Does anybody have any knowledge/info regarding the NMEA 2000 architecture on a 2022 Moomba Makai?

I'm installing a RA770 head unit and wondering if it is possible to provide speed data via the nmea network to allow auto volume adjustment.

The 7-inch screen manual says it supports this network currently.

https://www.moomba.com/wp-content/up...-2023-700-.pdf

Thanks