Its no surprise how many people who work on boats use this not on a daily basis, because it is one of the most versatile knots. Great for making a loop or an eye at the end of your line. It can be used to tie through or around an object like a piling or a cleat. It will be a knot you will always want to know, even if you never need to use it.
THE BOWLINE KNOT
(Watch the video below for a full tutorial on this official yachting knot).