I agree with Jig, but to be a little more specific, a mapping GPS is the only way to go. One where you can put a navionics chip in so everything on Erie is right in front of you on the map. Then, everytime you catch a fish, mark the spot and it is a piece of cake to find and hit the same spots over again. I bought a humminbird a couple years ago with the chip it was about $900. They are probably cheaper now but you could spend several thousands if you want. This is a must have for Erie.