Which knot is often referred to as the "life-saving knot"?

The Figure-eight knot is often referred to as the "life-saving knot" because of its reliability and security in rescue operations. It creates a strong, fixed loop at the end of a rope and is recognized for its ability to maintain its strength under load. This knot is commonly used in climbing, rappelling, and rescue scenarios, making it essential for safety in high-risk environments.

The figure-eight knot is easy to untie after loading and can also be tied in a way that allows for easy adjustments, which is vital during rescue operations where swift actions are necessary. Its effectiveness and widespread use in critical situations contribute to its reputation as a "life-saving knot."

Other knots may have their specific applications, but none offer the same combination of security, ease of inspection, and versatility in situations where lives may depend on the integrity of the knot.