I started a new thread because this I think deserves some attention. This is what I know. If I run the sensitivity up just nearly all the way I can pick up the thermocline which will be shown as a line across the screen. A forming thermocline shows up as a distinct haze across the screen. My question is do all Mississippi lakes have thermoclines at some point during the summer? What depth ranges have you found thermoclines to be in Ms Lakes? What about river systems like the Tenn-Tom you see them there?