How do I select the best Norwegian Subsea product for me?
At Norwegian Subsea, we design all our Motion Reference Units (MRUs) for high performance, reliability, and cost-effectiveness, making the 'best' product dependent on your specific application requirements and operating environment. Our sensors utilize advanced algorithms and state-of-the-art MEMS technology, validated in real sea conditions to ensure robust and accurate 6DoF motion data (Roll, Pitch, Heave, Yaw, Surge, Sway).
Our core MRU range includes the MRU Compact (IP65, anodized aluminum, RJ45/RJ50 connectors with passive PoE) ideal for indoor or control box installations; the MRU Marine (IP68 or 50m SW option, anodized aluminum, versatile pigtail/Subconn connectors) designed for deck mounting or shallow water; the MRU Subsea (6000m depth-rated, titanium housing, Subconn connector) for deepwater applications like ROV/AUV operations and riser monitoring; and the MRU Ex (Ex d certified, stainless steel housing, pigtail cable) for hazardous area installations.
All models are designed for easy integration with standard protocols (Ethernet UDP, Modbus TCP, Ethernet/IP, RS-232/485 options) and user-friendly web-based configuration. They are compact, can be mounted in any orientation, and typically do not require recalibration, reducing lifetime costs. We offer different accuracy tiers (±0.05°, ±0.02°, ±0.01° Roll/Pitch) across these models, allowing you to select the optimal balance of performance and budget.
Ultimately, the best Norwegian Subsea MRU is the one that precisely matches your technical needs, environmental conditions, and integration requirements, delivering trusted motion data reliably and affordably.
Related products
Usage area
IP 65
Connectors
RJ45 or RJ50
Roll & Pitch accuracy
- 3000±0.05°
- 6000±0.02°
- 9000±0.01°
Heave accuracy
5 cm or 5.0%
Usage area
50 m depth, IP 68
Connectors
Lemo or SubConn 8 or SubConn 16
Roll & Pitch accuracy
- 3000±0.05°
- 6000±0.02°
- 9000±0.01°
Heave accuracy
5 cm or 5.0%
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%
Usage area
Hazardous areas
Connectors
Pigtail cable
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
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The MRU Marine is IP-68 rated with Lemo connectors and LEDs. The Marine SW supports 50m depth, uses SubConn connectors, and comes in two versions differing by available output combinations.
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A gyrocompass determines true north using gyroscopes and Earth's rotation, not magnetism. It’s essential for heading accuracy in marine and aerial navigation, though performance may vary at extreme latitudes.
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Passive PoE powers the MRU Compact via standard Ethernet cable without negotiation. It’s not compatible with most PoE switches (which use Active PoE), so a splitter or converter is typically required.
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