Jet Thruster Calculator

Boat Length Icon
Vessel Length (in meters) i
Measure the entire length of your vessel, including any extensions. This value should be the overall length that contributes to wind resistance and maneuverability.

Length over all, including extensions

Boat Height Icon
Height Above Water Line (in meters) i
Take into account everything above the waterline that is exposed to wind. This includes the superstructure, rigging, and other parts, but not the full height of the mast. Estimate an average height of structures that contribute to wind capture.

Average the cross-section of rigging and superstructure

Boat Wind Calculator
Wind Capture i
Choose the wind force with which you intend to navigate safely. Consider that wind conditions vary, and the Jet Thruster is an assistive tool, not a full steering system.

Anticipated conditions in knots/Beaufort scale

5 BFT

Fresh Breeze

[17-21kn]

6 BFT

Strong Breeze

[22-27kn]

7 BFT

High Wind

[28-33kn]

Note: Small consistent forces move large vessels, but strong cross-currents may require greater thrust for any vessel.