MRU Marine
The NORSUB MRU Marine is a robust and waterproof motion reference unit designed specifically for marine applications, with flexible communication options and the option to include a magnetometer.
MRU Marine
The NORSUB MRU Marine is a robust and waterproof motion reference unit designed specifically for marine applications, with flexible communication options and the option to include a magnetometer.
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 MRU Marine is built to withstand harsh conditions, offering robust performance even in extreme weather and sea conditions. Equipped with state-of-the-art sensor fusion algorithms and advanced technology, it delivers accurate roll, pitch, and heave measurements, enabling operators to optimise vessel performance, enhance safety, and ensure the integrity of marine operations.
The versatility and durability of the Norwegian Subsea MRU Marine make it an invaluable tool for a wide range of applications, including offshore wind farms, subsea operations, marine research, and vessel performance analysis.
High accuracy roll, pitch and heave, even in irregular sea states.
Ethernet, serial ports and free software upgrades. Wide range of industry standard protocols. Custom NMEA and Binary protocol generator included in configuration software.
Robust and compact waterproof aluminum housing. The MRU Marine SW can even be used outdoors in the splash zone or in up to 50 m water depth.
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
Marine: Ethernet, RS-232, RS-485 (422), PPS
Marine SW: Ethernet & RS-232, Ethernet & 2-wire RS-485
Marine SW16: Ethernet, RS-232, RS-485 (422), PPS
Marine: TCP, UDP, Modbus TCP, ethernet/IP, Serial, Modbus RTU
Marine SW: TCP, UDP, Modbus TCP, ethernet/IP
Marine SW16: TCP, UDP, Modbus TCP, ethernet/IP, Serial, Modbus RTU
NMEA, ASCII, Binary TSS1, MDL, Atlas, Simrad EM 3000, NORSUB, Custom, ++.
0-100 Hz
Marine: Lemo 16 pins
Marine SW: SubConn 8 pins
Marine SW16: SubConn 16 pins
Marine: IP68
Marine SW: 50 m water depth
Marine SW16: 50 m water depth
154 x 86 x 67 mm
1.2 kg
Marine Anodized Aluminum 6061-T6
Operating/Storage: -40 to +85 °C
All Norwegian Subsea Motion Reference Units (MRUs) can be easily configured using the MRU Configurator (free of charge).
Simply define the communication ports and protocols as well as the MRU mounting orientation and location, and you are ready to go.
The MRU Configurator is also a great tool to monitor the outputs in real-time, plot the variables, check the on-board diagnostics and update the MRU firmware.
Read more about the MRU Configurator
Norwegian Subsea is bringing its acclaimed Motion Reference Unit (MRU) technology to sonar-based applications with the introduction of an updated MRU lineup featuring full aiding capabilities at Ocean Business 2025 this week.
Helideck Motion Monitoring & Weather Data Systems (HMS) provide real-time motion and environmental data essential for flight planning and for pilots to remain in safe control during take off and landing from moving helidecks. The HMS depends on Motion Reference Units (MRU) installed directly on to the support structure that continuously measure the helideck’s movement. Leading HMS manufacturer ShoreConnection chooses MRUs built by Norwegian Subsea.
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.
