The stern roller is widely used in ship towing, anchoring of oil platform, ship salvage, and cable laying, etc. Feature of Marine Stern Roller: Reduce sliding frictional drag of cable rope or anchor chain passing through a stern roller. Extend the service life of cable rope or anchor chain.

A fixed, annular forward extending duct around the propeller. The propeller operates with a small gap between blade tips and the nozzle internal wall, roughly at the narrowest point. The nozzle ring has a cross-section shaped as a hydrofoil.

The stern tube is a hollow tube which accommodates the bearings, the seal boxes and the propeller shaft. The stern tube is filled with oil, grease or water and forms a barrier between the water outside and the engine room inside the vessel.

It provides the necessary power to move the vessel forward and is usually located in the engine room at the bottom or stern of the ship. There are various types of ship engines, including steam engines, internal combustion engines (diesel, gasoline, or natural gas), gas turbine engines, and electric motors.