Which type of knot is used to tie two ropes of unequal size?

The becket bend, also known as the sheet bend, is designed specifically for tying together two ropes of unequal size. This knot accommodates differences in diameter effectively, allowing for a secure and stable connection. When tying a becket bend, one rope can be thicker while the other is thinner, and its design ensures that the connection remains tight under load without slipping.

This knot functions well because it provides a strong grip while also being easy to untie after use, even when under load. Its versatility makes it particularly useful in various scenarios such as climbing, sailing, and rescue operations where different rope sizes are commonly encountered.

In contrast, other knots like the bowline, clove hitch, or square knot are not ideally suited for joining ropes of significantly different sizes and may not provide the same level of security or stability. The bowline creates a fixed loop but does not secure two ropes together. The clove hitch is primarily used for securing a rope to a post or object and lacks the capability to effectively tie two ropes of differing diameters. The square knot is efficient for tying two ropes of similar sizes together and can jam when used with unequal sizes, making it less reliable in this context.