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post #6 of Old 08-12-2019
denverd0n
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Re: GPS determined speed

Well, I wouldn't say that SOG from a GPS is "not terribly accurate." For what it is, and understanding how it is determined, it is quite remarkably accurate.

On the other hand, I agree that it is not a great tool for adjusting sail trim. For that a traditional speed log is much better.
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