SL20 USV
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Overview
One-person portable hydrographic survey USV for bathymetry and flow measurement in shallow inland waters.
SL20 USV is a civilian USV platform developed by OceanAlpha in China. One-person portable hydrographic survey USV for bathymetry and flow measurement in shallow inland waters. It is positioned for bathymetric survey, water discharge measurement, hydrographic survey, and shallow-water survey and is listed publicly as active. Published specifications captured in this database include a published length of about 1.05 m, reported endurance of 6h @ 3 kn, reported speed of Max speed 8 kn; survey speed 3 kn, and payload information listed as 10 kg; SBES, ADCP, RTK GNSS, and water-quality payload support via 177 mm moon pool. The platform is described as remote control / autonomous in terms of control and autonomy. Its concept emphasizes persistent on-water presence, modular payload integration, and lower operating burden than a comparable crewed craft. Additional context: OceanAlpha's 2025 brochure lists 1 km remote-control range, 2 km telemetry range, real-time video, collision avoidance, and a 33.6V/40Ah swappable lithium battery; the product page also highlights a 15 cm draught and carbon-fiber hull.
Primary Roles
Notes
OceanAlpha's 2025 brochure lists 1 km remote-control range, 2 km telemetry range, real-time video, collision avoidance, and a 33.6V/40Ah swappable lithium battery; the product page also highlights a 15 cm draught and carbon-fiber hull.