GPS only computes heading from "last known position" to "current position",
if you are not walking.. the "last known and current" are the same.. there
is no heading to compute.. granted with minor errors of cheap handheld GPS
units.. the "movement" could be minor inches or parts of an inch as the GPS
computes it's position.. and that will cause a heading change..

BT

"Glenn Westfall" wrote in message
...
I have a Garmin 196 and just in the past week or so it is acting
strange. I get a signal just fine, but when I am standing still it
constanly changes headings. It never moves in a direction, just turns
in circles sporatically. Once I begin to move, it tracks just fine.
But as soon as I stop, it constantly changes headings again. Anyone
else experience this? I upgraded to the latest software, but that
didn't fix the problem.

Glenn