It is considered an improvement over the previous NMEA 0183 which doesn’t support both multi-talker and multi-listener data networks. NMEA 2000, also called N2K is not compatible with NMEA 0183. Just like NMEA, CAN was designed to allow automobile devices to communicate with each other without the need for a host computer. NMEA 2000 is based on Controller Area Network (CAN) which is the standard originally followed by the automobile industry. NMEA 2000 is self-configuring which means you don’t have to set it up, and you don’t have to be a tech expert to get the equipment to run. For instance, it can also be used to monitor engines, pilot steering systems, and supervise onboard fire and electrical systems. On the other hand, the NMEA 2000 is a form of plug-and-play communication tool used by marine electronics to share data with each other, although it also can serve a variety of other purposes as well. The data which can be in printed ASCII form can include information such as speed, position, and depth. Basically, each “bus” can have one talker but multiple listeners. NMEA 0183 uses a basic ASCII serial communications protocol that defines data transmitted from one source to multiple receivers. Thirty years after in 2001 the second one which is its successor the NMEA 2000. NMEA 0183 is the international standard released by the NMEA in the year 1983. There are currently two NMEA specifications being used today: The NMEA 0183 and the NMEA 2000.
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