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Forum: Navigation 05-10-2015, 10:21
Replies: 17
Views: 5,672
Posted By Jman
Re: DIY Tube Knot meter Plans ??

It is correct you gps gives speed over the water (or over ground depending on how you want refer to is). It does not give speed through the water. As you say it is affected by current as one example....
Forum: Navigation 05-10-2015, 09:21
Replies: 17
Views: 5,672
Posted By Jman
Re: DIY Tube Knot meter Plans ??

Because you care about the difference speed over the ground and speed through the water?


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