Using "Send to GPS" to send via IP?

[jim326]

I'm trying to send waypoints from OpenCPN to my Simrad NSS8 GPS/Chartplotter via IP. I don't have an RS-232 connection. I have tried using the "Send to GPS" function, but there are no entries in the GPS/Plotter Port dropdown list, and I can't find anything in the help pages about the format of what goes in the text box.

I thought I might be able to type something like
192.168.1.10:10110
in the box, but doing so does not cause any messages to be sent (though OpenCPN happily informs me "waypoint(s) transmitted"). I have run a trace with WireShark, and verified that OpenCPN does not send any data if that string is used for the port.

Any help on the proper syntax to send to an IP address would be appreciated.

Thanks!

Jim