The Double Sheet Bend, like the Sheet Bend is used to fasten a small line to a larger one. A more secure knot, the Double Sheet Bend may be employed when a sheet bend may not have enough friction to hold well.
To Tie a Double Sheet Bend:
Pass the end of one rope #1 around the bight of rope #2.
Wrap rope #1 completely around the bight.
Direct rope #1 under its own standing part and through the front end of the bight.
Repeat step #2.
Repeat step #3.
Pull both ends of rope #1 together until the knot tightens.