Chuck,
I have a 798 as well. With several of the lakes around here, the hard part is knowing how to identify the fish on the graph. There are so many rough fish everywhere, that it seems difficult be able to distinguish. After having mine for almost a year, I haven't done over anything yet that I could look at the graph and know that it's crappie. Has that been your experience? Most of the HB forums show beautiful pics, but they're typically from a 998 or above. Much more detail there. Has anyone else experience this? Should I be able to spot the schools and know they are crappie or am I expecting too much of my unit?