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NMEA 2000

NMEA 2000 is a plug-and-play communications standard used for connecting marine sensors and display units within ships and boats.

Communication runs at 250 kilobits-per-second and allows any sensor to talk to any display unit or other device compatible with NMEA 2000 protocols.

Electrically, NMEA 2000 is compatible with the Controller Area Network (CAN Bus) used on road vehicles and fuel engines.

The higher-level protocol format is based on SAE J1939, with specific messages for the marine environment. 

The protocol is used to create a network of electronic devices—chiefly marine instruments—on a boat.

Various instruments that meet the NMEA 2000 standard are connected to one central cable, known as a backbone.

The backbone powers each instrument and relays data among all of the instruments on the network.

This allows one display unit to show many different types of information.

It also allows the instruments to work together, since they share data. NMEA 2000 is meant to be "plug and play" to allow devices made by different manufacturers to communicate with each other.


We took the decision to make separate convertor boxes to convert a standard analogue sender to NMEA 2k protocol.  The combined cost of sender and converter is about the same as if we were to manufacture a NMEA 2k sender - these are still available as a special order (contact us for MOQ and lead-time) - but keeping the two parts separate makes retrofitting and replacement cheaper, not to mention customers