I don't have any snapshots but will try to remember to take some next time. Most everyone that fishes this lake knows where it is but it is cool to get an actual picure of it. I'm not sure if I understand what you mean by a waypoint marked in the water column. Could you be a little more specific? i'm just starting to put in the time to learn this. I have had the unit for a couple of years but not really used it to it's full potential. I was able to find several interesting things by reviewing the recording on Humviewer.