Marine anchor is composited of anchor buckle, anchor bolt, anchor stock, anchor handle, anchor wrist and the symmetrical part on both sides is called anchor fluke which is the most important part of the anchor to grab into the dirt. After the ship is anchored, the anchor is sinking to the bottom of water under the traction of the anchor chain. The plane where the anchor wrist is located is perpendicular to the water bottom with the anchor rod. At this time, the anchor fluke will be in contact with the bottom of the water.
The length of the ship anchor chain is often longer than the depth of the water, so the anchor chain in the water bottom has a lying- flat state. When the ship is disturbed, the anchor chain will be pulled. The anchor in the bottom of the water under the action of the horizontal force. The role of the anchor itself acts on the contact point of the anchor fluke and the water bottom. The two-force synthesis makes an anchor move downward, which is anchoring the process. After that the anchor is pulled into the bottom of the water, which can provide the ability for boat berthing.
https://www.ysmarines.com/articles/detail/marine-anchor-used-for-boat-berthing-stably.html
