How to configure macArthur HAT and Raspberry Pi 3

[noel]

I have successfully installed my RPI5 with openPlotter 4 and the macArthur HAT. So that is all great. 

BUT I now want to use my old RPI3, reason being that I have bought the o-charts for Bahamas that are not transferable to my new setup, and I am on my way to the Bahamas for the winter season.

Here is what I have available. I am hoping that someone can point me in the right direction as to how to put this together:

1. RPI3 (obviously)
   
2. Openplotter 3
   
3. macArthur HAT
   
4. NMEA0183 inputs coming from my AIS and GPS. These are bare wires that are plugged into the HAT. The HAT shows lights flashing that there is NMEA0183 activity happening, but the documentation says that it doesn't work for the RPI3 and certainly I don't see any input into the OpenCPN.
   
5. NMEA2000 inputs coming from my Raymarine network - this is just depth and wind data which displays on p70 anyway, so not essential.
   

So, how do I get the NMEA0183 into my Pi3 with openCPN? Is there some way to configure the HAT? Or do I need to put a USB plug onto those bare wires so I can plug into  the RPI3 directly? Can I use the UART tab in openPLotter, or can I use the GPIO pins directly?

How do I get the N2K to show up? The documentations says to use the MCP251xfd tab, but there is no such tab on openPlotter 3, just PMCP251 which does not show a 2000000 oscillator.

Any suggestions?

Thanks

Noel

[noel]

SOLVED. I simply run the RPI5 as normal, and then connect the RPI3 to its wifi datastream. Means I have both Pis running at the same time, but that is not a big issue.