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Seapath 380

Position, attitude, time and heading sensor

The Seapath 380 series uses a state-of-the-art dual frequency GNSS receiver, inertial technology and processing algorithms to provide surveyors with the best possible accuracy in position, attitude and timing. All available GPS, GLONASS, Galileo, Beidou and QZSS satellites are used in the position solution.

Advanced Navigation Integration

The advanced Seapath navigation algorithms integrate RTK GNSS data with the inertial sensor data from the MRU. This gives the Seapath 380 unique advantages compared to stand-alone RTK products. The Seapath product’s accurate roll, pitch and heading measurements allow the RTK antenna position to be referenced to any point on the vessel where accurate position and velocity are required. All data from Seapath have the same time stamp and the output is in real-time.

Functional Design and System Configuration

This Seapath series is a two-module solution with a processing unit and a HMI unit connected via Ethernet. The processing unit runs all critical computations independent from user interface on the HMI unit to ensure continuous and reliable operation. The Seapath is operated through the operator software installed on one or several HMI units. This software is used for performance monitoring, configuration and troubleshooting of the system.

Product Range and Applications

The Seapath 380 series is delivered in a range of models with varying roll/pitch and heading accuracies, meeting diverse operational needs. The latest software includes features such as Automatic Online Calibration (AOC), enhancing roll and pitch accuracy without needing recalibration of the IMU in motion. The Seapath 380 is designed for hydrographic surveying and dredging work demanding the most comprehensive and accurate surveying data available.

Key features

  • 0.007° to 0.02° roll and pitch accuracy depending on model
  • 2 cm heave accuracy by use of the PFreeHeave® algorithms
  • Meets IHO special order requirements
  • Robust against GNSS dropouts due to the inertial sensor part of the product
  • 555-channel dual frequency GPS/GLONASS/Galileo/Beidou receiver
  • All available GPS/GLONASS/Galileo/Beidou/QZSS satellites are used in the positioning solution
  • Includes ionospheric compensation methods to reduce Sunspot 24 cycle effects
  • Fugro XP2/G2/G4/G4+ corrections and RTK supported
  • RTK corrections format RTCM and CMR supported
  • Includes SBAS corrections (WAAS, EGNOS, MSAS, GAGAN)
  • All data have the same time stamp and to an accuracy of 0.001 s to the actual measurement time
  • Logging of raw satellite and IMU data possible


Data sheet

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