01 / GYROCOMPASS · ST. PETERSBURG
MSG-25.
Heading and motion.
Testing in 2026, RMRS type approval and a 2025 Russian patent. MSG-25 is a complete product for ships and vessels.
MARO Sensor · TRAFFIC INSTRUMENTS
INERTIAL COURSE FROM STARS TO ALGORITHMSMSG-25.
02 / READY SOLUTION · MRU REPLACEMENT
MC-22
instead of MRU.
The original main offers a sensor MC-22 to replace the MRU and claims improved performance, reliability and accuracy. Specific compatibility varies by model and on-board system.
03 / RMRS SIX DEGREES OF FREEDOM
Type approval
and 6DoF.
RMRS type approval and six-degrees-of-freedom sensors. MARO Sensor is a Russian manufacturer of this equipment.
04 / TWO DEVICES ONE SOLUTION
AXRS + MRU
→ MC-22.
One MC-22 replaces two imported devices — AXRS and MRU. Compatibility depends on the exact models and onboard system.
05 / FACTORY CALIBRATION
Install once.
Stay on course.
This is the name of the slide about MC-22: The website states initial calibration by the manufacturer and no need to repeat it every two years. Long-term drift is said to be acceptable in the life cycle. Check against your data sheet and protocols.
06 / MS SERIES · VALUE WITH MAIN
0,003°
roll / pitch.
This error is shown on the original main page under the line of MS series sensors, but the model and measurement conditions are not indicated nearby. Therefore, the number remains a separate thesis and is not attributed to a specific device.
NEWS AND DEVELOPMENTS
Development
continues.
250 gMASS
≈ 2 WPOWER
1 kHzOUTPUT RATE
MARO Sensor expanded its line of inertial navigation solutions
Compact MS-21 micro, the variant MS-21 with GNSS and RTK and a hydrographic complex - for unmanned platforms, survey work and marine navigation.
Read the article01 / AREAS OF APPLICATION
Measurements
for vessel operations.
Motion and orientation data for navigation, pitch compensation and control of ship systems. On surface vessels, underwater vehicles and marine robots.
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02
03
04
05
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Navigation and sea robots
Orientation and motion data for navigation systems and unmanned aerial vehicles.
Hydrography and fisheries
Accounting for pitching in the operation of sonars, multibeam echo sounders and fish-finding systems.
Dynamic positioning
Motion measurement for systems to hold a vessel in a given position.
Strength and stability
Data for monitoring hull strength and current vessel stability.
Helipads
Platform motion monitoring and data for active roll compensation.
Ship antennas
Orientation measurement for antenna pointing systems on a moving ship.
Systems, tasks
and types of vessels
and types of vessels
MOVEMENT IN SIX DEGREES OF FREEDOM
WORKING CONDITIONSAccuracy matters
Accuracy matters
in motion.
When the ship is operating, measurements help the equipment maintain the correct coordinates and orientation.
WORK ENVIRONMENT
Research vessels · pipelayers · floating cranes · marine robots
02 / DEVICES MARO Sensor
New
COURSE · ROLL · PITCH
COURSE · ROLL · PITCHGyrocompass
MSG-25.
A Russian-developed gyrocompass for determining the course and movement parameters of a vessel. For installation as part of marine and naval navigation systems.
- Heading accuracy
- 0.1° / cos latitude
- Roll / pitch
- 0,005°*
- Vessel speed
- up to 90 knots*
- Working latitudes
- up to 85°*
- Declared resource
- 100,000 hours*
Specifications follow the operation manual. The current documentation and delivery configuration are available on request.
Composition and information about MSG-25 ↗MS SERIES · FOUR VERSIONS
Motion reference
units for vessels.
From MRU to execution with GNSS and RTK. Select a model to access information about the device and its integration.
03 / MEASUREMENT ACCURACY
Small angles.
Major responsibility.
Two angular deviations. Same distance. Let's see how the geometric displacement changes as the angle decreases.
CURRENT ANGLE ON THE DIAGRAM0,000°
Building a 0.1° deviation
GEOMETRY OF TWO ANGULAR DEVIATIONS
REFERENCE0,1°
→DISTANCE1 000 km
≈OFFSET0,0 m
Δ⊥ = L × tan(α). The vertical scale of the angles is increased for clarity. This is a comparison of the geometry of two constant angles, not a prediction of navigation system error, and not a comparison of heading characteristics with roll and pitch.
04 / CALIBRATION AND MAINTENANCE
Accuracy starts
with calibration.
Zero offset, scale factor, and relative orientation of the axes affect the motion measurement. Calibration allows these systematic errors to be identified and taken into account.
XYZMEMS
IMU 01 / ZERO OFFSET02 / SCALE03 / NON-ORTHOGONALITY
IMU 01 / ZERO OFFSET02 / SCALE03 / NON-ORTHOGONALITY
Zero offset
Non-zero output when there is no measured motion.
Scale factor
The difference between the actual impact and the sensor reading.
Non-orthogonality of axes
The axes of the sensitive elements are not located exactly at right angles.
Laboratory calibration in static and dynamic modes, with a calibration certificate.
Material "Calibration" ↗SEPARATE STATEMENT ABOUT MC-22±0,0001°per year
Long-term roll and pitch drift. Factory calibration once — no repeat every two years.
Source of the statement ↗05 / CONVERSION
MRU replacement
for your vessel’s needs.
Replacement of foreign sensors with MARO devices. The selection begins with the installed model, operating conditions and on-board system interfaces.
TRANSITION
ON MC-22
ON MC-22
REPLACEMENT SCENARIO
Compatible with your on-board system.
MRU models that can be replaced with MC-22. Exact interchangeability is confirmed for your device.
KongsbergMRU-S · MRU-3 · MRU-H · MRU-E · MRU-5 · MRU-5+
SMCIMU-106 · IMU-008 · IMU-108
Teledyne TSSDMS-05 · DMS-10 · DMS-25 · DMS-525 · DMS-550
EdgeTechMRU-333 · 333G · 333D
OthersInertialLabs MRU-2B Basic · Vectory Horizon-505 / Horizon HD · SBG Ekinox-M
For selection you needinstalled model · operating mode · mounting and axles · power supply · output interfaces · composition of the on-board system
Material "Re-equipment" ↗
06 / PARTNERS
The maritime sector.
Engineering partnerships.
Shipbuilding, ship automation, navigation and marine technologies. Partners MARO Sensor.
