The anchor chain refers to a special chain that connects the anchor and the hull and transmits the anchor holding force. Often composed of chain outboard shot, mid chain, and chain end shot. According to the structure of the link, it can be divided into two types: stud link anchor chain and studless anchor chain. The strength of the former is greater than that of the latter. According to the manufacturing method, the chain can be divided into cast steel chain and welded chain.