I still can't upload or post a link to show what else those knots are useful for. Posting evidence is dangerous to your posting privileges.
htt://s1277.photobucket.com/user/OnnoVocks/media/P1080231.jpg.html?filters=Array&sort=1&o=0
So I guess you'll just have to add ps after htt.

Maybe this knot tying exercise is related to travel something light footed rising out of the swamp looking for something Concrete poured over yellow Plywood. I personally prefer Cleats to attach my Bow Line to the Concrete firmament in case I no longer want to be where I am. This often means I just want to get off the boat and return to being a House mouse. The constant movement aboard is taxing unless reclined.