Well, after using the unit a few times I still haven't figured out the mapping/gps. If I am on the full map mode, or the split screen, the map does not change/follow as the boat moves, it is stuck where I marked my first waypoint. The only way to move the map is to arrow to where the boat is currently. I'm hoping it is just a setting I can change quickly, but I didn't have a chance to mess with it too much on the water because of the stiff wind. Any recommendations?