Can the MRU output remote heave?
Yes, the MRU can output heave measurements, including position, velocity and acceleration at 2 remote monitoring points.
In addition, you can use the measurment point at the centre of gravity and select the CoG position as the position of your 3rd monitoring point. Note: CoG position is not used as part of the calculations and can be set to any position.
The location of the remote monitoring points can be configured graphically in the configuration software.
demo.norwegian-subsea.no/settings/mounting
An example where this is usefull can be one MRU that provides output for 3 active heave compensated winches.
Related products
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
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
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
MRUs for vessel performance optimisation in focus at Europort 2025
Research Project to Test Value of MRU Data for Vessel Performance and Carbon Reduction
Advanced motion compensation for sonars introduced at Ocean Business 2025
Related questions
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Inclinometers offer basic static tilt readings, Roll & Pitch Sensors suit moderate motion, while VRUs provide precise roll and pitch in dynamic conditions. Choose based on motion complexity, accuracy needs, and budget.
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Yes, our MRUs measure surge and sway as oscillatory motions around a zero-mean position. For high-precision applications like 3D motion compensation, we recommend the 9000 series due to its superior roll/pitch accuracy.
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MRUs use advanced filtering algorithms like Kalman filters to remove noise and stabilise motion data. This ensures accurate 6DoF output for critical systems such as DP, AHC, sonar, and gangway control.
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