What is the best MRU for ROV operations?
For Remotely Operated Vehicle (ROV) operations, the Norwegian Subsea MRU Subsea is the ideal solution. Its design specifically caters to the demanding conditions of subsea environments.
The MRU Subsea features a robust titanium housing depth-rated to 6000 meters. The titanium casing is very compact and depth-rated to
6000 m. The small size and footprint make it easy to install
almost anywhere. It is equipped with a Subconn wet-mateable
connector and is easy integration onto various ROV platforms, where space and weight are often critical constraints.
It supports both Ethernet (UDP, Modbus TCP, Ethernet/IP) and serial (RS-232 or RS-485) communication, offering flexible interfacing with ROV control systems. We provide a wide range of standard and customizable data protocols in ASCII or binary formats.
Like all our MRUs, the Subsea model utilizes advanced sensor fusion algorithms and state-of-the-art MEMS technology to deliver high-accuracy motion data (Roll, Pitch, Heave, Yaw, Surge, Sway). It is available in our standard accuracy tiers (±0.05°, ±0.02°, ±0.01° Roll/Pitch) to meet diverse operational requirements. An Inclinometer/VRU version is also available if full 6DoF data is not required.
Related products
Usage area
6000 m depth
Connectors
SubConn 8
Roll & Pitch accuracy
- 3000±0.05°
- 6000±0.02°
- 9000±0.01°
Heave accuracy
5 cm or 5.0%
Further reading
Advanced motion compensation for sonars introduced at Ocean Business 2025
MRUs for vessel performance optimisation in focus at Europort 2025
Research Project to Test Value of MRU Data for Vessel Performance and Carbon Reduction
Related questions
- Read the full answer
When navigating the complexities of motion sensing and navigation systems, it is essential to understand the distinctions between devices and systems like Inertial Measurement Units (IMUs), Inclinometers, Roll & Pitch sensors, Vertical Reference Units (VRU), Attitude and Heading Reference Systems (AHRS), Motion Reference Units (MRUs), Gyrocompasses, and GNSS-Aided Inertial Navigation Systems (GNSS/INS). Each serves specific purposes and offers different levels of functionality, accuracy, and application scope.
Gyrocompass
- Read the full answer
What is a Motion Reference Unit (MRU)?
A motion Reference Unit (MRU) is a device that measures motion in all six degrees of freedom (DoF): roll, pitch, yaw & surge, sway and heave. The six DoF positions, velocities and accelerations are measured by the MRU using high-end gyroscopes and accelerometers (and sometimes magnetometers) and processed by advanced sensor fusion algorithms.
- Read the full answer
When navigating the complexities of motion sensing and navigation systems, it is essential to understand the distinctions between devices and systems like Inertial Measurement Units (IMUs), Inclinometers, Roll & Pitch sensors, Vertical Reference Units (VRU), Attitude and Heading Reference Systems (AHRS), Motion Reference Units (MRUs), Gyrocompasses, and GNSS-Aided Inertial Navigation Systems (GNSS/INS). Each serves specific purposes and offers different levels of functionality, accuracy, and application scope.
Inclinometer
Related applications
ROV/AUV
Reliable motion sensors are vital components in the navigation system and motion compensation of payload sensors for ROVs and AUVs.
BOP Monitoring
Accurate motion sensors play a crucial role in the structural monitoring of Blowout Preventers (BOPs), enabling the measurement of inclination and lateral displacements.
Riser Monitoring
The NORSUB Subsea MRU is specifically designed to provide highly accurate measurements of roll, pitch (inclination), and lateral motions in risers.
Subsea Surveys
Subsea surveys often demand precise tilt measurements (roll and pitch) for various purposes, such as installation tasks or continuous monitoring of tilt changes and deflections in subsea structures.
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