OceanAlpha Group Ltd.

OceanAlpha Group Ltd.

- Model SL20 - Autonomous Survey Boat



A compact and portable unmanned surface vessel for for hydrographic and bathymetry surveying.

The 177 mm-wide moon pool supports flexible deployment of different instruments like ADCPs and echo sounders.

  • The SL20 USV supports both remote control mode and auto-pilot mode, performs great line tracking capability.
  • The base station can be easily set up on field, data can be transmitted in real time.

  • The SL20 USV is 1 meter long and weights 17 kg, it’s easy for one man to operate and transport.
  • Powerful battery and low power consumption supports 6 hours of endurance at 3 knots.

With an extremely low draft of 15cm, the SL20 USV allows you to survey freely on offshore coasts, shoals and reefs where traditional manned vessel unable to enter.

  • Waterjet  propulsion system drives the maximum speed to 5m/s
  • Safety protection avoids the propellers being intertwined with water plants or water debris.

  • Hull Material: Carbon Fiber
  • Hull Length: 105 cm
  • Hull Width: 55 cm
  • Weight (excl. ADCP): 17 kg
  • Payload: 8 kg
  • Propulsion: Waterjet
  • Moon Pool: 177 mm
  • Remote Control: Radio Frequency
  • Remote Control Frequency: 900 MHz/ 2.4GHz
  • Remote Control Range: 1km
  • Data Telemetry Frequency: 2.4GHz/ 5.8 GHz
  • Data Telemetry Range: 2 km
  • Survey Speed: 2-5 knots (1-2.5m/s)
  • Top Speed: 10knots (5m/s)
  • Battery Endurance: 6 hours @ 1.5m/s
  • Battery Pack:
    • 1 x 33V 40Ah
    • Quick Battery Replacement
    • Sontek RiverSurveyor S5/M9
    • Teledyne RD Instruments RiverRay
  • Instrumentation:
    • Teledyne RD Instruments RiverPro
    • Teledyne RD Instruments RioPro
    • Teledyne RD Instruments StreamPro
  • Options:
    • Linkquest Flowquest
    • ADCP telemetry module

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