I am trying to help out my friends with their new 1198. When I first started using mine and set up the unit, I remember each time I would power my unit off and then back on the setting on the Side Image as for the distance out from the boat always would go back to 164 feet. I did something to mine and can't remember what but mine doesn't do that anymore. Could someone set me in the right direction. Just wanted to help others out. Thanks.