Hi Guys Just bought a 598 hd been out a few times and have noticed the depth is jumping up and down say it is 6' actual it will be jumping from 6' to 300' and anywhere in between. The one on the trolling motor is steady at 6' no jumping also have noticed the d2 screen regular fish finder screen is in red and blue and does not show any fish with the fish id on. Thanks Cub48