Furuno - Satellite Compass w/o Cable - SC70. The SC70 is the latest satellite compass built on FURUNO's commercial-grade technology platform. These satellite compasses prove their value by increasing the accuracy of other devices, such as Radar, ARPA, Scanning Sonar, Current Indicator, Chart Plotter, ECDIS and Autopilots. They provide a highly accurate heading input to these other technologies by utilizing the very latest GNSS (Global Navigation Satellite System). This satellite system is compri