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Usage area
50 m depth, IP 68
Connectors
Lemo or SubConn 8 or SubConn 16
Roll & Pitch accuracy
- 30000.05° RMS
- 60000.02° RMS
- 90000.01° RMS
Heave accuracy
5 cm or 5.0%
Usage area
IP 65
Connectors
RJ45 or RJ50
Roll & Pitch accuracy
- 30000.05° RMS
- 60000.02° RMS
- 90000.01° RMS
Heave accuracy
5 cm or 5.0%
Related questions
- Read the full answer
Motion monitoring is a cornerstone of safety, operational efficiency, and asset protection in the offshore industry: whether on vessels, platforms, or subsea equipment.
- Read the full answer
An MRU measures motion in six degrees of freedom using gyroscopes and accelerometers. It provides accurate real-time motion data for marine monitoring, control, and instrument compensation, but cannot track long-period linear displacement.
- Read the full answer
A Roll & Pitch sensor provides basic attitude data in dynamic conditions using gyros and accelerometers. It’s more accurate than an inclinometer, but less precise than a VRU or MRU in marine environments.
Further reading
Advanced motion compensation for sonars introduced at Ocean Business 2025
Norwegian Subsea is bringing its acclaimed Motion Reference Unit (MRU) technology to sonar-based applications with the introduction of an updated MRU lineup featuring full aiding capabilities at Ocean Business 2025 this week.
Motion Reference Units for vessel performance optimisation in focus at Europort 2025
Next week, the maritime world gathers in Rotterdam for Europort 2025, one of the largest international meeting points for shipbuilders, technology providers and operators. With a strong focus on innovation and sustainability, the exhibition is an important platform for discussing how the industry can meet future demands through smarter, greener solutions.
A year in Motion Reference Units...
From bathymetric surveys to subsea inspections and wave radar systems, our Motion Reference Units (MRUs) have been put to work in a wide range of challenging environments during 2025. As the year draws to a close we take a quick look back at some of the highlights, applications, and collaborations that helped shape another strong year of progress for Norwegian Subsea.
