The controlling blade angle of a controllable pitch propeller enables the vessel to move forward or backward and stop more easily. When used with a side thruster, controllable pitch propellers are convenient when vessel speed needs to be changed frequently when entering or leaving port, leaving shore, or docking. In the case of an emergency stop, this type of propeller can immediately respond from full forward to full reverse movement.
Advatages of a Controllable Pitch Propeller: