SL40 | Unmanned Surface Vehicle丨OceanAlpha
SL40Y profile

Small Unmanned Surface Vehicle

Multi-Function Small Unmanned Surface Vehicle for Hydrographic Survey

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Fast Switch Between Missions

Instruments, like ADCPs, echo sounders and side scan sonars, with a diameter of 5 cm to 18 cm, can be installed rapidly into the central moonpool, allowing you to switch between missions with ease.

sl40 mbes sl40 with multibeam echo sounder

Multibeam Echo Sounder Solution

In addition to the above instruments, SL40 can also be upgraded to a multi-beam echo sounder solution which has been proven to be highly mature and stable after repeated tests.

The optional MBES model includes R2sonic 2020 and Hydro-Tech YH400P.

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Automatic mission planning

You can pre-program the survey mission with just a few drags and clicks on the base station computer. SL40 carrying instruments can conduct surveys autonomously and send back real-time data.

You can also drive SL40 by a remote controller to reach some difficult corners.

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Intelligent collision avoidance

Equipped with radar sensors, SL40 USV can detect obstacles and avoid collision within 50 meters.

In manual mode, you can observe the water environment via real-time video to improve navigation safety.

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Higher speed & tangling free

The innovative water jet thruster brings SL40 USV to a top speed 5m/s and effectively avoid being entangled by water plants or debris.

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Stable sailing

The trimaran hull design dramatically improves stability when sailing at high speed.


Hull Material Carbon fiber
Dimension (L)165 cm *(W)70 cm *(H)40 cm
Weight 42 kg
Payload 25 kg
Draft 15 cm
Propulsion Electric water-jet propeller
Communication Range Data telemetry: 2 km    Remote Control: 1 km
Max. Speed  10 knots (5 m/s)
Battery Life 8 hrs @ 1.5 m/s


Application Case

  • SL40 Hamburg
    Hamburg Port Authority Uses USV in Hydrographic Survey
  • Technicians controlled the USV manually to acquire data
    SL40 USV Inspects Narrow Pits on Dam Bedrock
  • sl40 wide river survey
    Storm Geomatics Use SL40 in Wide Swath Bathymetric Survey on the River Aire
  • SL40 USV surveying at night
    SL40 & SL20 USV Measure River Velocity With ADCP in Jiangmen
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    USV Assist In Pollution Remediation of Yangtze River
  • SE40 SAMPLING e1562226514983
    USV Conducts Sewage Pipeline Detection and Water Quality Monitoring On A dangerous River Sector
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    SL40 USV Conducts Mutibeam Echosounder Survey With A R2Sonic 2020 MBES
  • SL40 pipeline inspection
    SL40 Unmanned Boat Unveils Illegal Sewage Pipes
  • SL40 USV-8
  • Figure 3. Technicians controlled the USV manually to acquire data
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  • SL40 small unmanned survey vehicle deployed manually
  • SL40 USV-2
  • SL40 USV-2
  • SL40 USV-4
  • SL40 USV-3
  • SL40 USV-5
  • SL40 USV-6
  • SL40 unmanned surface vessel with POS and side scan sonar
  • SL40 unmanned surface vehicle/drone boat with side scan sonar


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    An auto-pilot one-man operation platform for ADCPs


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