Mercury - MercMonitor NMEA 2000 Data Level 3 SmartTow Pro Kit SmartCraft Display 79-8M0135618. Overview. The Mercury MercMonitor NMEA 2000 Data Level 3 SmartTow Pro Kit (79-8M0135618) is the top-of-the-line SmartCraft display, delivering complete SmartTow Pro functionality and full SmartCraft engine data in one advanced package. With both GPS and antenna included, SmartTow Pro lets you launch and run your boat using speed- and RPM-based profiles - giving you total control over every takeoff.. Th