...precise, accurate info? Ok, I'm a little behind the curve on my knowledge of the features of these devices. But are most of them portable (e.g. can you remove them from the car and take them hiking)?
Also, how accurate are these? I know some pro GPS units are millimeter accurate. I don't expect a Garmin or TomTom to be quite that accurate, but how accurate are they? And to what precision? Which are best?
Do they give accurate altitude, too?
Also, do most of them give velocity information?
Also, how accurate are these? I know some pro GPS units are millimeter accurate. I don't expect a Garmin or TomTom to be quite that accurate, but how accurate are they? And to what precision? Which are best?
Do they give accurate altitude, too?
Also, do most of them give velocity information?