Mercury - SmartCraft / NMEA 2000 GPS Antenna Auto-Detect Position Source 8M0130792. Overview. Some systems need SmartCraft data, others need NMEA 2000, and on certain boats you might not know which format you'll end up using as the helm evolves. The Mercury 8M0130792 GPS Antenna removes all the guesswork. It automatically detects the network it's plugged into and feeds clean, reliable GPS information to either system without any setup. Whether you're powering a gauge, a tow feature, an Active Tr