There are few knots that you use more in boating than the Bowline.
It’s a simple knot for making a loop in a line. It holds tight under pressure and it’s easy to undo.
This video from the Brownies Coastwatch Vault shows an easy way to remember how to tie it.
You my be wondering why we would bother to show something as basic as how to tie a bowline. A look around a marina at mooring lines will answer that question.