Many people use a shackle or some other attachment for a halyard, but there are many reasons why it might be better to attach the halyard with a knot. A knot is simpler, and simple is good, especially on dinghies and smaller keelboats. It’s cheaper than a shackle, weighs less, and the chafed part where the halyard exits the mast can be cut off, extending the halyard’s life for another season. Not just any knot will work, however. Here’s how I do it.