Key feature: 1. Combined design propeller and nozzle together, enlarge diameter of propeller and low down its rotate speed, which keep high propulsion efficiency and enhance thrust force; 2. Carefully design the rudder-rod profile and its displace from propeller, which improve RP’spropulsion efficiency and reduce vibration, especially reduce RP’s steering torque; 3. Adopt high-strength gear and bearing of high speed, sealings and pipeling also being carefully design,which improve the system’s reliability and longevity; 4. The steering mechanism can be drived by electrical motor or hydraulic motor; 5. According to the difference of operation condition, it can be divided into three kind: FPP with nozzle, CPP with nozzle, without nozzle. 6. According user’s requirement, RP can Designed to be retractable. Typical application suitable for: tug, harbor service ship, ferry, engineer ship;