Which knot requires the incorporation of a safety knot?

The bowline knot is designed to create a fixed loop at the end of a rope and is known for its strength and stability under load. However, one of its characteristics is that it can be susceptible to slipping when not under load or when subjected to movement or rotation. To mitigate this risk, a safety knot is often added to secure the bowline in place, providing an extra layer of security to ensure that the loop remains intact and does not come undone.

While the other knots have important applications in rescue scenarios, they do not require a safety knot in the same way as the bowline does. For example, the clove hitch is generally used for securing a rope to a cylindrical object and is stable in many contexts but can be unreliable if the load shifts. The figure 8 bight and alpine butterfly knots are known for their security and do not typically require additional safety knots when tied correctly. Thus, the bowline stands out as the knot that necessitates additional security through a safety knot in practical use.