Around 8/11/2005 8:56 AM, NateN wrote:

Just got a new GPS and tested my speedometer with it. I found that it
is off by as much as 4 mph, but only at slower speeds. For Example,
when the boat speedometer reads 5 mph, the GPS shows 8.4 mph. At 20
mph or so, it's pretty accurate.

Is this fairly common?

I wouldn't know; my pitot speedometer is scaled in MPH, but at speed in
still water it seems to more accurately reflect my GPS's *Kt/h* reading.


--
~/Garth - 1966 Glastron V-142 Skiflite: "Blue-Boat"
"There is nothing - absolutely nothing - half so much worth doing
as simply messing about in boats."
-Kenneth Grahame, The Wind in the Willows