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A propeller is a rotating fan-like structure that uses the power generated and transmitted by the ship's primary engine to drive the boat.
The transmitted power is transferred from rotational motion to thrust, which imparts momentum to the water and causes a force to act on the ship, propelling it ahead.
Depending on the vessel's speed and maneuvering requirements, a ship can have one, two, or even three propellers. A pressure differential develops on the forward and aft sides of the blades, propelling water behind the aluminum blades. Marine propellers are made of corrosion-resistant materials since they are in seawater, which accelerates the corrosion process.
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