Ok...great discussion, so let me get this...I understand that there is a difference between boat speed which may be aided or impeded by currents, but just raw speed GPS should be far more accurate. How long does it take to get from point A to point b and figure out is speed in knots based on that. That should never change...right? So a knot meter on a boat will tell you how fast the boat is moving (or more exactly how fast the water is moving past the boat) and will give you instant results in regard to sail trim. A GPS device should give you the actual speed, not boat speed.
S/V Cuajota - 1975 WD Schock Santana 30
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