Originally Posted by Carusoswi
My Garmin Etrex Vista CX is very accurate at reporting distance. . . and average speed is fine. For a reading on my current speed, it is spotty.
When I first received it, I mounted it in lieu of my wireless computer. I have since remounted the wireless.
On downhills, the Etrex will often simply "freeze" at 14 mph for a while, then, jump to 35 MPH in one second. If, in the interim, you have exceeded 47 mph, then, the Etrex will have totally missed that top speed.
Actual distance travelled, however, is very accurate.
Caruso
Are you using battery save mode or normal mode? I know when I was testing the GPS's on battery save and normal mode battery save mode updated I think every 3 seconds where as normal updated I think every 1 sec.