Solid-State Rate/Gyro Compass without Cables. 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 0.7x heading accuracy through q45x of roll and pitch angle, and better than 1x roll and pitch accuracy in static conditions. Each SSC300 is factory calibrated for maximum accuracy. It delivers precise, reliable heading information ten times per second, plus vessel attitude includ