Quote Originally Posted by rnvinc View Post
What is the exact model number of the 798 that you refer to...??

One way to remember this is....if the model number has "HD" in it...then that unit has the new dedicated DI crystals that are of a different technology than any of the older models that get their DI from the SI crystals...
798ci HD SI

798ci HD SI Combo :: Marine Fishfinder :: Humminbird