Abstract
It is well known that a controllable pitch propeller (CPP) can provide smooth speed control. On the other hand, unstable yaw moment is often exerted during the stopping maneuver of ships with single CPP and single rudder, which introduces a significant reduction in maneuverability, and, under this condition, it is difficult to control CPP ships by steering. A simulation study has been performed in order to investigate the effective ship-handling method in a harbor to control the unstable stopping motion of CPP ships. Based on the results of the simulation study, the authors propose an effective ship-handling method that applies turning moment to the ship by maximum rudder angle steering prior to the reversing operation of the CPP. And it is confirmed that the unstable stopping motion of CPP ships can be controlled sufficiently by the proposed method. The proposed ship-handling method is applicable to the ship-handling for anchoring under windy condition and crash astern maneuver in a harbor area.
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