Why Ship Anchors Don't Actually Hold Ships in Place

When a ship drops anchor, most people assume the anchor drives into the seabed and locks the vessel in place — but a modern ship's anchor simply lies on the bottom, and the anchor itself contributes only a fraction of the total holding force. It is the weight and catenary geometry of hundreds of tons of chain lying on the seabed that absorbs wind and current forces before they ever reach the anchor. This video breaks down the full engineering logic behind ship anchoring — fluke geometry and setting mechanics, catenary force distribution, why chain length is calculated from water depth, seabed type limitations, windlass capacity, and the precise conditions under which even a properly set anchor will drag.