High Precision Applications

Primed for excellence, the MRU 5 is the optimal sensor for various motion

compensatory functions used in multi-beam echo sounders, offshore cranes,

hydroacoustic positioning systems, and dynamic motion monitoring on

offshore structures. Its unparalleled roll and pitch accuracy of 0.02° RMS

within a ±5° amplitude is proven and documented, ensuring reliable

performance on any surface vessel or subsea vehicle.

Advanced Sensor Technology and Configurability

Integrating three top-tier accelerometers with three premier Kongsberg

Seatex developed MEMS gyros of MRG type, the MRU 5 exhibits low noise

characteristics alongside exceptional bias stability and gain accuracy.

This high reliability is attributed to the use of solid-state sensors, which

circumvents any mechanical wear. Adding to its feature set, this unit comes

with specialized Windows-based configuration and data presentation software,

which allows for the precise definition of vector arms to the center of gravity

and two individually configurable monitoring points.

Enhanced Data Output and Complementary Algorithms

The MRU 5 is proficient in the output of critical motion-related variables,

such as roll, pitch, and yaw angles as well as angular rate vectors across

various adjustable frames. Furthermore, with the employment of the cutting-edge

PFreeHeave algorithm, it overcomes the perils of long swell conditions and is ideal

for applications that can utilize a delayed heave signal, commonly observed in

seabed mapping operations. External speed and heading inputs are also accepted

to augment the accuracy of heave, roll, and pitch under dynamic conditions.

The MRU 5 represents the pinnacle of marine motion sensing technology

– embodying a specially designed fifth-generation device that excels in

delivering high precision motion measurements within marine applications.

It stands out in its ability to offer highly accurate roll, pitch, and heave

measurements for the most demanding users.

High Precision Applications

Primed for excellence, the MRU 5 is the optimal sensor for various motion

compensatory functions used in multi-beam echo sounders, offshore cranes,

hydroacoustic positioning systems, and dynamic motion monitoring on

offshore structures. Its unparalleled roll and pitch accuracy of 0.02° RMS

within a ±5° amplitude is proven and documented, ensuring reliable

performance on any surface vessel or subsea vehicle.

Key features

• 0.02° roll and pitch accuracy

• Outputs on RS-232. RS-422 and Ethernet

• High output data rate (200 Hz)

• Precise heave at long wave periods by use of PFreeHeave algorithms

• Lever arm compensation to two individually configurable monitoring points

• Meets IHO special order requirements

• Small size, light weight and low power consumption

• No limitation to mounting orientation

• Each MRU delivered with Calibration Certificate

• Selectable communication protocols in the Windows based MRU configuration software

• 2-year warranty

Precision and Reliability

The MRU 5+ provides documented roll and pitch accuracy of 0.008°

and angle noise less than 0.002°. Every unit is delivered with an

individual calibration certificate documenting this accuracy. This is

made possible by use of accurate inertial sensors including three

rate gyros and linear accelerometers of excellent tactical navigation

grade performance. Very high reliability is achieved by using solid-state

sensors with no moving parts and the proven MRU electrical and

mechanical construction.

Advanced Motion Sensing Technology

The PFreeHeave algorithm uses past measurements to output a correct

and phase-free heave from MRU 5+. It has an advantage in long swell

conditions and for applications that can utilize a heave signal that is

delayed some minutes, typical for seabed mapping applications.

Additionally, a new MEMS based gyro is developed by Kongsberg Seatex

AS called MRG5 (Mru Rate Gyro) model 5. The MRG5 is optimized for use

in high-end applications. The MRU rate gyro combines very low noise,

excellent bias stability and outstanding gain accuracy and is the best

MEMS rate gyro available for maritime applications.

Ease of Integration and Application Flexibility

Interfacing the MRU 5+ to various sonar systems is made easy by including

data protocols for the most commonly used multibeam echo sounder systems

in the software. Using the configuration cable and the Windows version of the

configuration software, MRC+, a series of simple menu prompts allow the user

to choose the optimum configuration for his application. The MRU 5+ and the

MRC+ software are flexible and can accommodate a wide variety of application

types.

The MRU 5+ product is upgraded with the best MEMS based gyro

technology available. With exceptional low angle noise and bias

stability, the product is ideal for integrated INS/GNSS systems and

demanding survey applications.

Ease of Integration and Application Flexibility

Interfacing the MRU 5+ to various sonar systems is made easy by including

data protocols for the most commonly used multibeam echo sounder systems

in the software. Using the configuration cable and the Windows version of the

configuration software, MRC+, a series of simple menu prompts allow the user

to choose the optimum configuration for his application. The MRU 5+ and the

MRC+ software are flexible and can accommodate a wide variety of application

types.

Key features

• 0.008° roll and pitch accuracy

• Exceptional low angle noise and bias stability

• High output data rate (200 Hz)

• Outputs on RS-232. RS-422 and Ethernet

• Precise heave at long wave periods by use of PFreeHeave algorithm

• Each MRU delivered with Calibration Certificate

• No limitation in mounting orientation

• Lever arm compensation to two individually configurable monitoring points

• Meets IHO special order requirements

• Small size, light weight, low power consumption

• 2-year warranty

Kongsberg Maritime water cooled frequency converters are specially designed

for marine installations, where there are special demands regarding ambient

conditions, and high power density.

Kongsberg Maritime water cooled frequency converters are based on the

“active front end” technology to avoid harmonic distortion and can transfer

power in both directions.

The drive can be used for induction, synchronous and permanent magnet AC

motors.

Kongsberg Maritime low voltage frequency converters

Benefits

• No need for phase shift transformers and will therefore save space,

weight and installation costs

• Low harmonic distortion

• 4 quadrant power flows with adjustable limits for motoring and genera

ting gives short ramp times in both directions

• Power factor correction or constant power factor

• User friendly with graphical HMI interface and alarm history recording

and data loggers

• S-ramps, programmable ramps and constant power ramps options

• Rpm, torque or power control of motor

• Fieldbus interface

• Motor control for induction motor, synchronous motor and permanent

magnet motor

• Redundant solution

• Open loop/closed loop easy change over

• Anti spin/adaptive power limit

• Easy commissioning, I/O testing and standardized parameter settings,

without advanced motor tuning

• Several load reductions/control input options

• Load control and load reduction integration to BPS

• Redundant system both on AFE and motoring possible to operate with

reduced output

• High number of ships sailing with Kongsberg Maritime AFE frequency

converters, since 1998

GENERAL TECHNICAL DATA

• Supply voltage: 380-500VAC or 525-690VAC

• Power range: 400 – 5700kW

• Ambient temperature: 0 (no frost) – 450C

• Cooling water: FW 5 – 370C

• Degree of protection:  IP22

• System pressure: 1.5 Bar

The HiPAP 352P is a portable system designed for tracking

ROVs, tow fish, divers, and other subsea objects at several

thousand metres range. Operating in SSBL mode, it measures

the distance and direction to subsea transponders and computes

a 3D position in either local or geographical coordinates.

Featuring buit -in motion sensors, the HiPAP 352P compensates

for the vessel’s roll and pitch movements, enhancingpositioning

accuracy. Models such as HiPAP 352P-H and HiPAP 352P-5

incorporate MRU-H and MRU-5 motion sensors, respectively. 

These models require no calibration for roll and pitch alignments

but do need to be calibrated in alignmentwith the vessel’s gyro compass.

Meanwhile, the HiPAP 352P-MGC combines a motion sensor and a gyro

compass,completely eliminating the need for roll, pitch, and heading

alignments calibration.

The HiPAP 352P is a portable system designed fortracking ROVs, tow

fish, divers, and other subseaobjects at several thousand metres range.

Operating in SSBL mode, it measures the distanceand direction to subsea

transponders and computesa 3D position in either local or geographical

coordinates. The HiPAP 352P’s portability enableseasy installation on

various surface vessels or units.

Its operator station, APOS, offers a full range of functions for acoustic

positioning and data communication, while the system itself benefits

from the Cymbal acoustic protocol. Designed to accommodate a wide

range of transponderchannels and cNODE models, the HiPAP 352P

excelsin performance up to depths of 4000 meters.