Chain Cable is a steel chain connecting the hull and anchor. The main functions of anchor chain are: connecting anchor and ship, transferring anchorage force to hull; when anchoring, due to the weight of anchor chain thrown out, it can buffer the external forces such as wind and current in water; the anchor chain of horizontal underwater part can maintain the level of anchorage force, which is beneficial to the reliable bottom grasping of anchor. At the same time, this part of the anchor chain can also provide a part of the anchoring force due to the blocking effect of soil.