The primary function of an anchor is to securely moor a ship at a predetermined location and assist in specific operations. Specifically, anchors can be categorized into the following types：

一，Stock  anchor:

Naval anchor: It is a typical shank anchor with the longest history of use, also known as a common anchor. This type of anchor has strong holding power and can firmly grip various types of soil, but it is inconvenient to retrieve and deploy. It is no longer used as the main anchor on modern large ships, and is only used as the main anchor on sailing ships and small inland river boats.

二，Stockless anchor:

Hall anchor: The Hall anchor is a first-generation modern standard rodless claw anchor. This type of anchor is simple to manufacture, easy to store, has a strong grip, and good holding ability. It is the preferred choice for main anchors of large and medium-sized ships, and is favored in China.

Spek Anchor: An improved version of the Hall Anchor, its structural feature is the installation of a crown plate and reinforcing ribs at the anchor crown. Therefore, the claws of this anchor are easily turned towards the ground, providing better stability, and it does not scratch the hull plating when stored. AC-14 Anchor: Known as the second generation of rodless anchors. Its anchor crown is wide, the claws are relatively thick and long, and have longitudinal ridges. This anchor is heavy, with strong grip and good stability. It is commonly used as the main anchor for large container ships, car carriers, and very large crude oil tankers, and is a commonly used anchor in Europe, America, and Japan.

三，Special anchor

Special anchors are designed specifically for special purposes and are commonly used for permanent mooring of buoys, buoys, lighters, floating docks, and floating piers. These include single-claw anchors, screw anchors, and mushroom anchors.