I fish in lakes off the Al river Tensaw river ect just north of Mobile. I bought the 7 elite mounted the sonar on the transom.The electrical is tied with the 12volt hookup that feed the trolling moter......interference like crazy....can u help with that?. Also I used the shallow water set up rookie or no expierence . I fish in normally 12 ft or less unclear water most of the time....settings please!!! I hope I did not waist my money. the reason I bought this was to see the fish and learn of course ...