Ancillary devices (INS, SVS, GNSS)

Using the Bathyswath system only is not sufficient for performing bathymetric surveys. Some ancillary devices are indeed required and it consists of:

  • A good Inertial Measurement Unit (IMU) for measuring ship's motion or ideally, if you have the budget for it, a good Inertial Navigation System (INS)
  • A Sound Velocity Sensor (SVS) for measuring Speed of Sound (SoS) at the transducer level and, ideally, a Sound Velocity Profiler (SVP) for measuring the SoS in the water column
  • A Global Navigation Satellite System (GNSS) receiver for measuring ship's position with ideally 2 antennas for heading information. The ROVER receiver (the one onboard) should also communicate with a  BASE receiver [differential GPS (dGPS) using Real Time Kinematic (RTK) technology] or use any other technique to enhance the precision of position data like for instance Local-Based Augmentation System [LBAS], Satellite-Based Augmentation System [SBAS (WAAS, EGNOS, MSAS, GAGAN, MTSAT, StarFire and OmniStar)], beacons, etc.
  • A gyrocompass if your GNSS receiver is not equipped with 2 antennas for heading information

If the customer asks for it, we can supply a complete bathymetric survey system with all required ancillary devices, have a look on the following page for the products we can propose

Please note that Bathyswath-2-UW is a fully integrated system (Unlike Bathyswath-1 or SWATHplus); it can include a Valeport miniSVS, an Ekinox-E INS and an H320 GNSS reveiver