NMEA 2000 works well
I was unhappy that NMEA 2000 is never mentioned in any technical document either shipped with or currently available on the web site. The marketing brochure says it supports it, but you never see another mention of it.
Raymarine support told me to just cut off an NMEA 2000 cable and hard wire it to the SeatalkNG connections. Apparently SeatalkNG is a superset of the NMEA protocol with proprietary connectors.
My Lowrance display, GPS and DSC radio all magically began communicating over the NMEA 2000 network with zero configuration.
Installation was simple and it work great. Raymarine just needs to accept that proprietary networks are a thing of the past and embrace it.