The carrick bend is a knot used to join two lines or ropes together securely. There are numerous synonyms for the term carrick bend, including the sailor's knot, the double coin knot, the Josephine knot, and the plafond knot. Each of these alternative names references a different aspect of the knot, such as its use by seafarers or its appearance. While the carrick bend is a simple knot, it is highly effective and can join two ropes of unequal diameter or material. It is an essential skill for anyone involved in knot tying or sailing.