Motion Compensation of Sub-Bottom Profilers (SBP)

Motion Compensation of Sub-Bottom Profilers (SBP)

Sub-bottom profilers use low-frequency acoustic pulses to penetrate the seafloor and image sediment layers, buried structures, and geological features beneath the seabed. Because the imaging geometry must remain stable to interpret sub-surface reflectors correctly, accurate motion compensation is essential to producing reliable, well-defined profiles.

Market-leading Motion Reference Unit for Sub-Bottom Profilers (SBP)

The Norwegian Subsea MRU 6000 series delivers the high-accuracy pitch, roll, and heave compensation that sub-bottom profiling demands. For deployment on towed bodies, ROVs, or AUVs, the compact titanium MRU Subsea, rated to 6000 metres, provides the same precision directly on the platform.

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Our high accuracy, compact and affordable MRUs

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 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

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What our customers say

"You get commercial-grade performance at a significantly reduced cost."

Sid Hynes, Master Mariner, Owner and Skipper of 'Best Kind'

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

Gabriel Walton, Technical Director, Ultrabeam Hydrographic

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Latest case studies

Ultrabeam Hydrographic

Ultrabeam Hydrographic enhances high-resolution 3D surveys with Norwegian Subsea Motion Reference Units

Ultrabeam, a specialist in hydrographic survey and underwater inspection, relies heavily on precise motion compensation to ensure accuracy in their 3D mapping projects. By integrating Norwegian Subsea’s compact, calibration-free Motion Reference Units (MRUs), Ultrabeam has significantly improved its survey data accuracy, while enjoying simplified integration, and enhanced operational efficiency in diverse surveying environments, from bridges, to offshore installations.

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Sid Hynes, Master Mariner

Canadian shipwreck hunters unlock new levels of multibeam performance with Norwegian Subsea Motion Reference Unit

Motion Reference Units (MRUs) are crucial in bathymetric survey technology, providing precise motion compensation data to ensure reliable and accurate seafloor mapping. For users like Captain Sid Hynes, a seasoned mariner exploring Newfoundland’s shipwreck-rich waters, the Norwegian Subsea MRU has redefined what is possible, delivering exceptional performance even in incredibly challenging conditions.

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WASSP Boosts Multibeam Accuracy for Marine Survey and Fish Finding with Norwegian Subsea Motion Reference Units

Norwegian Subsea’s Motion Reference Units (MRUs) are now available integrated with WASSP’s multibeam sonar systems, offering enhanced motion data accuracy and performance for offshore applications.

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