Originally Posted by brak
NMEA 2000 in my personal opinion is a protocol that is a "solution looking for a problem", and is not useful at all on a sailboat. (That and serial protocols are considerably more resilient in face of marginal connections and variable power conditions often encountered on a boat than Ethernet).
Wow, I could not disagree more.
With NMEA0183, you need to solder, crimp, twist, or make the electrical connection some other way. You need to figure out which device is the sender and which is the receiver. If you want to connect multiple devices, or send the same data to more than one device (like having speed displayed at the helm and down below) you need yet more things.
With NMEA2000, when you want to connect two devices, you just connect them with twist lock connectors. There is no soldering, crimping, or other things that can go bad. If you add another device later, you just install a T connector and you're done. It doesn't get easier than that.