Installation is everything. If its not set up right it wont work well. Check Salmonuniversity.com there was a guy at their Port Angeles class that had a bunch of great tips on getting the most out of your finder. I'll look for his name, but I know he was from the North end in Tacoma. He actually installs them and was a Lowrance rep I believe. I'll try and track the name down tomorrow and get back to you.