Surfbee Flow Finder II

This vessel is designed specifically for Sontek RS5 deployment, taking advantage of the ADCP’s new small form factor and depth range. It offers superior shallow water performance, propelled by three underwater thrusters, and features autonomous lateral movement for unparalleled vessel control in difficult conditions, such as windy, slow moving irrigation channels.

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Key specifications:

  • Dimensions: 1.2m x 0.7m x 0.1m

  • Weight: 11kg (without batteries)

  • Max speed: 1.8 m/s forward, 0.8 m/s lateral (sideways)

  • Minimum depth: 0.14m

  • Max. Payload: up to 8 KG
  • Temperature Range: -10°C to 45°C


  • Inflatable hull for easy transportation, storage, and replacement

  • Real-time boat telemetry data with battery level and GPS location

  • GNSS with multi-constellation, multi-frequency, high precision positioning, and heading.

  • Onboard camera with live streaming to transmitter for situational awareness

  • Common power tool battery compatibility

  • Waypoint navigation and programming via Surfbee App

  • Position hold (automatically holding position midstream)

  • Return to home via command or low battery

  • Long-range (1km) transmitter, dust and spray-proof with USB-C charging

  • Specific ADCP Surfbee App functions for autonomous gauging, moving boat, and stationary method

  • RTK via NTRIP providers for precise positioning in the Surfbee App (requires internet connection via Wifi or 4G)



  • Surfbee Multiport: Advanced Sensor Integration Hub with GNSS RS232 Transmission (including heading), Power Supply, and Expandable Outputs

  • Custom Sensor Integration

  • RTK Base Station (Relative RTK for connectivity-independent accuracy)

  • Splitter Cable for Sontek M9 and PCM with Surfbee Multiplug

Autonomous Gauging

Take advantage of GPS autonomous gauging, Allowing the Hydrographer to concentrate on the data not the deployment.



  • Steering Redundancy

  • Position Hold Mid Stream

  • Common Battery

  • ADCP or Transducer

  • Specific Mounts.

  • Autonomous Transects (Moving Vessel and Stationary)

  • Waypoint Mission Planning


  • Surfbee Powered ADCP

SURFBEE – USV Brochure – Series 2 (NZ)

Surfbee – Product Selection Guide – Series 2

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