Bod
regular
Reged: 10/11/2003
Posts: 11
Loc: South Coast
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Well its a slow day and I'm bored. Assuming a triangular wave I reckon:
distance actually travelled = DOG +(wavelength^2+waveheight^2)/(wavelngth)
So 20m between peaks and 2m height gives about an extra 0.5% of distance over ground, whereas a 3m height an extra 1.1% distance....
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Wiggo
regular
Reged: 10/09/2003
Posts: 3304
Loc: (State, Country, etc.)
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That was the point, I think.
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The nicest thing about not planning is that failure comes as a complete surprise, and is not preceded by a period of worry and doubt.
Nereid Charter
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hlb
regular
Reged: 16/05/2001
Posts: 17249
Loc: Any Pub Cornwall or Devon
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So your saying, over say 100 miles, it only makes .5 or 1 mile difference?? dont seem much does it. would have thought much more than that. But what about swell we get loads down the SW, maybe going up and down 10ft.
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Haydn
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houghn
regular
Reged: 20/04/2004
Posts: 2716
Loc: Birmingham-sur-Mer
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With a triangular wave, 20m between peaks, and 2m wave height, split the wave into two right angle triangles, hypotenuse is the root of the sum of other two sides squared, gives 10.2, so its 2% extra distance
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Wiggo
regular
Reged: 10/09/2003
Posts: 3304
Loc: (State, Country, etc.)
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OK, so that's 3m rather than 2, but the wavelength is huge, innit? Maybe 200m between wave crests, so still only 2%
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The nicest thing about not planning is that failure comes as a complete surprise, and is not preceded by a period of worry and doubt.
Nereid Charter
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Divemaster1
regular
Reged: 15/01/2002
Posts: 1588
Loc: Scotland
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You'll add more than 2% by course deviation I'd guess ..... as in up/down plus the zig/zag part ...
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Regards, Alf
"The only time you have too much fuel is when you're on fire."
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