Mercury - NMEA 2000 / SmartCraft GPS Kit with Mounts 8M6012227. Overview. Adding reliable position data to your SmartCraft or NMEA 2000 network can make a big difference in how your helm feels and performs. The Mercury 8M6012227 N2K GPS Kit gives you a clean way to bring accurate GPS information into your system, whether you're tracking speed over ground, heading, or other position-based functions. It mounts neatly, ties into your network without fuss, and gives your gauges and displays the data