pg500PG500 is a compact and inexpensive fluxgate compass with a solid-state rate gyroscope for heading stabilization. It can output heading data in IEC 61162, NMEA 0183 or AD-10 formatPG500 is a compact and inexpensive fluxgate compass with a solid-state rate gyroscope for heading stabilization. It can output heading data in IEC 61162, NMEA 0183 or AD-10 format