Tunnel Thruster

The tunnel bow thruster is the most proven and efficient way to generate transverse thrust.
The propeller, mounted in a circular tunnel, delivers direct thrust to port or starboard with exceptional efficiency per kilowatt.
The result: powerful, precise manoeuvrability — exactly when it’s needed most.

Kalkman tunnel bow thrusters are available with power ratings up to approximately 1,250 kW and propeller diameters up to 2,000 mm.
Their compact design, robust construction and long service life make them suitable for a wide range of vessel types, including tugs, inland vessels, workboats, patrol craft, fishing vessels and seagoing ships.

Each installation is equipped with an advanced control system, ranging from simple joystick operation to fully integrated PLC control.
Through remote access, our technicians can provide service, optimise settings or analyse faults — quickly and anywhere in the world.
In this way, the Kalkman tunnel bow thruster combines proven mechanical reliability with modern technology and remote service capability.

Related products

Azimuth Thruster

360° steerable propulsion for maximum manoeuvrability – available as L-Drive or Z-Drive, prepared for DP and autonomous operation.