My GPS62 seems to be drifting sometimes. Started with last sw update 5.9 maybe. It can be up to 300 yards off, claiming I'm out of the n the middle of a river. Other times it seems right on. It's disturbing because I've "lost the trail" a few times and not been able to figure out where it was. It's happened in No Cal and so Ore using 24k topos bought at great expense from Garmin, so I expect the maps to be right. Any suggestions?
