According to Suzhou Cosc, with the growing number of port‑operation vessels, exploration vessels, offshore engineering vessels, research vessels, multi‑purpose tugs, high‑speed ro‑passenger ships and military vessels, the outfitting rate of special thrusters has gradually risen.

The propulsion system for special‑purpose vessels constitutes the core component of the whole vessel. While supplying power for the ship, it also bears on the vessel’s operational stability, safety, energy‑saving performance and economic efficiency.

As noted by Suzhou Cosc, special‑vessel propulsion systems integrate mechanical systems such as propeller blades, hubs and shafting, together with electric‑control systems including electronic remote‑control units and operating consoles. Applicable to various types of vessels, especially special‑purpose craft, they deliver more flexible and energy‑efficient propulsion power.

At present, main types of special‑vessel propulsion systems include main‑propulsion controllable‑pitch propellers, rudder‑propeller units, side controllable‑pitch thrusters, electric thrusters and water‑jet thrusters. Compared with conventional marine propulsion systems, special‑purpose thrusters improve vessel manoeuvrability, facilitate sailing along specific water‑borne trajectories, and provide propulsion assurance for special missions of special‑purpose vessels.

Suzhou Cosc Marine Machinery Co., Ltd. (abbreviated as COSC) is a manufacturer specializing in side thrusters (CP and FP), rudder propellers and main‑propulsion controllable‑pitch propellers (CPP). By introducing advanced foreign technologies and production‑management approaches, together with a responsive and comprehensive after‑sales‑service system, the company has won high recognition from customers at home and abroad.

Side Thrusters: divided into controllable‑pitch (CP) side thrusters and fixed‑pitch (FP) side thrusters. Electric motors are commonly adopted as prime movers; diesel engines and hydraulic motors can also be used for driving.