Raymarine, Garmin, SIMrad, B&G, ... what's what?
NMEA2000 is a protocol used in the boating industry to send messages from your wind or depth meter and allow your chartplotter to display it. This is the same for your engine informations but in some cases you'll need a specific gateway in order to get them.
Depending on the build date you should have the SeaTalk 1 or NG network on your boat. Seatalk1 is a propretary protocol base on NMEA0183. But don't worry there is a converter for SeaTalkNG.
The last SeaTalkNG is the last version and uses also the NMEA2000 standard. protocol.
They use the standard NMEA2000 circular connector also know as MicroC connector.
If you have this type of connector in your boat you are pretty sure this is an NMEA2000 backbone.
It uses a specific type of connector called SIMnet but it's an NMEA2000 protocol.
See hereclose a view of the connector :
|SIMnet cable with connector|