Tritech Intelligent Gyro Compass (iGC) – Heading & Motion Sensor

The Tritech Intelligent Gyro Compass (iGC) combines three angular rate gyros with three orthogonal DC accelerometers and three orthogonal magnetometers


This makes the iGC an invaluable heading sensor and motion reference unit (MRU) for numerous ROV and AUV applications.

The Intelligent Gyro Compass provides essential movement data not available from widely used Magnetically Slaved Gyro and Flux Gate Compasses.

Designed in compact housing and depth rated to 4,000m, the iGC incorporates a 9 sensor orientation processor, a proprietary interface and protocol converter.

Operating over the full 360° of angular motion on three axes, the iGC provides orientation matrix and quaternion formats. These may be used directly, but are normally converted to an industry standard navigation output telegram. This can be configured by the user to match a wide selection of common heading sensors

Technical information

Heading Properties

Orientation range: 360° full scale, all axes
Angular velocity range: ±300° per second
Sensor resolution: 16 bits
Dynamic compensation: Close loop digital control (0 – 50Hz)
Orientation resolution: <0.1°
Accuracy: Better than 1°
Temperature drift: ±0.025% per °C
Linearity: 0.23% full scale (tested in static conditions)
Repeatability: 0.2°
Gyros ±300° per second
Accelerometers: ±5g
Magnetometers: ±250μT