What is the appropriate scope/depth ratio for anchoring?

The appropriate scope/depth ratio for anchoring is typically considered to be 1:6 or greater. This means that for every foot of water depth where the anchor is deployed, there should be at least six feet of anchor line or chain in use.

Using this ratio provides sufficient scope to allow the anchor to set properly on the sea floor, increases the holding power of the anchor, and minimizes the risk of dragging. A greater scope creates a wider angle from the seabed to the anchor line, which helps to distribute the load on the anchor more evenly and aids in preventing it from pulling out of the bottom.

In situations where conditions might be more challenging—such as strong current or high winds—adhering to this 1:6 ratio can provide additional security. It is a widely accepted guideline for recreational and commercial boating to ensure that vessels stay securely anchored under various conditions.