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Search took 0.00 seconds. Search: Posts Made By: rognvald
Forum: Navigation 05-10-2015, 12:28
Replies: 17
Views: 5,672
Posted By rognvald
Re: DIY Tube Knot meter Plans ??

PDA1
The knotlog Newhaul recommended is an excellent choice. We sailed with that exact device for several thousand miles on our first boat before we bought a GPS. The only problem with that...
Forum: Navigation 05-10-2015, 11:10
Replies: 17
Views: 5,672
Posted By rognvald
Re: DIY Tube Knot meter Plans ??

Teddy,
Not quite true. The Great Lakes do have wind-driven currents, tidal differences along the coasts due to direction and strength of the wind and we certainly have induced leeway when...
Forum: Navigation 05-10-2015, 10:10
Replies: 17
Views: 5,672
Posted By rognvald
Re: DIY Tube Knot meter Plans ??

Jman,
You can determine your exact speed over water from your hourly fixes by your GPS. Speed devices are notoriously innacurate and can be influenced by current, tides and leeway. When my...
Forum: Navigation 05-10-2015, 09:11
Replies: 17
Views: 5,672
Posted By rognvald
Re: DIY Tube Knot meter Plans ??

Sunbear,
Why do you need a knotmeter if you have a GPS?
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