Description
Product Overview
Kongsberg Seatex MRU-5-1 is a high-precision Motion Reference Unit (MRU) designed for marine motion measurement, stabilization, and dynamic compensation applications. It belongs to the Kongsberg Seatex MRU series and is developed specifically for demanding offshore, hydrographic, and marine automation environments where accurate measurement of vessel motion is essential. The unit integrates advanced solid-state MEMS sensors, including high-performance accelerometers and gyroscopes, to continuously measure vessel roll, pitch, heading-related motion, and linear acceleration with high stability and low latency.
Kongsberg Seatex MRU-5-1 provides real-time motion data used by navigation systems, dynamic positioning systems, hydrographic survey equipment, offshore cranes, and marine stabilization platforms. By accurately compensating for vessel movement caused by waves, wind, and ocean currents, MRU-5-1 improves measurement accuracy and operational safety in complex marine conditions. The unit is designed with no mechanical moving parts, increasing long-term reliability and reducing maintenance requirements compared with traditional mechanical gyroscopic systems.
As an important component in marine automation and instrumentation systems, Kongsberg Seatex MRU-5-1 offers high measurement precision, fast response, and flexible communication capability for integration with external control systems. It is widely applied in offshore energy, marine research, underwater positioning, vessel automation, and survey applications where reliable motion compensation is critical. The compact and rugged construction enables operation in harsh marine environments, making MRU-5-1 a trusted solution for professional marine operators and system integrators.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | MRU-5-1 |
| Manufacturer | Kongsberg Seatex (Kongsberg Maritime) |
| Product Type | Motion Reference Unit (MRU) / Marine Motion Sensor |
| Application | Vessel motion measurement and motion compensation |
| Sensor Technology | MEMS accelerometers and solid-state rate gyros |
| Measurement Range (Roll) | ±45° |
| Measurement Range (Pitch) | ±45° |
| Measurement Range (Yaw/Heading) | Up to ±180° |
| Roll/Pitch Accuracy | Approximately ±0.01° to ±0.02° RMS depending on conditions |
| Angular Rate Accuracy | High-stability gyro measurement for dynamic motion monitoring |
| Data Output Rate | Up to 200 Hz |
| Power Supply | 10–36 VDC |
| Power Consumption | Maximum approximately 12 W |
| Communication Interface | Serial communication interfaces (configuration dependent) |
| Operating Temperature | Approximately -20°C to +55°C |
| Environmental Protection | Marine-grade sealed housing, IP67 class |
| Dimensions | Approx. Ø105 mm × 140 mm |
| Weight | Approximately 2.4 kg |
| Installation Method | Fixed mounting on vessel structure or equipment platform |
MRU-5-1
Main Features and Advantages
Kongsberg Seatex MRU-5-1 is designed to provide highly accurate and stable motion measurement for professional marine applications. Its most important advantage is the use of advanced solid-state MEMS sensor technology, which eliminates mechanical wear components and significantly improves reliability during continuous operation. Unlike traditional mechanical gyroscopic systems, MRU-5-1 provides long service life with minimal maintenance requirements, making it suitable for offshore and marine environments where equipment accessibility is limited.
High measurement accuracy is one of the key characteristics of MRU-5-1. The unit continuously calculates vessel attitude changes, including roll, pitch, and acceleration, allowing connected systems to compensate for vessel movement in real time. This capability is essential for applications such as multibeam echo sounders, offshore crane operations, underwater positioning systems, and dynamic positioning solutions, where even small motion errors can affect operational results.
The compact and rugged design of Kongsberg Seatex MRU-5-1 enables installation in a wide range of marine environments. The sealed housing provides protection against vibration, humidity, and harsh operating conditions commonly encountered on ships and offshore structures. Its low power consumption also makes it suitable for integration into distributed marine instrumentation systems.
Another major advantage of MRU-5-1 is its compatibility with modern marine automation architectures. The unit can provide motion data to navigation systems, survey computers, control systems, and data acquisition platforms, enabling precise synchronization between vessel movement information and operational equipment. This improves measurement quality, enhances safety, and increases productivity in marine operations.
For offshore and hydrographic professionals, Kongsberg Seatex MRU-5-1 represents a reliable motion sensing solution combining accuracy, durability, and integration flexibility. Its proven performance makes it an important component in advanced marine automation and positioning systems.
Applications
Kongsberg Seatex MRU-5-1 is widely used in marine and offshore industries where accurate motion measurement is required. One of the primary applications is hydrographic surveying, where the unit provides motion compensation data for multibeam echo sounders and underwater mapping systems. By correcting vessel movement during data acquisition, MRU-5-1 improves the accuracy of seabed mapping and underwater survey results.
In offshore oil and gas operations, Kongsberg Seatex MRU-5-1 is applied in platform support vessels, offshore cranes, remotely operated vehicle (ROV) systems, and subsea positioning applications. Accurate roll, pitch, and acceleration measurements allow operators to maintain safer and more precise control during lifting, installation, and inspection activities.
The unit is also widely integrated into dynamic positioning systems for commercial vessels, research ships, and specialized offshore vessels. By providing real-time motion information, MRU-5-1 supports automatic vessel control systems in maintaining position and improving operational stability under changing sea conditions.
Marine scientific research organizations use MRU-5-1 for oceanographic measurement platforms, underwater exploration equipment, and autonomous marine systems. Its compact size, low power consumption, and high accuracy make it suitable for research vessels and specialized equipment requiring dependable motion monitoring.
In addition, MRU-5-1 can be used in naval, defense, and advanced industrial marine applications where accurate attitude measurement and motion compensation are essential for system performance and mission reliability.
Related Products
MRU-5 — Standard Kongsberg Seatex Motion Reference Unit providing high-accuracy roll, pitch, and acceleration measurements for marine applications.
MRU-5+ — Enhanced MRU version offering improved performance and additional configuration options for advanced marine systems.
MRU-M-SU1 — Kongsberg motion measurement unit designed for industrial and marine integration applications.
MRU2 — Earlier-generation Kongsberg Seatex motion reference unit used for vessel stabilization and measurement systems.
Kongsberg RMP201-8 — Remote measurement and I/O system often integrated with marine automation solutions.
Kongsberg EM Multibeam Systems — Hydrographic sonar systems commonly paired with MRU products for motion compensation.
Kongsberg DP Systems — Dynamic positioning control systems utilizing MRU motion data for vessel control.
Kongsberg Seapath Series — Integrated navigation solutions that combine GNSS and MRU data for marine positioning.
