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Tuesday, November 10, 2009

Lows and highs part 1

0700/10th position 1526 02456 trip 133/24 2595 to Cape Town

Still a'hooning, heading south along longitude 24.58 W to get down to where we hope the back of the high will be. To continue yesterday's explanation for the non-sailors, south of about 35 degrees the westerly winds begin - you're in the top of the roaring forties. in the forties, a line of low pressure systems tramps around the globe at various intensities and frequency. A southern hemisphere low rotates clockwise and draws air in towards the centre - think water going down a plughole - and the closer you are to the left front quadrant of the system you are the stronger the wind. The combination of the anticlockwise high to the north and the clockwise low to the south tends to promote and intensify the westerly winds where the two meet and the trick for us is to trek along the bottom of the high and the top of the low.

More on this later - must send it and get on with ritual. Post on ritual to follow too.