According to the structure of the chain, the marine anchor chain can be divided into two types: Stud Link Anchor Chain and Studless Anchor Chain. The stud link anchor chain provided with a crosspiece. When the size and material are the same, the strength of the chain is larger than that of the studless chain, the deformation is small, and it is not easy to twist when stacked, which is a modern medium and large type. Ships are widely used. The chain of the studless chain has no crosspiece and is only used for small vessels. The specification stipulates that when the diameter of the marine anchor chain equipped as required does not exceed 17 mm, it may be replaced by studless anchor chain with the same test load or a wire rope or fiber rope with the same breaking load.