Simrad announces GLONASS compatibility in MX series

EGERSUND, Norway – New Simrad MX Series MX521B Smart Antenna, and HS80A and MX575D DGNSS Compasses have been announced. The new products are compatible with both Global Navigation Satellite Systems (GNSS) system in operation — the US Global Positioning System (GPS) and the Russian Federation’s Global Orbiting Navigation Satellite System (GLONASS).

A space-based satellite navigation system operated by the Russian Aerospace Defense Forces, GLONASS provides additional satellite coverage to GPS. Enhancing heading and position performance, and reducing the time taken for position acquisition, the new Simrad MX521B Smart Antenna, HS80A compass and MX575D compass feature increased lock-on speed and accuracy in challenging conditions. Latest GN70/MX610/MX612 Control and Display Unit (CDU) software can be used with these antennas for both GPS and GLONASS functionality.

The Simrad MX521B Smart Antenna is backward compatible with the existing MX521A Smart Antenna and is compliant with the latest IMO requirements. With the use of its built-in beacon demodulator, the MX521B provides real-time corrections to deliver highly accurate (better than 1 meter) and reliable positioning when in range of a beacon station. In standard GNSS mode, it provides better than 3-meter accuracy. The MX521B can also use Space-Based Augmentation Systems (SBAS) to provide accurate positions in areas not covered by Differential GPS (DGPS) beacon stations.

The Simrad DGNSS compasses provide extremely accurate and reliable heading, rate of turn, and position information to Simrad autopilots, MX Series navigation systems and AIS transponders via NMEA 2000 or NMEA 0183 interfaces. The DGNSS-based Simrad MX575D compass delivers heading and DGNSS position accuracy within 0.5-degrees and sub-meter, respectively. The Simrad MX575D uses RTCM correction data supplied by its internal beacon demodulator or SBAS to achieve the high-level of accuracy.

HS80A can use SBAS corrections to achieve DGNSS accuracy. The MX575D and HS80A are IMO compliant and approved for both navigation and heading functions. In addition, both compasses include integrated gyro and tilt sensors that decrease start-up time and provide heading updates during any temporary loss of satellites.

“Simrad MX Series customers expect the highest level of reliability and accuracy from their navigation systems,” said Leif Ottosson, CEO, Navico. “By including GNSS sensors as well as DGPS and SBAS, we are able to proudly deliver products that professional mariners can feel comfortable and confident in staking their careers and even their lives on.”

The Simrad MX521B Smart Antenna, and HS80A and MX575D DGNSS Compasses are available from authorized dealers in the United States and Canada. For more information on the Simrad MX521B, HS80A and MX575D, or the entire line of Simrad MX Series marine electronics, please contact 800-324-1356 (toll-free) in the USA or 800-661-3983 (toll-free) in Canada or visit

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