THURN SL40 Bathymetry USV

A fully autonomous USV-carried Sub bottom system for rapid low-logistics surveying in dams, rivers and coasts. Suitable for deployment in shallow and high speed waterways.

THURN SL40 Bathymetry USV image

The THURN ... System provides all the tools for your USV sub bottom requirements. Supplied with a GeoAcoustics GeoPulse compact and an Valeport sound velocity sensor all of which come fully integrated. Then, your choice of multibeam sonar and positioning equipment. This system was designed to enable remote surveys, keeping people out of the water and minimising risk.

Thus decreasing survey time and enabling surveys in previously inaccessible and dangerous waters. With easy to use industry standard software options this will help solve your hydrographic and survey safety problems. The software will track and display the position of the USV in real-time, with a real-time data feed option.


- Autonomous map-based survey patterns ensuring full coverage of larger areas

- Quick set up for survey operations

- Individualised incident projects

- Increased situational awareness and safety of operations


- Ports, Harbours and Dredging

- Underwater Archaeology

- Sunken Timber Recovery

- Search & Recovery

- Surveying

- Law Enforcement Work

- Scientific Research

- Environmental Survey


- Hull Material - Carbon fiber

- Dimension - (L)160 cm *(W)70 cm *(H)40 cm

- Weight - 35 kg

- Payload - 15 kg

- Draft - 15 cm

- Propulsion - Electric water-jet propeller

- Communication Range - Autopilot: 2 km Remote Control: 1 km

- Max. Speed - 12 knots (6 m/s)

- Battery Life - 6 hours @1.5 m/s

Contact us to discuss your requirements

Key Features

  • Self-contained integrated USV system. Can be supplied with an SL40 or fitted to an existing asset
  • Automated survey patterns enable sensitive change detection due to surveys being easily repeatable
  • Optional real time display of the data provides immediate feedback from the survey team to ensure that the entire area has been covered
  • Options for Kongsberg, Norbit or Geoswath multibeam sonars
  • All search data is stored to allow post-mission analysis of the search to assist in reporting and improve search operations
  • Reliably survey shallow and high speed waters

Options Include:

  • GNSS (RTK, SmartNet)
  • AML sound velocity sensor
  • Valeport SVP
  • Imagenex side scan
  • Kongsberg M3 sonar
  • Norbit WBMS
  • Geoswath GS4