Greg,

With the ethernet connection, can you share Navionics Lake Maps? So if you have a navionics lake maps card in a 898c si at the console and you put a 858c in the front of the boat linked via ethernet.. can you see the lake map data from the console unit?

Is there a basic unit that would just act as an additional screen? That way you could just have a "monitor" in the front of the boat linked to the 898c si via ethernet so you can view what is on your 898? That is basically all I would need and would be pretty awesome.

DoubleG