The “Ah ha” moment was this. We were out on the river and he pointed to his graph and said look at that paddle fish. It looked just like a paddle fish. On my screen is would have possibly looked like a light colored blob. Maybe. Another example was passing by a boat launch. I could see the concrete was a harder return, he could see the ribs in the concrete.
I have put in the time, played with the settings, watched hours of video. I just don’t think this first gen unit has the capabilities.
Last note of reference. I bought a new gen 4 DI only unit for ice fishing and put it in the front of my boat. It’s DI is so much more clear than the DI on my old gen 1. Night and day.