Related Faq (MRU marine)

Norwegian Subsea works closely with customers to ensure each sensor is configured to meet specific application needs across marine, subsea, offshore, and industrial environments.

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Motion monitoring is a cornerstone of safety, operational efficiency, and asset protection in the offshore industry: whether on vessels, platforms, or subsea equipment.

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Norwegian Subsea’s Motion Reference Units (MRUs) are designed to deliver real-time data through a combination of high-end MEMS sensors, advanced sensor fusion algorithms, and onboard data processing systems.

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An Inertial Measurement Unit (IMU) is an electronic device that uses accelerometers and gyroscopes, and sometimes magnetometers, to measure and report an object's linear acceleration and angular velocity.

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A Vertical Reference Unit (VRU) is an advanced device that measures the attitude of an object, specifically its Roll and Pitch.

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Manual FAQ

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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Product Card Section

MRU Marine

Usage area

50 m depth, IP 68

Heave accuracy

5 cm or 5.0%

Roll & Pitch accuracy

3000±0.05°
6000±0.02°
9000±0.01°

Connectors

Lemo or SubConn 8 or SubConn 16

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MRU Compact

Usage area

IP 65

Heave accuracy

5 cm or 5.0%

Roll & Pitch accuracy

3000±0.05°
6000±0.02°
9000±0.01°

Connectors

RJ45 or RJ50

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MRU Subsea

Usage area

6000 m depth

Heave accuracy

5 cm or 5.0%

Roll & Pitch accuracy

3000±0.05°
6000±0.02°
9000±0.01°

Connectors

SubConn 8

Learn more

Product Variant Section

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Roll and pitch dynamic accuracy of 0.05° Heave accuracy: 5 cm / 5 %

The 6000 series provides high performance 0.02° roll and pitch accuracy

The 9000 series achieves exceptional precision with 0.01° roll and pitch accuracy

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Navn Navnesen
CEO of Wavefoil

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Navn Navnesen, CEO of Wavefoil

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The accuracy, weight, and form factor of Norwegian Subsea MRUs are unmatched.

Gabriel Walton
Technical Director, Ultrabeam Hydrographic

"The accuracy, weight, and form factor of Norwegian Subsea MRUs are unmatched."

Gabriel Walton, Technical Director, Ultrabeam Hydrographic

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Håkon Baste

Chair of the Board

hb@norwegian-subsea.no

Håkon comes from a background at DNV GL where he worked with offshore and shipping consultancy as well as newbuilding supervision and quality assurance. Håkon joined Norwegian Subsea in 2014.

Chris Ruigrok

Sales Manager

cr@norwegian-subsea.no

Chris holds an MSc in Aerospace Engineering and brings extensive commercial experience from the oil & gas, marine, and subsea technology sectors. His career has focused on the industrialisation and commercialisation of emerging technologies. Chris joined Norwegian Subsea in 2021.

Fredrik Dukan

CEO

fd@norwegian-subsea.no

Fredrik holds a PhD in Marine Cybernetics with focus on subsea navigation and ROV motion control systems. He previously held engineering positions at Aker and has broad experience from marine and subsea operations. Fredrik founded Norwegian Subsea in 2014.

Product Variant Section

a section of products variants

The 6000 series, with 0.02° accuracy in Roll & Pitch, is our most versatile MRU due to its high accuracy and is suitable for most applications. This is the recommended MRU for most control applications such as AHC and winch control.

The 3000 series, with 0.05° accuracy in Roll & Pitch, is ideal for Most monitoring applications where the main purpose is to collect motion data for analysis or decision making, such as helideck monitoring systems. Some instrument compensation applications such as wave radars and wind lidar buoys. Active heave control (AHC) for winches on smaller vessels with short lever arms to the remote monitoring points

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Bridges

Accurate and high-resolution motion sensors are crucial for the structural monitoring of bridges.

An Inclinometer measures static tilt relative to gravity using accelerometers. It’s ideal for stationary applications but not suitable for dynamic environments due to its inability to compensate for motion or vibration.

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Related Faq (MRU marine)

How do I purchase or contact Norwegian Subsea for sensor solutions?

What is the role of motion monitoring in offshore operations?

How is motion data filtered and analysed in real time by Motion Reference Units?

What is an Inertial Measurement Unit and how does it work?

What is a Vertical Reference Unit and how does it differ from a Motion Reference Unit?

Manual FAQ

What is a Gyrocompass?

An inline question

Product Card Section

MRU Marine

Usage area

Heave accuracy

Roll & Pitch accuracy

Connectors

MRU Compact

Usage area

Heave accuracy

Roll & Pitch accuracy

Connectors

MRU Subsea

Usage area

Heave accuracy

Roll & Pitch accuracy

Connectors

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Product Card Section

MRU Marine

Usage area

Heave accuracy

Roll & Pitch accuracy

Connectors

MRU Compact

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Heave accuracy

Roll & Pitch accuracy

Connectors

MRU Subsea

Usage area

Heave accuracy

Roll & Pitch accuracy

Connectors

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