Quote:
Originally posted by ChrisH
Hi Van,
There are twin Yamaha 200's
I have not really pushed her yet, I have been cruising at 3800 rpm's and we were doing 27 knots. I get different speed readings on the GPS, and speedometer, only a few knots difference. Do you think the GPS is more accurate?
Chris
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Your regular knot meter is giving you speed through the water.
Your GPS is giving you speed over the ground.
Also remember the paddlewheel or thingy on the stern for the knot meter has to deal with cavitation from the hull going through the water and surging of the water under the boat.