NMEA 2000 / SeaTalkng
The current marine industry standard. All current Raymarine MFDs are NMEA2000 certified. The standard utilises the CAN (Control Area Network) design developed by Bosch for the automotive market but with messages/sentence appropriate for the marine industry.
A multi-talker, multi-listener approach using serial data at moderate date rates (250kbs).
Under the NMEA standard, manufacturers can use the cable/connector design of their choice so long as it conforms to certain requirements. The topology is a robust terminated backbone/spur design.
In a SeaTalkng installation, a backbone cable runs through the length of the boat.
Individual devices connect to the backbone by spur cables that run to T-pieces on the backbone. The backbone carries both data and power to attached devices. The backbone should be sized so that it will run past every location where an NG or NMEA 2000 device might be installed.
Two backbone cable lengths can be joined together by part A06030, a backbone extender.