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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 & SeamanshipRYA course for beginners. Learn charts, tides, pilotage, and core seamanship with simple practice tasks.
      • Day Skipper TheoryMost PopularRYA course for inshore skippers. Plan day passages using chartwork, tides, weather, and COLREGs.
      • Coastal Skipper / Yachtmaster® TheoryComing SoonRYA course for advanced navigation and passage planning. Work with secondary ports, tidal streams, and offshore weather.
      • SRC (VHF) Marine Radio CourseRYA Short Range Certificate radio course. Study online, then take the practical exam with an RYA assessor.
  • 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 nautical, including marinas & 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 & 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 202431st May 2025 Last Updated:31st May 2025
General Nautical Terminology

Eye Splice

A permanent loop formed at the end of a rope by interweaving its strands back into itself.

An eye splice is a fundamental ropework technique used in marine applications to create a strong, secure, and durable loop at the end of a rope. This loop, known as the “eye,” is formed without the need for additional hardware such as shackles or knots, making it a preferred choice for sailors and mariners. The process involves unlaying the strands of the rope’s end, weaving them back into the standing part of the rope in a specific pattern, and tightening them to ensure stability. The result is a loop that retains much of the rope’s original strength, unlike knots, which can weaken a rope significantly.

Eye splices are commonly used in various maritime contexts, including mooring lines, rigging, and securing sails. They are particularly valued for their reliability, as they do not slip or come undone under tension. Additionally, they maintain a smooth profile, which reduces wear and chafing when the rope is under load or in contact with other surfaces. Eye splices can be created in different types of rope, including three-strand, braided, and double-braided ropes, though the splicing technique varies depending on the rope’s construction.

Learning to create an eye splice is considered an essential skill for sailors and marine professionals, as it combines practicality with the traditional craftsmanship of ropework. While it requires some practice and patience, mastering the eye splice ensures a dependable and professional finish to any ropework task aboard a vessel.

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