I think I'm starting to get more used to the newer software, and will likely stick with it. I took some snapshots a couple of days ago, but when I look at them on the pc they appear grainier than I recall when I was on the boat. The water had a pretty good chop on it, so I didn't get the images I wanted, but plan to return later. While looking at the SI and 2d on both my units, I think there may be a sunken vessel of some sort there, but will have to wait until I get a chance to go back, I'm afraid, to be certain. When I was underway, I got an image of something spiking off the bottom to within 8' of the surface on both units but didn't locate that when I turned around; maybe a mast or something? Not sure, but it has my curiosity aroused.
I did get this shot of a know wreck in shallow water:
This is the one I meant to add at the top: