Yes - you need to know both for the full picture. This applies to airplanes too. If I am doing 100 knots airspeed at 3,000 feet and 100 knots at 1,000 feet I can't pick an altitude. With the GPS speed I can tell which altitude has the best tailwind or least headwind. With the GPS and speed through the water both displayed you can find the best wind and the least adverse current ;) Joe Della Barba
From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Curtis Sent: Tuesday, January 14, 2014 9:59 AM To: cnc-list@cnc-list.com Subject: Re: Stus-List Autohelm St4000 how it should work with the GPS That helps . I can understand why it is needed. it would be a great help to me . I do sail in the Beaufort / Broad / Morgan rivers more than anywhere else. I have to fight 7 to 9 foot tidal changes. I mentioned in a another post that I have been sailing real hard and doing real good with the water racing past the boat just to look at the GPS showing 3 knots. When I now I was doing at least 6 or 6.5? thanks This helps
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