SL20Y | Unmanned Surface Vehicle丨OceanAlpha
SL20Y 1

Remote Control Survey Boat

The most affordable minimum size surveying USV for one-man operation

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Dedicated pool for different ADCPs

The 177mm-wide moon pool supports flexible deployment of different ADCPs.

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Flexible operation with remote controller

The SL20Y USV is controlled by a remote controller so that the operator can enjoy a higher level of flexibility and safety in harsh working environment.

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Adaptable to extremely shallow water

With an extremely low draft of 15cm, the SL20Y USV allows you to survey freely on offshore coasts, shoals and reefs where traditional manned vessel unable to enter.

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Compact and portable

The SL20Y USV weighs only 15kg and is 105cm long, so it can be carried by one person and transported around in the trunk of a car.

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High speed and tangle free

The innovative propeller system allows the SL20Y USV to sail at 5m/s at highest without worrying about being entangled by water plants or rubbishes.


Hull MaterialCarbon Fiber
Dimension(L)105 cm *(W)55 cm *(H)35 cm
Weight (excl. ADCP)14 kg
Payload10 kg
Draft15 cm
PropulsionWater-jet propulsion
Moon Pool177 mm
Remote Control FrequencyRadio Frequency, 900 MHz/ 2.4GHz
Communication Range1 km
Survey Speed2-5 knots (1-2.5m/s)
Max. Speed10 knots (5 m/s)
Battery Life2 hours (2.5 m/s)
Battery Pack1 x 33V 40Ah
Quick Battery Replacement
InstrumentationSontek RiverSurveyor S5/M9
Teledyne RD Instruments RiverRay
Teledyne RD Instruments RiverPro
Teledyne RD Instruments RioPro
Teledyne RD Instruments StreamPro
Linkquest Flowquest
OptionsADCP telemetry module


Application Case

  • water discharge
    SL20 USV Conducts Topographic Survey To A River Section
  • SL40 USV surveying at night
    SL40 & SL20 USV Measure River Velocity With ADCP in Jiangmen
  • sl20
    SL20 Unmanned Boat Surveys Three Plateau Glacial Lakes in Tibet
  • SL20 in France 5
  • SL20 in France 4
  • SL20 in France 3
  • SL20 in France 2
  • SL20 in France 1
  • SL20 in France


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