I saw a color FF on a charter boat. The color display made it easy to determine what was structure, bottom and fish. Of course this was an expensive commercial device. Color FF have come down in price to $600 (more or less). The ones I have looked at in stores (in simulation mode) seem to color everything on the bottom one color, everything above the bottom another color, stuff above that another color etc. It appears to be just a "stratified color display". Is there more "intellegence" in the unit than that?