Which knot is known to be insecure by itself and is typically used alongside other knots?

The Half Hitch is a knot that is often used in conjunction with other knots because it is not secure on its own. When tied, a Half Hitch can easily slip or come undone, especially when it is not under a load or tension. For this reason, it is commonly used to supplement other knots, providing additional security.

The Half Hitch is typically utilized for securing a line temporarily or adjusting a position, but when greater security is needed, it would be advisable to combine it with a more stable knot. This can enhance the integrity and reliability of the setup, making it a practical choice in various scenarios.

In contrast, knots like the Bowline, Clove Hitch, and Figure Eight are more secure on their own, each serving distinct purposes where additional security is required without the need for further tying. Hence, the Half Hitch's role as a supplemental knot aligns with its characteristics as an insecure knot when not combined with others.