NMEA OneNet is a transmission method based on Ethernet. With NMEA OneNet, as the name suggests, an attempt is made to bundle a wide variety of transmission methods such as NMEA0183 and NMEA2000 in one protocol and thus maintain compatibility with old transmission methods. In addition, new protocols are added with which large amounts of data such as image and map transmission are also possible.
Ethernet is a very flexible network protocol that is suitable for many applications and is established in computer technology worldwide. It offers high transmission speed and is very reliable. Ethernet is also easy to install and manage, making it a good choice for many applications including NMEA OneNet. Usual inexpensive and proven network components can be used for networking in boats. For use, these components are additionally protected against water with suitable housings, cables and connectors. Achievable data rates are in the range of 10 MBit…1 GBit. The use of fiber optic technology can significantly improve the immunity to interference in complex systems. Wireless transmission technology such as WiFi is also possible and opens up new areas of application. By using Ethernet, NMEA OneNet can ensure fast and reliable transmission of large amounts of data, which is crucial for future ship and boat applications. The use of Ethernet also allows NMEA OneNet to connect a large number of devices, increasing the functionality and connectivity of the network. With common transmission protocols such as TCP/IP or UDP, proven and reliable methods are used and simplify the data processing, evaluation and presentation of information.
NMEA One Net is currently still in the specification phase and has not yet arrived in widespread use or in consumer products.
There are currently no open source implementations for NMEA OneNet. Rather, there is a separate implementation as a counter-proposal to established bus systems and networks in the form of SignalK.