Be it to tense the down-haul or simply as a quick fix to attach a harness line to the boom, the clove hitch is the thirst of the three indispensable knots any windsurfer should know. They guys over at SurferToday show a slightly different way to tie this particular knot.
The bowline knot is the second essential knot on the list. It is the best knot to add a non-self-tightening noose to the end of a rope. It is used on the end of the downhaul line to hook the harness hook in to tense the downhaul.
There are three basic knots one should know as a windsurfer as they can come in handy at one time or another. There first is the square knot. The square knot is the most useful of the three I will talk about as it is what we use when we need to unite two rope ends. This can help us out of a pickle when the downhaul or the outhaul line tears on the water. Make sure you have control of this knot.