Sleipner (maker of bow thrusters) uses a CAN network to communicate between the control panel and the thruster. Their wiring diagram shows a network that looks a lot like a NMEA 2000 network, and in fact, their "s-link" documentation says:
Main advantages include:
- Round, compact and waterproof plugs with unique keying to avoid faulty hookup
- Unlimited number of commands or information transfer on a single cable
- Proprietary Sleipner commands, but built 100% on NMEA 2000 standards
I have a pi with a CAN hat on my network. I think I'll see if any PGNs come over the wire from the thruster.