A good rule of thumb is that the anchor line should be at least how many times the depth of the water?

The anchor line should be at least seven to ten times the depth of the water in order to ensure a secure hold. This recommendation accounts for several factors, such as the angle of the anchor line, water movement, and changes in depth caused by tides or waves. A longer anchor line increases the surface area of the anchor in contact with the seabed, enhancing its ability to hold the boat in place.

In conditions where currents or winds are strong, a longer line helps to provide better friction and gripping of the anchor, reducing the chances of it dragging or releasing from the seabed. This guidance helps boaters maintain stability and safety while at anchor, particularly in unpredictable weather or water conditions.