Maretron NMEA 2000 Solid-State Rate/Gyro Compass SSC300Maretron NMEA 2000 Solid State Rate Gyro Compass SSC300 Maretron's SSC300, implementing the second generation of Maretron's award wining compass technology, is a solid state, rate gyro electronic compass that provides better than 0. 7 heading accuracy through 45 of roll and pitch angle, and better than 1 roll and pitch accuracy in static conditions. Each SSC300 is factory calibrated for maximum accuracy. It delivers precise, reliable heading