Keep in mind that in anything other than the simplest N2K network, these N2K to 01830 converters are problematic, and it takes a lot more than just a driver to pass data to really support N2K in OCPM or any other device. The crux of the issue is around instancing when you have multiple devices of the same type.
The beauty of N2K (or one of them) is that you can have multiple GPSs, Nav sources, etc on the same network, and via configuration decide which device gets used by who, reconfigure in the event of a failure, and often times configure for automatic fail-over. With 0183 these things require rewiring.
But N2K devices need to support these configuration operations to be fully functional. For example, if you have two GPSs on your N2K network, and use an N2K to 0183 converter to get that data to OCPM, somehow you need to be able to tell the converter which GPS
to use. I suspect most converters lock onto the first GPS
they hear and stick with it, ignoring the other. Hopefully they will automatically pickup the second GPS if the first one goes silent, but who knows.
In a fully functional N2K system, you should be able to select the primary GPS, and ideally designate a secondary, tertiary, etc. Then you can be sure that your high-precision sat compass/GPS is used, not the cheapo backup. And you can be sure the Sat compass
is used for heading info, not the less precise rate compass
When OCPM adds N2K support, hopefully all this will be taken into account. Again, it doesn't matter if you only have one of each device type, but I'd argue that two GPSs is pretty commonplace, and more serious cruising boats will often have redundancy in all vital nav components. For eample, most Nordhavns 47' and up have fully redundant auto pilots (two rudder
feedback units, two compasses, two AP computers
, multiple control heads, etc). Most will have a Sat compass (3rd heading source) which is also a GPS, a backup GPS, AIS
which has yet another GPS source, etc. It's not for everyone by any means, but for OCPM to be viable on such boats it will need to handle all this when it adds N2K.