I run with the flasher and 2d both on the screen. I was fishing in exactly 9’ of water. I noticed that the reading in the center of the flasher would flip to 10.5 and the bottom would move on the flasher circle and then move back when it flipped back to 9ft. On the 2d side, the bottom would jump up a foot and then back down. Really irritating. One person mentioned that I might have been on a little ledge and the cone was reading the drop. And it was causing the fluctuation. I had an ice 55 before and it never acted like that while fishing a slope.