Note link just below if you don't get an answer. My home page magazine articles, lectures. Anders Ansar, Kungsholms Str. Modified September 2000. You are visitor number 212 since Sept 2000.
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When wind speed increases most boats sail closer to the wind and the reading of an ordinary compass changes without a change in the direction of the wind. The Ansar compass automatically compensates for this. If the compass indicates e g Best Lift in light wind it will still indicate Best Lift if the wind gets moderate. Most sailing boats sail with an angle between tacks of some 90 degrees in light winds. When the wind is moderate this angle typically decreases to between 70 and 80 degrees, depending on the type of boat.