ReadingPCRepair

I agree that this sounds like an issue with the electronic compass. You have to keep in mind that you have to calibrate the electronic compass. I had to calibrate mine on the Colorado 300 every time I used it. That was actually the last thing I did trying to troubleshoot it. Still had the same results when trying to geocache. I'll read up on the process of calibrating it again and see if anything is different with it.

I feel compelled to reply to this as I experienced nearly the same thing with a different set of issues on a different GPS. I've owned an Oregon 400t since shortly after it came out. For awhile I was very gung-ho about the sport of Geocaching until markedly it dropped off after about nine months where I distinctly remembered having problems with the GPS not being able to effectively "lead" me to a position. Now, if I use the Oregon for just tracking a hike or other activities it seems to work fine. However for Geocaching the unit effectively gave me less than a whole year of service. Years pass until this June when I realize how much I miss Geocaching and plunk down the money for a GPSMAP64. First trip out I had the Oregon in one hand and the GPSMAP in the other and the difference was shocking; The Oregon acted like it had just come off of a Tilt-A-Whirl where the operator decided to let the riders stay on for an extended run while he went to take a smoke break. I could literally stand in one spot and watch the Oregon change heading about once every few seconds. Walking at a slow pace also produced the same results. I estimate that about 60% of the time the Oregon was actually pointing me to the right place. "Oh....so THIS is why I stopped doing it" was all I could say. For general hiking and other uses the Oregon works reasonably well. I'll pass it along to my son now that he's in Boy Scouts and he can use it for going on trips or any electronics projects where he needs a GPS. However I just found the original box for the Oregon last night and the receipt showing what I paid for it. I contemplated not looking for awhile, I knew it would only anger me. I think what bothers me is that other series like the GPSMAP have the well-earned reputation of being the workhorses of the handheld kingdom. To this day I still see people using the GPSMAP60 model and swearing up and down that they work better than anything else they have laid their hands on. And that sort of thing is an achievable goal for any product Garmin has put out.