It's truly amazing how pros can interpret those things as well as they can. I just spent the weekend listening to sonar seminars by Don Iovino, the leading expert on electronics. He sells a book and DVD that are both excellent to prime us on the basics of using sonar to locate precisely where the fish are and catch them using finesse tactics primarily in deeper water. A few things I learned: turn off the fish ID icon! Use the arches, they can indicate exactly where the bass entered the sonar cone left or right and many other details, such as movement. Adjust sensitivity so that you get a second reading, but barely, if it's adjustable. If you are using 2 sonars, you must turn one off or you may be introducing interference. On the LCD, the DARKER the bottom, the harder it is (more sound waves being reflected as opposed to being absorbed by a softer bottom) ...I've just begun reading his book so there is much more but I hope this little bit helps someone a litte bit, for now...Peabody
