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Flow Series

A platform for multi-payload configurations.

Flow Duet is an autonomous surface vehicle (ASV), also known as an uncrewed surface vessel or USV. It supports sensor integration, winch deployment and configurable water-monitoring missions.

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Flow Duet viewed from the front-left in a multi-payload configuration
Multi-payload platformFlow Duet
Minimum operating depth
0.25 m
Hull dimensions (L × W × H)
1.85 × 0.7 × 0.1 m
Weight, no batteries
15 kg
Top speed
4 m/s (7.8 kn)
  1. 01Multi-payload platform
  2. 02Sensor integrations
  3. 03Winch deployment workflows

Mission fit

For bathymetry, water-quality and profiling configurations.

Flow Duet can be configured around bathymetry, water-quality and profiling requirements.

  • Multi-payload
  • Water quality
  • Advanced bathymetry

Configuration

Configure the system around the payload.

Multi-sensor missions have different mechanical, power and data requirements. Review the vessel, mounts, interfaces and software workflow as one configuration.

Configuration workflow

Validate the system before it reaches the water.

Prepare the instrument, configure the mission and operate from shore.

  1. 01

    Define the sensors, payload, target depth and environment.

  2. 02

    Check mounts, interfaces, power and software requirements.

  3. 03

    Configure the mission and complete field checks.

  4. 04

    Launch, monitor and collect data using the configured workflow.

Platform architecture

Core platform components.

Flow Duet combines the following hardware and operating capabilities.

  • Inflatable PVC drop-stitch hull
  • T600 brushless thrusters
  • Surfbee pod for batteries and autopilot
  • GNSS antennas and front camera with LEDs
  • Universal sensor and accessory mounts
  • Multiport interface, transmitter and Surfbee App

Winch deployment

Sensor compatibility

Dual payload. SonTek M9, SonTek RS5, SonTek S5, SonTek PCM, Teledyne RiverPro, YSI EXO sonde, Airmar SS510 EchoRange+, Cerulean Sonar Sounder S500. Documented combinations include M9 with PCM plus EXO, and RS5 plus EXO

Coming soon: integration with Cerulean Sonar Omniscan 450 SS side scan and Cerulean Sonar Surveyor 240-16 MBES multibeam. Model availability will be confirmed at release.

Explore accessories

Published specifications

Dimensions and performance.

Hull height refers to drop-stitch thickness, excluding the mast and fitted sensor. All four models use the same transport bag.

Hull dimensions (L × W × H)
1.85 × 0.7 × 0.1 m
Transport bag (L × W × H)
90 × 45 × 50 cm
Weight, no batteries
15 kg
Minimum operating depth
0.25 m
Maximum payload
up to 12 kg
Top speed
4 m/s (7.8 kn)
Operating temperature
-10 °C to +45 °C
Hull
Inflatable PVC drop-stitch
Thrusters
2 × T600 plus T300 rear centre
Positioning
Dual GNSS with heading, standard
Dedicated lateral movement
No
Sensor compatibility
Dual payload. SonTek M9, SonTek RS5, SonTek S5, SonTek PCM, Teledyne RiverPro, YSI EXO sonde, Airmar SS510 EchoRange+, Cerulean Sonar Sounder S500. Documented combinations include M9 with PCM plus EXO, and RS5 plus EXO

Figures describe the standard product. Speed, payload and operating depth vary with the instrument fitted and the conditions on the day.

Compare the range

See how the other models differ.

Compare the mission and instrument workflow, then confirm the model, mount, cable and accessory configuration with Surfbee.

Versatile survey platform

Flow Seeker

Best suited to teams working across several survey workflows.

Compact low-flow platform

Flow Scout

Best suited to low-flow work that requires lateral control.

Ultra-compact platform

Flow Finder

Best suited to fieldwork centred on the SonTek RS5.

Compare all four models

Technical consultation

Review a Flow Duet configuration.

Tell us about the instruments, payload, target depth and operating environment. Our team will help define the complete Flow Duet setup.

Talk to a technical specialist