Suzhou Cosc side thrusters refer to main‑propulsion controllable‑pitch propellers. The main‑propulsion controllable‑pitch propeller consists of five major components or systems: propeller blades, hub mechanism, oil distributor, hydraulic system and electronic remote‑control system. The blades are not fixed to the hub and can rotate about an axis perpendicular to the propeller shaft. The actuating mechanism inside the hub rotates the blades to change the pitch angle, thereby varying the magnitude and direction of thrust to meet the vessel’s requirements for forward navigation, astern navigation, stopping and speed variation.

Rudder‑propeller Units 

According to Suzhou Cosc, the rudder‑propeller unit is a propulsion solution that replaces the conventional combined propeller‑rudder system with an integrated propeller‑rudder design. By rotating the rudder‑propeller unit 360° freely around the vertical axis, the vessel can obtain maximum thrust and steering performance in all directions.

Side‑thruster System 

Side thrusters are generally fitted at the bow and stern to generate transverse thrust for vessel steering and sideways movement. When vessel speed is low and steering efficiency of the main rudder drops, side thrusters maintain good manoeuvrability. They can also supply thrust to assist vessel positioning. Especially within narrow harbours, they enable fast and flexible berthing and unberthing operations.

Marine Electric Propulsion System 

As stated by Suzhou Cosc, the marine electric propulsion system is a high‑tech modular system. The complete system normally comprises major modules including main power station, converter power station, harbour‑service power station, high‑voltage frequency converter, podded electric thrusters, bow side thrusters, as well as a LAN‑based system control and monitoring network.

The podded electric thruster adopts a co‑axial layout for the propeller and propulsion motor with no intermediate transmission links, delivering a simple and compact structure. It offers high operational flexibility; it can be installed prior to vessel sea trials and even mounted or dismounted at sea. Compared with conventional marine thrusters, podded electric thrusters feature high propulsion efficiency, saved cabin space, simplified installation, flexible space arrangement, low noise and low vibration.

Water‑jet Propulsion System 

Per Suzhou Cosc, the water‑jet propulsion system generates high‑pressure high‑speed water flow ejected through nozzles to produce powerful reaction thrust for the vessel. Rotation of the valve shaft of the steering valve changes the water‑discharge direction, enabling the vessel to move forward, steer or go astern for course adjustment. Boasting easy‑and‑flexible operation and low‑noise performance, it is suitable for shallow‑draft navigation and widely applied in lakes, shoals and other waters.