What is the primary purpose of the ship's main jacking gear?

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The primary purpose of the ship's main jacking gear is to prevent the hull from bending. This system is crucial during maintenance operations, particularly when the ship is in dry dock. The jacking gear ensures that the hull maintains its structural integrity while workers perform repairs or inspections on the underwater portions of the ship.

Maintaining the shape and alignment of the hull helps to prevent structural issues that could arise from improperly supported sections. By keeping the hull from bending or distorting under its own weight or during maintenance activities, the jacking gear plays an essential role in preserving the overall durability and seaworthiness of the vessel.

While the other functions listed—such as controlling propulsion, assisting in emergency steering, or reducing vibration—are important for different ship systems, they are not the primary function of the jacking gear, which is specifically designed to support and stabilize the hull structure during maintenance and construction activities.

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