A sheepshank knot can shorten a rope while you are a kayaking. It is not a strong know but can come in handy if you need to take up slack within your rope.
Step 1:Â Create a large Z within the middle of your rope.
Step 2:Â At the end of each side of the Z create a small loop facing inwards.
Step 3:Â Take the lower portion of the Z and bring it through the left loop.
Step 4:Â Take the upper portion of the Z and bring it through the right loop.