JRC GPS COMPASS MODEL JLR-21 (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 0.5° rms Newer Post NISSHINBO MICRO DEVICES INC. Older Post NOVEGA- PT9 NINETY UNDER WATER BEACON FOR VDR