JRC GPS COMPASS MODEL JLR-31 (DISCONTINUED)5.7-inch high visibility displayRoll, pitch, rate of turn and heave integratedHigh speed tracking response (ROT 45°/sec)Wide range of new display modes availableDynamic heading accuracy 0.25° rms Newer Post JRC GPS/DGPS MODEL JLR-7600/7900 (DISCONTINUED) Older Post NISSHINBO MICRO DEVICES INC.