The SL20 is a compact, lightweight USV engineered for high-resolution hydrographic and bathymetric surveys in shallow and confined waters. Built for efficiency and portability, it delivers professional-grade performance in a single-operator format.
Key Features:
High-Precision Surveying:
Equipped with a 177 mm moon pool, the SL20 supports a wide range of hydrographic instruments including ADCPs and single-beam echo sounders, enabling flexible, high-accuracy data collection in dynamic environments.
Shallow-Water Optimized:
With a minimal draft of just 15 cm, the SL20 is ideal for ultra-shallow or narrow inland waters where traditional vessels cannot operate effectively.
Portable and Deployable Anywhere:
Constructed with a durable carbon fiber hull and weighing only 17 kg, the SL20 can be launched by one person and transported in a standard vehicle, streamlining field logistics.
Advanced Propulsion System:
Twin ducted thrusters deliver smooth navigation at up to 4 m/s, with 6-hour operational endurance at survey speed (3 knots), supporting extended missions without compromise.
Autonomous & Remote Control Capabilities:
Features fully integrated autopilot and real-time data telemetry over 2 km, allowing for hands-off operation and precise survey line tracking even in challenging conditions.
The SL20 Unmanned Surface Vehicle (USV) is a compact, auto-pilot survey platform designed for one-person operation and rapid deployment in hydrographic velocity and flow measurements, as well as underwater mapping. Built for efficiency, it supports both remote control and fully autonomous missions, making it ideal for professional survey work in varied environments.
A 17.7 cm moonpool allows for flexible integration of a wide range of instruments, including ADCPs and single-beam echo sounders. With real-time data telemetry to the base station, operators can monitor progress and results instantly, whether working in manual or auto-pilot mode.
Weighing just 17 kg and measuring 1 metre in length, the SL20 is lightweight and highly portable, enabling easy transport and operation by a single user. Its power-efficient design supports up to 6 hours of endurance at 3 knots, ensuring reliable performance in the field.
Optimised for extremely shallow waters, the SL20 has a draft of only 15 cm, allowing surveys in areas inaccessible to larger vessels. A duct-type thruster delivers speeds of up to 4 m/s, while built-in propeller protection prevents entanglement with aquatic vegetation and debris.
The SL20 USV combines portability, precision, and autonomy, making it a dependable solution for fast, efficient hydrographic surveys in confined inland waterways to open survey zones.
| Feature | Specification |
| Hull Material | Carbon Fiber |
| Dimensions (L × W) | 105 cm × 55 cm |
| Weight | 17 kg (excluding payload) |
| Payload Capacity | Up to 10 kg |
| Draft | 15 cm |
| Propulsion | Duct-type thrusters |
| Moon Pool Diameter | 177 mm |
| Communication Range | Data Telemetry: 2 km; Remote Control: 1 km |
| Control Frequencies | Remote: 2.4 GHz; Telemetry: 5.8 GHz |
| Survey Speed | 3 knots (1.5 m/s) |
| Maximum Speed | 8 knots (4 m/s) |
| Battery Life | 6 hours at 3 knots |
| Battery Pack | 1 × 33V 40Ah; Quick Replacement |
| Compatible Instruments | SOUTH 18S SBES, Echologger SBES, Hydrobook SBES, Sontek RiverSurveyor S5/M9, Teledyne RD Instruments RiverRay/RiverPro/StreamPro, Linkquest Flowquest |
| Optional Features | ADCP Data Telemetry Module |
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