[CA] [CA11] AIS Lost Connection (C90W C12OW C140W)

[Stoomy]

Hi All,
I have Raymarine C90W and C140W Chartplotters on my boat connected to a host of Maretron NMEA2000 devices via Seatalkng.

I recently added an ICOM M506 with AIS receiver on the N2K backbone.

With the radio / ais receiver connected I get "Connection Lost" messages on the chartplotters several times/minute.

This thread covers the problem well:

http://raymarine.ning.com/forum/topics/c...connection

If the above thread is accurate then a proprietary heartbeat signal is expected from the ICOM radio and isn't being sent. I was hoping you folks could list what the heartbeat signals are supposed to be. I'll be adding a Raspberry PI to the N2K newtwork and If I knew what the packets are supposed to look like, I can fake the signal in Linux.
Thanks!
~Brandon