I have a Magellan GPS that was purchased in 2007 and I have never had any issues with it. This weekend when out hunting I noticed that it was acting up on me. My location was about 5-10 miles away from where I actual was and it said that I was at 83,000 ft of elevation. I am sure what the model number is on the GPS but I was curious if any one else has had this problem. Not sure if I need to send it back or if a new software upload needs to happen. Hopefully someone can help me out. Thanks