The most forward stay on the boat is also called the headstay . A sail placed forward of the mast , such as a jib . A sail attached to the forestay , as opposed to a jib , which is attached to the headstay . A mast above the foremast . When a line ends up somewhere it does not belong and becomes jammed.
Lines can foul on blocks , winches and other objects on a boat.
A keel that runs the length of the boat. Full keels have a shallower draft than fin keels . Sails are sometimes partially furled to reduce the amount of sail area in use without completely lowering the sail. This is usually known as reefing .