How long should an anchor line be relative to the water's depth?

The correct answer indicates that an anchor line should be seven to ten times the maximum depth of the water. This rule of thumb is based on the need for adequate scope, which is the ratio of the length of the anchor line to the depth of the water. A line that is too short may not set the anchor effectively, risking the boat drifting.

Having a longer anchor line ensures that the anchor can grab onto the seabed more securely, providing better holding power. When the anchor line is at least seven times the depth, it allows for effective drag, helping to reduce movement from waves and currents.

The higher ratio, extending up to ten times the depth, provides even more security, especially in variable water conditions or when anchoring in rough waters, where increased length helps to counteract stress on the anchor and the boat. Thus, adhering to this guideline is essential for a safe and stable anchorage.