Originally Posted by
Birdman
That is not what he meant. A NMEA port can't do both.
Yes it can - so long as both connections are the same speed. All NMEA data is, is standardized sentances - it matters not whether in comes from one NMEA source and goes out to another - it is only if the external unit is both a talker and listener that they need be on the same port.
As for the sharing DSC data from the radio and AIS data will show up on both plotter so long as you have NMEA 0183 bridging set to on and both plotters are connected to the NMEA 2000 backbone; you cannot send data to the DSC radio from the non-attached chart plotter.