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  • Why do we have tides?Have you ever wondered what causes the tides? Check out this video, which introduces the forces that create the tides we experience on Earth.
  • What causes our weather?A video introducing the drivers behind our weather, part of our RYA Day Skipper & RYA Coastal Skipper / Yachtmaster® Offshore theory courses.
  • Buoyage FlashcardsFlashcards designed to help remember the buoys in the IALA system. If you want to learn them in detail, our module ‘Getting in and out of harbour‘, covers the IALA system and different buoys used.
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Published:14th November 202430th August 2026 Last Updated:30th August 2026
General Nautical Terminology | Nautical Topics | Mooring & Berthing | Parts of a Boat | Safety

Knot

A structure formed by interlacing or looping rope, cord or similar flexible material so it holds under an intended load.

Knots may form a fixed or adjustable loop, join two lines, attach a line to an object, create a stopper or shorten a rope. In strict terminology, bends join lines and hitches attach a line to an object, although everyday usage often calls all of them knots.

Suitability depends on rope material, construction, load direction, security, ease of release and the strength reduction caused by bending. A knot should be correctly dressed, set and inspected rather than selected by name alone.

  1. Bowline: Known as the “king of knots,” the bowline creates a fixed loop at the rope’s end. It is commonly used to secure a line to a post or ring and is prized for its ability to hold firm under tension while remaining easy to untie.
  2. Clove Hitch: This is a simple knot temporarily securing a line to a post or pole. It is quick to tie and untie, making it useful for tasks where the line may need to be adjusted frequently.
  3. Sheet Bend: This knot joins two ropes of different diameters. It is particularly useful when tying together lines that may be of different thicknesses, such as when attaching a smaller line to a larger mooring line.
  4. Figure Eight Knot: This knot is used to prevent the end of a rope from fraying or slipping through a block or pulley. It creates a large, secure stopper knot that is easy to untie, even after loading.
  5. Reef Knot (Square Knot): This knot is used to tie two ends of a rope together in a way that is secure but easy to untie. It is often used for tying down sails or securing bundles.
  6. Half Hitch: This is a simple knot used to secure the end of a rope to an object. It is often used with other knots, such as the clove hitch, to provide additional security.
  1. Binding Knots: These knots secure objects together, such as tying down sails or securing cargo.
  2. Hitches: These knots attach a rope to an object, such as a post, cleat, or ring.
  3. Bends: These knots are used to join two ropes together.
  4. Loops: These knots create a fixed loop in the rope, which can be used to attach the rope to an object or create a handhold.
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