SL20 profile

Autonomous Survey Boat

A compact and portable unmanned surface vessel for hydrology and bathymetric survey

SL20 ADCP background

Moon Pool Design

  • The moon pool supports flexible deployment of different instruments like ADCP and echo sounder. 
base station 21 e1553849027374

Autonomous Survey and Realtime Data Telemetry

  • Both remote control and autonomous available, great line tracking capability.
  • Base Station ensures easy setup on field, real time data telemetry.
SL20 in back trunk 1  e1553840467701

Compact and Long Endurance

  • SL20 is 1 meter long and weights 17 kg, it’s easy for one man to operate and transport.
  • Powerful battery and low power consumption provides 6 hours of endurance at 3 knots.
SL20 04 water e1551862124105 SL20Y 1 e1553842724946

Low Draft and Shallow Water Adaptability

With a low draft of 15 cm, the SL20 delivers perfect performance in shallow water survey.

SL20 06 speed  e1553840009168

High Speed and Well Protected Propulsion

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


Hull MaterialCarbon Fiber
Hull Length105 cm
Hull Width55 cm
Weight (excl. ADCP)17 kg
Payload8 kg
Moon Pool177 mm
Remote ControlRadio Frequency
Remote Control Frequency900 MHz/ 2.4GHz
Remote Control Range1km
Data Telemetry Frequency2.4GHz/ 5.8 GHz
Data Telemetry Range2 km
Survey Speed2-5 knots (1-2.5m/s)
Top Speed10knots (5m/s)
Battery Endurance6 hours @ 1.5m/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

  • sl20
    SL20 Unmanned Boat Surveys Three Plateau Glacial Lakes in Tibet
  • SL20 in France
  • SL20 in France 1
  • SL20 in France 2
  • SL20 in France 3
  • SL20 in France 4
  • SL20 in France 5
  •  20181129171526 e1551691689982
  • .15 e1551691713376
  • .14 e1551691703666
  •  e1551691790339
  • .19 e1551691752644
  • .17 e1551691742370
  • sdrftgyhuj2.20 e1551691765188
  •  e1551691776264


Related Product

  • alt=

    Screw high speed platform for water discharge and bathymetry measurement

  • alt=

    The most affordable and minimum sized surveying platform