Can I Connect 2 NMEA2000 Networks using Garmin Marine network?

[The_Gentleman]

Hey Guys,

I am new to this forum so please excuse my ignorance to any conventional rules that you use in here.

I have there garmin 4212 chartplotters, two in the main cabin and one in the flybridge. They are all connected to a garmin radar and a garmin fishfinder via a garmin marine network expander. The chartplotter on the flybridge is connected to a GPS 17x NMEA 2000 receiver. GPS data, Chart data, Radar, and depth are available at all screens with no problem.

I added a heading sensor (AIRMAR H2183 NEMA 2000 cable) (certified by Garmin) to one of the chartplotters in the main cabin via a seperate NMEA 2000 network... "This NMEA 2000 network is not connected to the GPS NMEA 2000 network on the flybridge"

Heading information appears on all three plotters but I lose GPS signal on the two plotters in the main cabin. It seems like there is a conflict of addressing or something of that sort.

Is there anyway that I can resolve this issue?? Hopefully without having to run NEMA 2000 cable from the flybridge to the main cabin.

Would it be helpful if i installed another GPS receiver down in the main cabin with the heading sensor temporarily to resolve addressing issues? (Wild guess)

Any Help is sincerely appreciated.
Regards
Mike

[goboatingnow]

Mu understanding ( I have a similar system) is that the NMEA 2000 can only go into one of the Garmin units on the GMN. i.e. the same one. You can't have separate NMEA 2000 networks one, on each chart plotter and then correctly replicate over the GMN. This was based on a conversation with a Garmin tech a few years ago, and its what I did.

It may be different now, but after reading your post, I don't think so.

Dave

[The_Gentleman]

Thanks for your comments.

I might have to move the GPS receiver to the main cabin with the heading sensor and have just one NMEA 2000 network connected to one plotter... Hopefully that will solve the problem.
I will try that..
Regards
Mike