One time while on a barge being pushed by a tug, the captain decided to let us off at a public boat dock at the end of the day (as in like 01:00). He gently pushed the barge up against the boat ramp next to the dock. To be legally "docked" so he could take a break, he had the mate "tie up" to the dock. So, a large line inches in diameter was dropped from the barge down 6 or so feet to the dock and looped around a cleat like in the above video. There! Legally tied to the dock!

Wish I'd thought to take a picture, it just looked so silly.

Oh, the harbormaster asked the captain if he was worried about getting the barge stuck. When the captain stopped laughing he said this tug had been used to drag a large Navy ship off a sand bar not long ago, a little barge wasn't going to be any problem.