Download the full case study here
The accuracy of MRUs can be enhanced by the use of other external sensors, such as an external GNSS receiver, a stand-alone magnetic compass (SAMC), the vessel’s gyrocompass, or a Doppler Velocity Log (DVL). The latter three are particularly useful for supplying important heading corrections in GPS-denied environments, as they do not rely on satellite line of sight (LoS).
Inertial Labs’ MRU-PD can receive data from a wide range of sensors used throughout the industry. It also offers full compatibility with both single and multi-beam echosounders (SBES/MBES). Unlike a SBES, an MBES utilizes multiple acoustic transducers arranged radially to increase the swath width when performing surveys, allowing more data to be collected in a single pass. The MRU-PD is also designed to easily interface with the popular post-processing software packages such as HYPACK, Qinsy and Qimera.
Inertial Labs’ MRU-PD motion reference units output:
- Pitch and roll
- Heave, sway and surge
- Accelerations (X, Y and Z axes)
- Angular rates (about X, Y,and Z axes)
- Heading, velocity and positions
Featuring heave accuracy of 0.05 meters and pitch and roll accuracy of 0.02 degrees, the MRU-PD has been recognised by the American Bureau of Shipping as suitable for use with Dynamic Positioning Systems (DPS-1, DPS-2 and DPS-3).
To find out more about the use of inertial motion reference units for marine surveys, download the full case study here.
