01 — VEHICLE
Vehicle size and mass
Estimate dry mass, submerged buoyancy, payload and drag-producing attachments such as cameras, manipulators and tether-management hardware.
ROV propulsion guide
How to choose an underwater thruster for an ROV.
The right thruster is a vehicle-level decision: thrust, voltage, rotation, depth rating, control electronics and mounting all work together. Use this guide to prepare a useful specification before selecting a Blu-Sub thruster with Vebix Automation.
Start with the mission
Define what the vehicle must do before choosing a model.
Inspection, research, intervention and student ROVs have different propulsion needs. Record the intended operating environment and payload first, then compare the available propulsion options against that requirement.
02 — MANOEUVRING
Thrust and layout
Define whether the vehicle needs horizontal propulsion, vertical heave, vectored thrust or redundancy across multiple motors.
03 — ENVIRONMENT
Depth and water conditions
Confirm the required operating depth, water temperature, salinity and likelihood of weeds, debris or sediment around the propeller.
Selection criteria
Six checks for an underwater-thruster shortlist.
01
Voltage system
Match the thruster to the vehicle power architecture. Separate 12V and 24V systems have different motor and performance options.
02
Thrust requirement
Use required forward, reverse and vertical control performance—not peak thrust alone—to select the number and type of thrusters.
03
ESC arrangement
Decide whether an external ESC suits the electronics layout or whether an integrated-ESC thruster simplifies vehicle wiring.
04
Rotation direction
For multi-thruster vehicles, specify clockwise and counterclockwise propeller rotation to balance reaction torque and match the layout.
05
Depth rating
Confirm that the pressure rating is appropriate for the operating envelope, rather than selecting around surface testing alone.
06
Integration details
Check mounting pattern, cable routing, penetrators, connectors, guard options and compatibility with the frame and enclosure design.
Blu-Sub platform comparison
Start a conversation with the right platform family.
| Platform | Typical selection context | Configuration question |
|---|---|---|
| Blu-Thrust Z60 | Compact ROVs, diver-propulsion vehicles and student prototypes. | Is an external ESC appropriate for the electronics layout? |
| Blu-Thrust Z60E | Compact platforms where integrated speed control can simplify wiring. | Does the vehicle benefit from an integrated ESC? |
| Blu-Thrust Z80-170 | 24V ROV, USV and underwater-robotics platforms requiring higher thrust. | What propeller rotation and controller arrangement are required? |
| Blu-Thrust Z80 / Z80E-290 | 12V vehicle power systems requiring high-thrust propulsion. | Should the platform use the external-ESC or integrated-ESC variant? |
Prepare your enquiry
Send this information for a faster recommendation.
- Vehicle type, use case and expected operating depth
- Required number of thrusters and preferred mounting layout
- Battery voltage, available current and controller preference
- Target thrust or the vehicle mass/payload information needed to assess it
- Quantity required and the project delivery location in India
Sources & basis
What this is based on.
- Thrust, voltage, depth rating and ESC configuration figures for the Blu-Thrust range as published in the Vebix Automation catalogue.
- Thrust scales with the square of propeller speed and is quoted at a stated voltage; figures at other voltages are not interchangeable.
Published 6 August 2026. Last revised 16 August 2026. Corrections to sales@
Need help selecting a configuration?
Discuss your ROV thruster requirements with Vebix Automation.
As an authorised Blu-Sub dealer, Vebix can help compare available options and provide a quote against your application and quantity requirements.