Inertial Labs MRU-PDS Subsea MRU

Inertial Labs MRU-PDS Subsea MRU

The MRU-PDS dual antenna subsea MRU from Inertial Labs is a professional motion reference unit (MRU) that contains 3 solid state, ultra-high performance MEMS accelerometers, magnetometers, MEMS gyroscopes and barometric sensors. This model also includes a built-in, dual antenna GNSS receiver with DGPS and RTK.



The MRU-PDS dual antenna subsea MRU from Inertial Labs was developed to meet requirements for vessel navigation, survey on autonomous vessels and dynamic positioning systems. This MRU is an enhanced, high-performance strapdown motion sensor, that determines pitch & roll, heave, sway, surge, accelerations, angular rates, heading, velocity and positioning for any device on which it is mounted.

The MRU-PDS utilizes 3-axis solid-state precision accelerometers, magnetometers, gyroscopes and barometric sensors to provide accurate heave, sway, surge, pitch and roll of the device under measure.

Integration of these very low noise gyroscopes allow for output which provides high frequency, real-time rotation measurement for vessels, ships, helidecks, ROV, marine antennas or cranes over all three rotational axis.

The new generation of Inertial Labs MRUs are an ideal solution for demanding applications. Their electronic nature solves the problems associated with expensive mechanical gyro solutions, as well as fiber optic gyro (FOG) technology. These high-end MRUs feature MEMS gyros that lead the sector in both accuracy and reliability.


  • 3-in-1 solution includes MRU + DGPS/RTK + HDT
  • Kongsberg/Seatex, SMC and TSS data formats
  • Compatible with SBES/MBES
  • Input from DVL – Doppler Velocity Log
  • IHO SP44 standard compliant
  • 5 cm heave accuracy
  • 5 cm surge and sway accuracy
  • 0.05 deg heading accuracy
  • 0.02 deg pitch & roll accuracy
  • 0.005 m/sec2 acceleration accuracy
  • 0.0002 deg/sec Angular rate accuracy
  • NMEA 0183, TSS1 output data format
  • Built-in dual antenna GNSS receiver tracking GPS, GLONASS, Galileo, BeiDou, SBAS, DGPS and RTK

Technical Specifications

Heave:5% / 5 cm
Pitch & Roll:0.02 deg
Heading:0.5 deg (dual antenna GNSS)
Position:40 cm (DGPS)
1 cm (RTK)
Size:120 mm x 50 mm x 53 mm
Weight:320 g
Supply Voltage:9 – 36 VDC
Power Consumption:2.6 W
Operating Temperature:-40 °C to +70 °C
Storage Temperature:-50 °C to +85 °C
Vibration:IEC 60945/EN 60945


Inertial Labs products are covered under their 15-month standard warranty. Inertial Labs will repair or replace products with design or manufacturing defects, for a period of 15 months from the date of purchase.

Why Buy from Us?

In business since 2004, Canal Geomatics is an authorized dealer for Inertial Labs and has established itself as an industry-leading distributor of high-precision positioning products in North America. Our mission is to find the best solution for each unique application and extend premium support to ensure the long-term success of our customers. We offer both volume and reseller discounts for the majority of our product lines.


The MRU-PDS dual antenna subsea MRU from Inertial Labs is available through Canal Geomatics. If you would like more information about this product, please feel free to get in touch with us by completing the Request Pricing form.