If you haven't gone out with it already mounted then you need to make a test run at a lake close by if possible. If you have troubles, take a snapshot of what you are seeing. You can get a chip pretty cheap now and should have it in your unit every time you go out, till you fully understand what you are doing and seeing. Take a snapshot of anything you might have a question about. If we have a photo we will better equipped to assist you with any questions that you may have.