8:57 PM Mon 5 Jul 2010 GMT
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'Slowly round, nice and easy - gives your crew time, and keeps up the boatspeed'
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Here Grant Headifen discusses the theory of changing course by tacking in the fastest, neatest possible way - relevant for every sailor, whether cruising or racing, and no matter how many crew you have: I once sailed with an ex-submarine captain who would always turn the boat through a tack extremely slowly. When a crew mate asked why, he had three good reasons. (1) Look behind you as you come about. If you are leaving swirling water eddies behind the rudder, these are a sum of kinetic energy that was previously in your sailboat but has now been released to
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by Grant Headifen
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