I have connected the nmea output from the chartplotter to the nmea input of
my gps.

Am I correct in thinking that I should be able to upload waypoints that are
created on my geonav 8 chart plotter to a garmin gps128.

Presently I dont see any....
I know that the connections/speed settings are o.k, because the plotter see
the data from the gps.




Also am I correct in thinking that the autopilot must be driven from the
nmea output from the gps rather that the plotter nmea out.