A figure eight knot is a specific type of stopper knot that is characterized by its shape, which resembles the number eight. This knot is usually made at the end of a rope, line, or string to inhibit the end from slipping through a small hole or ring, such as a grommet or a block. It functions as a safeguard mechanism, primarily used to maintain the line's position or to prevent it from fraying. Its firm, steady structure ensures a secure hold while also being easy to inspect, making it a popular knot choice in activities such as sailing, rock climbing, and camping. Despite its strength, the figure eight knot is straightforward to untie, reducing the risk of potential damage to the line during removal.

1. Sailors often use a figure eight knot at the end of a line to ensure it doesn't slip through a block when hoisting or lowering sails. 2. Rock climbers regularly tie a figure eight knot at the end of their rope as a safety measure to ensure the rope doesn't accidentally pass through their rappelling or belaying device. 3. Fishermen can employ a figure eight knot in their fishing lines to prevent the end of the line from slipping through a weight or a loop. 4. In camping, a figure eight knot might be used at the end of a tent rope to secure it and prevent it from pulling through a tent peg or a guy line loop. 5. Mountain rescuers can use a figure eight knot at the end of a rescue rope when anchored to a tree or other solid object. The knot prevents the rope from slipping or being pulled out.

The figure eight knot, also known as the Flemish knot, is not only used for practical purposes such as preventing a line from passing through a block or grommet, but it also plays a key role in various adventurous activities such as rock climbing and sailing. In rock climbing, a figure eight knot is used to securely connect the rope to the climber's harness, ensuring their safety. It's favored for this purpose due to its strong holding power and its ability to be untied easily, even after bearing weight. Despite its simplicity, the figure eight knot is considered one of the most secure knots you can tie. Its pattern is symmetrical, which distributes the load evenly and reduces the risk of failure. So, the figure eight knot, while being a simple stopper knot, is responsible for many climbers and sailors trusting their lives to during their adventures!