The Admiralty anchor is a stock anchor, composed of anchor shackle, anchor stem, anchor bolt, anchor pin, anchor arm and anchor jaw. After pulling out the bolt pin, the bolt can be pulled out to make it close to the anchor dry for collection. The function of the anchor is that when the anchor is undercover and one end of the anchor is on the ground, the anchor chain pulls the anchor and forces the anchor to turn over, the anchor is lying flat, the anchor arm is vertical, and the anchor claw is on the ground. As the anchor is continued to be pulled, the bolt keeps the arm vertical, forcing the claw into the earth to produce a gripping force.