Two nights ago, the doorbell rang, and since I live in the woods, we rarely get anyone that rings the doorbell. It was someone from the local fire department telling me that there would be 4 wheelers traveling up my driveway into the woods. I asked what was going on, and he said that they received a 911 call about a person lost in the woods after dark. The more I talked to him, the more it sounded like the person that I saw earlier in the day (while it was light out) walking into the woods near where my driveway intersects with another property. They decided to stage the rescue efforts at my home in the driveway. After about a half-hour, I went back outside to see if they had made any progress to learn that they were able to ping the 911 call, but the battery had died on the phone. He showed me a picture on his phone of my home, and where she was. I told them that they were looking in the wrong place and that they needed to go back to the end of the driveway and head into the trail at the bottom, and once on that trail, there were other trails that went to the left, and they would find her. The property that she was on has 2 streams bordering it. They made voice contact, but couldn't see her because it was dark, and that rescue team was on the other side of the water. Once they knew where to look, it made the search a lot easier, although it still took 4 hours to locate her. In the end, she was fine, only a little embarrassed. There were more than 10 fire/rescue departments from 2 states that responded to the mutual aid request. Got to see some interesting 4 wd ATVs of all brands that were built for fire suppression. I wonder if that a locating device such as you describe would have helped had she had one?