Yes I know, I m sorry if he took offense. I mean we are talking about the different things, I want to see the wreck on my chart screen and revolve around ( circle ) it without hooking to wreck. I dont think if you set the bottom lock on, the settings of autochartlive scale will change! I asked if you have autochartlive on your unit, because mine is very far away from me n I will have chance to go there in may! Maybe someone can try this.