UK there are only four more days when the sun will have any north in it at all for another six months. At times like this, close to the equinox, the point on the horizon that the sun rises changes by more each day than at any other time in the year.

A walk along the edge of Nutbourne marshes on the weekend was an early taste of real summer. A sunny May day often feels hotter than a midsummer one to me, perhaps because I have not yet acclimatised. There were thousands of midges and flies, swirling up from the drying seaweed to complete the sensation.

These two pictures show the same field and only two minutes of walking passed between each shot. It is late afternoon and one of these is taken looking north, the shadows falling to the east and right of each furrow ridge.

One of the keys to navigating with nature is appreciating scale. It is vital that we do not spend too much time focusing too narrowly or widely. In this photograph, taken in the South Downs on Monday, our eyes are naturally led to the fallen tree. It would be very easy to miss both a bigger clue to direction and a smaller one.

The heart of the tree is marginally closer to our side of the tree, which hints that we are south of it, looking north.

If we peer through the undergrowth and bare tree branches we can see that the land falls away to lower country in the distance. The South Downs are a predominantly east/west range of hills and so any time that we can see a long way down into lower land it suggests that we are looking north or south. The hills are also close to the…

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For the next six months the sun will always have some south in it when viewed from Britain. It will rise south of east and set south of west until the 20th March 2009. Its shadows must therefore always have some north in them. This picture was taken at 9.35 this morning, by which time the sun is fast approaching south-east and my shadow is well on its way to north-west.

Random fact for the day: sun compasses were still being issued to the military for the first Gulf war in 1991.

The Natural Navigator’s day often starts with a quick check that the sun is rising roughly where it should be – blog readers will be the first to know if it doesn’t! As this picture shows it is not always a chore and the time that our youngest is getting up each morning certainly helps make sure I’m ready.

This will be the last week this year when the sun rises north of east and its change as it heads south each morning (and evening) is at its fastest at this time of year.

Navigation may fill my working hours, but even I couldn’t pretend that it is a high profile topic. Last week however a story about cows pointing north and south started appearing everywhere, there is a good summary on the BBC website.
On Saturday the Times newspaper ran a main news story and editorial piece describing how GPS navigators are not getting the full experience and are being denied the benefit of the rich detail of traditional maps. They put it well, ‘Turn left on to the A303 for Andover, ignoring the ancient stones: those without a map may not know they are passing Stonehenge.’
Perhaps this mini-surge of interest is why they were kind enough to run a snippet about my courses too.