What can I do with an ethernet cable?

[O2Fish]

I have the Lowrance x27 and am thinking about picking up a 520 for the bow. If I get an Ethernet cable, what can I all do with it? Id want to use two ducers but would I be able to just use my gps cone off the 27? How about the navionics background?

[PerchJerker]

The ethernet cable lets you share sonar displays, ie. 2 units on 1 transducer. I think it also shares satellite weather radio, and radar.

If you want to run 2 gps units off 1 gps antenna then you need to do the NMEA2000 networking - ie. backbone cables, t-connectors, terminators, etc. It connects to the network port on the back of your units, not the ethernet port.

You cannot share map card data across the units. You need a separate map card in each unit where you want the detailed maps, otherwise you'll be using the base map in the unit.