Gyro Compass and INS

A new family of products with motion sensing and gyro compass functionality is introduced. This MGC R4 product, with emphasis on position drift, includes three Ring Laser Gyros and three linear accelerometers.

Navigation Precision and Versatility

The MGC R4 is a fully inertial navigation system (INS) capable of outputing heading, roll, pitch, heave, and position. It includes integrated navigation algorithms with input from a GNSS receiver for output of aided position and heading data, enriched by PFreeHeave algorithms that ensure down to 2 cm accuracy in delayed heave output and 3 cm in real-time heave output. The unit can also serve as an IMU in other systems, designed for high precision maritime applications including offshore operations and seabed mapping.

Flexible Configuration and Output Options

Configurable with the Windows based MRC+ software, the MGC R4 outputs both processed and raw sensor data through multiple options. It can provide heave measurements at four different locations and supports various digital I/O protocols for easy data distribution. The unit operates in both Gyrocompass and Integrated Navigation modes, depending on the demand for either speed input only, or additional speed, position, and PPS from a GNSS receiver. Moreover, it offers high output data rate and precise heave even during long wave periods.

Key features

  • 0.008° roll and pitch accuracy
  • 0.02° secant latitude heading accuracy GNSS aided
  • Includes INS capability
  • Outputs on RS-232, RS-422 and Ethernet
  • High output data rate (200 Hz)
  • Precise heave at long wave periods by use of PFreeHeave algorithms
  • Lever arm compensation to two individually configurable monitoring points
  • Small size and low power consumption
  • Each MGC delivered with a Calibration Certificate
  • Selectable communication protocols in the Windows based configuration software

Technical specifications


Roll/pitch (unaided):
Heave (period, real-time):
5cm (25sec)
Heading (sec/lat) (GNSS aided):
Free inertial (GNSS aided):
0.4 nm/h

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