Woah...that's weird. I have a Sport Trac Map as well and was going to do some geocaching yesterday as well and couldn't get a decent signal. It was a crystal clear day and I was picking up a weak signal from 1 satelite. I finally gave up. Went today and had a minimum of 7-8 satelites with strong signals. I was wondering what was going on??? By the way, I'm in central Texas.