GARMIN's Failure to Support NMEA 2000
 

I was stunned to find out that Garmin's new products
do not support NMEA 2000 while claiming they do.

While they put NMEA on the box, and have adopted
the NMEA connector, people are telling me none of
their products is functional on an NMEA 2000 network.

GARMIN's Failure to Support NMEA 2000
 

Maybe this will explain it:

http://www.panbo.com/archives/2007/0...good_news.html