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Nautical Know How
  • Our Courses

      All our courses are engaging, interactive and fun! Whether formal training or simply looking to brush up, we take online learning to the next level.

    • Sailing EssentialsFreeA free course great for anyone who spends time on the water.
    • Essential Navigation & SeamanshipA great introduction to navigation and basic seamanship.
    • Day Skipper TheoryMany of the best skippers started their journey here.
    • Coastal Skipper / Yachtmaster® TheoryComing SoonEssential preparation for the Yachtmaster® practical exam.
    • SRC (VHF) Marine Radio CourseAn essential course for anyone intending to use a marine radio.
  • Directory

      Are you looking for something nautical related? Our directory is an extensive list of courses and places associated with the marine industry. Hop over and search now.

    • Places
      Find anywhere nauctical, including marinas u0026 training centres. If it exists, we’ve got it listed!
    • Courses
      We help you navigate through the complex world of training and help find what’s best for you.
  • Know-How

      We believe every day’s a school day on a boat! That’s why we built Nautical Know-How, dedicated to answering your questions. Even better, if it can’t answer your question immediately, you can request it, and we’ll add it to our knowledge base.

    • Nautical Terms & Terminology
      Understanding the language of the marine world is like trying to learn a pirate’s secret code while juggling fish. Let us explain why a sheet isn’t for your bed, why “heave ho” doesn’t mean throw up (most of the time), and why “dead reckoning” is surprisingly less ominous than it sounds.
    • 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 u0026 RYA Coastal Skipper / Yachtmaster® Offshore theory courses.
    • Buoyage Flashcards
      Flashcards 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.
    • Interactive Rule Book (COLREGs / IRPCS)
      Whether you’re a novice sailor or a seasoned skipper, we can help you navigate the IRPCS confidently and clearly. Our easy-to-use, easy-to-understand, plain English rule book with helpful interpretations of what each rule means.
    • The Salty Sea Blog
      From salty old sea dogs to fresh-faced deckhands, this blog is for anyone who finds peace, adventure, and a bit of mischief on the water. So hoist the main, set your course, and let’s sail into the stories, lessons, and musings that make life on the sea so irresistible.
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Published:25th October 202411th February 2025 Last Updated:11th February 2025
General Nautical Terminology

Yard

A horizontal spar on a sailing vessel attached to the mast and used to support and spread a square sail.

A yard is an essential component of the rigging on traditional sailing ships, particularly those with square-rigged sails. It is a long, horizontal spar secured to the mast at its midpoint. The yard’s primary function is to support the sail and allow it to be spread out to catch the wind. Depending on the size of the vessel and the era in which it was constructed, yards are typically made of wood or metal. 

On square-rigged ships, the sails are attached to the yards by a series of lines and fittings, and the yard itself can be rotated around the mast to adjust the angle of the sail relative to the wind. This rotation is controlled by braces, which are lines that run from the ends of the yard to various points on the ship. By adjusting the braces, sailors can “brace” the yard at different angles, allowing the sail to catch the wind more effectively and enabling the ship to sail in various directions.

Yards are named according to their position on the mast. For example, on a ship with multiple masts, the yards on the foremast (the mast closest to the bow) are called the foreyards, while those on the mainmast (the tallest mast) are called the main yards. The lowest yard on a mast is typically the largest, referred to as the course yard, as it supports the course sail, which is the largest square sail on that mast. Above the course yard are the topsail yard, the topgallant yard, and sometimes the royal yard, each supporting progressively smaller sails.

In addition to spreading the sails, yards play a role in the overall stability and balance of the ship’s rigging. The weight of the yards and the sails they support must be carefully distributed to ensure the ship remains stable, especially in heavy winds or rough seas. On some ships, the yards are equipped with footropes, which allow sailors to stand on them while working with the sails. This is necessary because the sails on a square-rigged ship are often very large and require manual handling to furl (roll-up) or unfurl (spread out).

Yards are mostly limited to traditional or historic sailing vessels. Most contemporary sailboats use fore-and-aft rigging, which does not require yards. However, yards remain an iconic feature of classic tall ships and are important to maritime history.

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