An address based data packet network capable of high speeds (10/100/1,000Mbs) originally developed for the computer industry that is seeing adoption in the marine industry. Ethernet networks are designed as a star topology. Systems of three or more nodes require a hub, router or switch to facilitate all point to point connections. An NMEA standard for the transfer of NMEA 2000 messages using an Ethernet protocol is being developed that will be called OneNet.

Cable System

There are numerous cabling systems for Ethernet but the ones applicable to Raymarine installations include:

RJ45 Cable | Raymarine

Cat5 w/ RJ45

The standard cable/connector of the computer industry that is very low cost but alternatives such as SeaTalkHS and RayNet are preferred connectors in the marine environment.

SeaTalk hs | Raymarine


Raymarine’s first generation Ethernet connector which consisted of putting a waterproof collar around an RJ45 connector.

Explore SeaTalkHS

RayNet Cables | Raymarine


Raymarine’s current generation system that replaces the RJ45 connector with a waterproof vibration tolerant twist pin connector that is designed for the marine environment.

WiFi Connections | Raymarine


A wireless system that doesn’t use any wires that provides for low cost flexible installations but are not as robust as wired systems. WiFi is ideal for non-mission critical accessory connections.

Available cables: