The Square Knot, also known as the Reef Knot, is a simple binding knot used to secure ropes around objects or bundles. It is commonly employed in camping, boating, and decorative textiles. Historically, sailors used it for reefing sails. Its flat structure makes it suitable for tying bandages. However, it should not be used to join two ropes, especially under load or with ropes of different sizes, as it can become unstable.

Also Known As

• Reef Knot
• Hercules Knot

Advantages

Easy to tie and untie, flat structure ideal for securing objects and bandages.

Disadvantages

Unstable for joining ropes, especially under unequal loads or different sizes; not for critical use.