In order to maintain good working condition and stability of the ship, regular maintenance and repair of the hull are necessary. Ship maintenance mainly includes cleaning and painting of the hull surface, inspection and repair of the hull structure, and maintenance of the ship's sealing system.

When carrying out bottom repairs, it may be necessary to lift the hull for cleaning, spraying anti fouling paint, or welding repairs at the bottom. Spiral jacks are used to lift the hull and provide necessary support. When reinforcing, strengthening, or repairing the structure of the hull, spiral jacks are used to lift, support, and maintain the position of the hull for necessary work. Spiral jacks are used to lift specific parts of the hull for cleaning paint and anti-corrosion treatment. Spiral jacks have strong support and are easy to operate, and can safely lift heavy objects as long as they are operated according to the required specifications.

Spiral jacks play a critical role in the process of ship maintenance, used to lift and support ship components that need to be replaced, such as propellers, anchors, propellers, etc. The strong support force of spiral jacks also allows for precise height adjustment to ensure the stability and safety of the ship during repair and maintenance.