Lowrance manuals are almost worthless, and until you get used to navigating the menus it will be very frustrating. I was ready to return mine after the first couple of trips, but then started to get a feel for it and now I find it works well. I read the manual 5 times, watched videos, then just went out and tried stuff, going to every option on the menu I could find and seeing what it would do. This was the only way to learn how to use it.