The anchor chain is a steel chain connecting the hull and the anchor. The main functions of the anchor chain are: connecting the anchor and the ship, transferring the anchor holding force to the hull; when anchoring, the thrown anchor chain has a certain weight, which can buffer the wind and other external forces on the ship in the water; the force of the anchor chain on the anchor in the flat underwater part can maintain the level, which is conducive to the reliable bottom holding of the anchor. At the same time, this part of the anchor chain is blocked by the soil, which can also provide part of the anchoring force.