We bought (what I consider) expensive GPS/depth finder combo when we bought our boat (around $1000). The GPS portion of it never worked, can never get a signal. I think it has to do with where the fellow (where we bought the boat) mounted the receiver. Anyway, we ended up buying a cheap $200 handheld Lowrance, spent another $100 buying the BC chip, and it works like a charm. We plot where we drop our traps, our favorite fishing spots, and docking spots. Then on those rare days when we aren't out on the boat, we can take it in the truck to do some of our second favorite past-time - backroading. The chip even includes most of the logging roads. Certainly not a bad idea to get a hand held to familiarize yourself with a GPS, then upgrade at a later date when you have learned what features you like and don't like. Then you still have your handheld for the truck. I do carry LOTS of batteries. We have a plug in for it, but the cord is short and it's awkward, good in an emergency though.