I have a Go9 and a evo 2 ..they wont network ..only the new Go12 & evo 3 will
you have to use them as stand alone .That's direct from Simrad Tech support
That is a pain in the rear. If it can receive radar, they can easily share other information. The GO9 and the older EVO2 units have the same CPU processor. Its really a decision by Navico to limit the capabilities to force you to buy the more expensive units. Its a bad decision in my opinion. The GO12 didn't allow sharing until the last firmware update.