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Old 11-03-2012
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Re: HMS Bounty in trouble...

Quote:
Originally Posted by preventec47 View Post
I worded that badly.

I should have said does not a 25 knot wind pushing over opposing 7 knot current
result in the same sea state as a 32 knot wind blowing over water
that is not moving. My use of the terms "calm seas" screwed up
the meaning.
Think about the relative densities - a cubic foot of air weighs about 1-1/4 ounces; a cubic foot of water weighs 64 pounds. Which one will push you about more? A 2-knot breeze won't even ruffle the hair on your head, a 2-knot current will move your boat and screw up your docking if you're coming into a marina. One of our Navy friends said that when you're trying to figure out which way you'll lie at anchor, it takes about 30 knots of wind to overcome 1 knot of current, though I assume that depends on the shape of your hull and your windage.
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