I saw the dog too, now that you mentioned it. They moved around a lot, and ended up to the west of me a couple hundred yards and stayed there for a couple hours before leaving. I just made a contour map from that trip on autochart pro. Not much that you can't figure out from riding around a few times, but if you overlay waypoints on it, it will show patterns etc. I haven't quite figured out the side-imaging mosaic part. It's a bit more complicated and requires more careful boat driving to get usuable results. I didn't make it to the water, the water came to me. It's raining. PM me if you like and it's convenient.
Thanks escout