Hydrography
Accurate measurements of roll, pitch, and heave are crucial for achieving optimal results when compensating multibeam echosounders for vessel motion.
Hydrography
Designed specifically for marine applications
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.
Read more about the MRU MarineSonar systems that use our MRUs
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Related questions
- Read the full answer
The MRU Marine is IP-68 rated with Lemo connectors and LEDs. The Marine SW supports 50m depth, uses SubConn connectors, and comes in two versions differing by available output combinations.
- Read the full answer
A gyrocompass determines true north using gyroscopes and Earth's rotation, not magnetism. It’s essential for heading accuracy in marine and aerial navigation, though performance may vary at extreme latitudes.
- Read the full answer
A Vertical Reference Unit (VRU) is an advanced device that measures the attitude of an object, specifically its Roll and Pitch.
Further reading
Advanced motion compensation for sonars introduced at Ocean Business 2025
MRUs for vessel performance optimisation in focus at Europort 2025
Research Project to Test Value of MRU Data for Vessel Performance and Carbon Reduction
Related products
Usage area
6000 m depth
Connectors
SubConn 8
Roll & Pitch accuracy
- 3000±0.05°
- 6000±0.02°
- 9000±0.01°
Heave accuracy
5 cm or 5.0%
Usage area
50 m depth, IP 68
Connectors
Lemo or SubConn 8 or SubConn 16
Roll & Pitch accuracy
- 3000±0.05°
- 6000±0.02°
- 9000±0.01°
Heave accuracy
5 cm or 5.0%