Graphing with node red and signalK

[JD1]

So I have one more update .... It turns out that my AIS receiver is a version '1' NMEA0183 talker and this caused the corruption of the NMEA0183 data. It would appear that none of the listeners in my system are opto isolated on their input (not even the Raymarine chart plotter ?!) and it would appear that this causes all kinds of intermittent grief. I managed to reduce the interference but was unable to remove it completely.
Let it be known that having version '1' NMEA0183 equipment mixed with version '2/3' NMEA0183 equipment without isolation/buffer in between is major bad juju !