I reckon that, all things being equal, and especially if the wind velocity and the captain's age do not change, you might well be right !!
<img src="images/graemlins/grin.gif" alt="" /> <img src="images/graemlins/grin.gif" alt="" /> <img src="images/graemlins/grin.gif" alt="" /> <img src="images/graemlins/grin.gif" alt="" />
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Alain