Second Step to Tie a Prusik Knot
The second step to tie a Prusik knot is to take the loop of cord behind the climbing rope and bring half of the loop through the other half of the loop and form a girth hitch. A girth hitch is a basic knot for attaching a sling or cord to any object, including a tree, piece of climbing gear, or, in this case, the climbing rope. Note that the knot in the small cord is on the outside of the hitch.
The second step is the make a girth hitch with the thin cord on the climbing rope.
