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GPS question
Does anybody make a GPS unit that all it does is measure speed? I would like a small, portable unit to calibrate boat speedos.
Fred |
I have a little Garmin Etrex Legend that does a good job of giving me the speed. Its almost dead on from the tests I have given it. Not to mention its waterproof, and about 100 bucks!
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Radar guns work well if you just want speed over water.
Any cheap GPS should give you speed over ground, don't forget to account for currant... |
Uncorrected GPS can have positional errors of 3-10 m/sec. That is, the position reported could jump 3-10 meters in a second. If you need accuracy you are better-off with laser or Radar.
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I was hoping to find a tiny hand held gizmo that would be really handy.
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