NMEA is the standard used by all the leading suppliers of marine electronics today. For you, it means that you have a system that is compatible with your other onboard electronics and is future proof. The EVC-display can show your speed through the water and speed over ground. This data is also used to calculate your fuel consumption per mile, etc. For NMEA 2000 systems, all engine data is available for other instruments. For example, you can read all engine data in a compatible chart plotter.