The MRU-P is an advanced motion reference unit that combines three-axis solid state accelerometers, gyroscopes and barometric sensors and delivers heave, surge, sway, pitch, roll, heading, position and velocity outputs for marine and maritime applications.
With low noise and high accuracy, the sensor provides reliable real-time measurement under challenging surface or subsea conditions, and is ideal for a variety of use cases including bathymetric and hydrographic survey, platform stabilization, and unmanned underwater vehicles.
The unit incorporates a range of algorithms for specific platforms including surface vessels, ROVs and AUVs, buoys, cranes, helidecks and more. Data can be output in standard industry formats including Kongsberg/Seatex, Teledyne and SMC. The MRU-P is available in an IP67-rated housing or a special rugged subsea enclosure rated to depths of 1000 metres.
Specifications:
| Dimensions |
120 x 50 x 53 mm 245 x 140 x 115 mm (subsea) |
| Weight |
320 g 6.67 kg (subsea) |
| Power | 3.5W (4.5W w/ datalogger) |
| Heave/Surge/Sway Accuracy |
5% / 0.05 m RMS 3% / 0.03 m RMS delayed |
| Heave/Surge/Sway Resolution | 0.01 m |
| Heave/Surge/Sway Measurement Range | ±300 m |
| Pitch & Roll Accuracy | 0.02 deg RMS dynamic |
| Pitch & Roll Resolution | 0.01 deg |
| Pitch & Roll Measurement Range | ±90, ±180 deg |
| Heading Accuracy |
0.2 deg static 0.4 deg RMS dynamic 0.1 deg RMS post-processed |
| Heading Resolution | 0.01 deg |
| Heading Measurement Range | 0 – 360 deg |
| Horizontal Position Accuracy |
1.5 m (GPS) 0.6 m (SBAS) 0.01 m + 1 ppm (RTK) |
| Velocity Accuracy | 0.03 m/s RMS |
