The natural Navigation: The Right Course, Naturally

Tonight’s early evening sky is a feast of cloud types. Cumulus, passing low and darkened by the shade, perhaps the last of the fair-weather clouds for a bit. Higher there is cirrus, cirrostratus and altostratus all heralding the approaching warm front. Thrown in for a bonus there are some contrails from aircraft heading to and from the continent.

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.

A Lancaster uses the moon to navigate at Goodwood Revival last weekend. Maybe not, but nice shot by Ben Davis.

‘Sagur, a spirit and chief, lived on the island of Pulap with his daughter, Inosagur. As she bathed in the lagoon before the canoe house one morning, she beheld a rainbow. It became a spirit, Anumwerici, which came to her. The spirit had eaten all the inhabitants of Truk and Naminuoito; now he intended to eat the people of Pulap, too.

But Sagur told his daughter to fetch a little piece of taro and a small drinking coconut. Although Anumwerici complained this would not be enough, each time he tipped the cup containing the taro to his mouth it was refilled. the same thing happened with the drinking coconut. Anumwerici ate and drank his fill. Never, he said, had he been so satisfied.

In gratitude he taught Inosagur navigation. He placed her in a small coconut tree and by magic made it grow above the clouds. Inosagur could see all the islands,…

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My youngest son has added the word ‘moon’ to his vocabulary of about 7 words. It came as a bit of a surprise as I was in the kitchen early this morning when this strange sound, ‘za mooon’, kept coming out of his mouth. He took my hand, led me to the back door and then pointed up at the object in this photo, neatly solving the mystery of what ‘za mooon’ could possibly mean. Does this mean I might be bringing my work home with me too much?

At 15.44 (GMT) this afternoon the sun crosses the celestial equator. It is the autumnal equinox. What on earth has that got to do with the price of toast, I hear you ask. Well amongst other things it means that today is one of only two days this year that the sun rises and sets due east and west.

Equinox, mmm, equinox, lovely word. Did you know that it comes from the Latin words for ‘equal’ and ‘night’, because on the equinoxes everywhere in the world experiences the same amount of day and night-time?

Last night I was fortunate enough to be invited aboard HMS Warrior to give the after dinner speech to the Contessa 32 Association End of Season Rally. It was a fun evening that had at its heart some the best British maritime traditions. HMS Warrior was an extraordinary feat of engineering and, ironically, peacemaking. At the other end of the scale the Contessa 32 is steadily going about securing its own small place in our nautical heritage also.

Nice little mention in the Guardian today.

The forecast for this weekend seems intent on lulling us into believing that the summer has life in it yet, after weeks on the resuscitation table.

If we’re in the mood for deluding ourselves that there is more of this come, then the ‘Summer Triangle‘ is worth looking out for. It is a collection of three bright stars that are overhead near midnight in midsummer, but still clearly visible well through autumn and even into the early evening winter sky. It is not a constellation at all, but a nickname for the three brightest stars, Vega, Deneb and Altair, from three different constellations, Lyra, Cygnus and Aquila.

So, as the nights draw in and you find yourself shivering looking up, search out the ‘Summer’ triangle to warm you.

When talking about heat and wind in the context of chillies, there is a risk that we might start to think some very un-navigational thoughts…

… however, this is a risky business, so here are two jalapeno chillies. One lived its life in a south-facing greenhouse, the other lived near it, outside near a south-facing wall. They both received identical amounts of sunlight. They both grew in the same soil and received plenty of water. The only serious differences to their environments were the temperature and wind exposure.

It is not too hard to see that nature is quite fussy about its environment and it is this fussiness that can give us a helping hand. It is sometimes possible to deduce useful things about the elements from two examples of the same species. One big example of this can sometimes be found in the different look and feel of two sides of…

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