Is the MRU also available in a VRU / Inclinometer version?
All our MRUs are also available in a VRU (Vertical Reference Unit) / Inclinometer /Roll & Pitch version of the MRU. This version is identical to the MRU except that it does not include Heave, Surge and Sway outputs.
This means the our VRU / Inclinometer has all the advantages of the Norwegian Subsea MRU. It will be accurate in real sea conditions, in irregular and coupled motions. This is due to the use of the accurate gyroscopes and accelerometers and the advanced sensor fusion algorithms. This ensures superior performance compared to other VRUs or Inclinometers or Roll/Pitch sensors.
If you do not require Heave, Surge and Sway measurements, ask for the Inclinometer version.
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
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
- Read the full answer
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.
- Read the full answer
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.
- Read the full answer
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.
Related applications
Dynamic Positioning
Dynamic positioning (DP) of vessels necessitates roll and pitch compensation of the GNSS antenna to ensure accurate positioning of the ship's control point.
ROV/AUV
Reliable motion sensors are vital components in the navigation system and motion compensation of payload sensors for ROVs and AUVs.
Stabilising Fins
Stabilising fin and roll damping systems rely on motion sensors to accurately measure the roll motions of a ship.
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