MRU Compact
The MRU Compact is a small-footprint unit with an easy installation process, supporting various communication protocols and featuring a dust and splash-proof design.
MRU Compact
The MRU Compact is a small-footprint unit with an easy installation process, supporting various communication protocols and featuring a dust and splash-proof design.
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
The NORSUB MRU Compact is a small, yet accurate motion reference unit that is easy to install due to its passive Power over Ethernet (PoE) interface. A regular RJ45 Ethernet connector is used for both power and communication so that any cat5e cable can be connected. This makes installation fast and cabling costs low.
The MRU Compact is configured via Ethernet (TCP) and measurements data can be acquired from UDP messages, Modbus TCP or Ethernet/IP.
The MRU Compact dust and splash proof and is suitable for mounting indoors or inside a control box.
The MRU Compact comes in three different versions: 3000, 6000 and 9000 models to accommodate for different accuracy requirements and budgets.
The MRU Compact is also available in an inclinometer version of the MRU Compact that does not include Heave/Surge/Sway outputs.
High accuracy roll, pitch and heave, even in irregular sea states.
RJ45 or RJ50 connector with Passive Power over Ethernet (PoE) makes installation easy and cabling costs low.
Low weight and small footprint enable installation almost anywhere.
Experience enhanced efficiency and performance with MRU Insight. Analyse, visualise, and integrate your motion data effortlessly, gaining valuable insights. From real-time monitoring to comprehensive reporting, MRU Insights revolutionises MRU data utilisation for informed decision-making, enhanced safety, and improved performance. Elevate your marine operations with MRU Insights and unlock the full potential of your MRU investment.
Available in the 3000, 6000 and 9000 series
0.05° (3000 series)
0.02° (6000 series)
0.01° (9000 series)
RMS (dynamic)
5.0 cm or 5.0 %
Whichever is greater for 0 to 25 s periods, valid for irregular motions in real sea conditions
RJ45: Ethernet
RJ50: Ethernet & RS-232 / Ethernet & RS-485 / Ethernet & PPS
RJ45: TCP, UDP, Modbus TCP, ethernet/IP
RJ50: TCP, UDP, Modbus TCP, ethernet/IP, serial, Modbus RTU
NMEA, ASCII, Binary TSS1, MDL, Atlas, Simrad EM 3000, NORSUB, Custom, etc. ++ / See protocol list
0-100 Hz
RJ45
RJ50
IP65
120 x 57 x 53 mm
0.55 kg
Anodized alumnium 6061-T6
Operating/Storage: -40 to +85 degrees Celsius
From bathymetric surveys to subsea inspections and wave radar systems, our Motion Reference Units (MRUs) have been put to work in a wide range of challenging environments during 2025. As the year draws to a close we take a quick look back at some of the highlights, applications, and collaborations that helped shape another strong year of progress for Norwegian Subsea.
Motion Reference Units (MRUs) are crucial in wave radar technology, providing precise measurements of platform motion to accurately separate true wave patterns from a vessel's movements, therefore ensuring reliable data for maritime operations. However, before leading wave radar manufacturer Miros started working with Norwegian Subsea in 2016, it could be said that the MRU market was holding their potential back.
As the maritime industry accelerates its journey towards smarter, more efficient digital operations, structural health monitoring systems are playing a central role in operational efficiency, safety and sustainability. These systems increasingly depend on real-time, high-fidelity data from Motion Reference Units (MRUs) to contextualise structural stresses with the vessel’s motion in a given sea state. This is especially important in meeting the evolving requirements of classification society SMART notations from bodies such as the American Bureau of Shipping (ABS) and DNV.
