Clark..I think the speedometer page mentioned above is an undocumented feature. I believe you get the same manual regardless of the unit. From what I have seen (I have had the unit 1 day…), the mapcreate software (from Lowrance) is basically the same map as the base Lowrance map, but with additional detail. With this software, you can copy map data to a memory card and use it as an alternative to the base map.
All…Have any of you bought or built a fixed mount for the ifinder on your boat? The lowrance unit seems a little expensive at $40 or so.