Tunnel / Steering Grid Combination Bow Thruster

To enable a bow thruster to be used as an auxiliary propulsion system, Kalkman has developed a special type of thruster that can actually propel the vessel.
This system combines the characteristics of a Tunnel Bow Thruster and a Steering Grid Bow Thruster in one compact and versatile design.

A vertically mounted propeller operates within a tunnel and directs the water flow through a 360° rotatable steering grid, providing thrust in any direction – not only transverse, but also forward and astern.
When operating astern, the steering grid also functions as a rudder, offering additional control at low speeds or during emergency propulsion.

The combination thruster is:

• Suitable for operation in shallow water

• Usable as an emergency or auxiliary propulsion system

• Effective at full sailing speed

• Available in power ratings up to approximately 750 kW

With this unique development, Kalkman offers a system that combines full 360° thrust, maximum reliability, and flexibility – ensuring safety and manoeuvrability under all operating conditions.