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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 202419th February 2025 Last Updated:19th February 2025
General Nautical Terminology

Sealegs

The ability of a person to maintain balance and move steadily on a vessel in motion, particularly in rough seas.

Sealegs is a term deeply rooted in maritime culture, describing the adaptation process by which individuals become accustomed to the motion of a boat or ship at sea. When someone has “found their sealegs,” it means they have developed the physical and mental equilibrium required to navigate the often unpredictable swaying, pitching, and rolling of a vessel. This adaptation is not innate but rather learned through exposure to the conditions of the sea. For newcomers to sailing or boating, the lack of sealegs often manifests as difficulty walking, standing, or performing tasks on board, and it may be accompanied by seasickness. Over time, however, the body adjusts to the constant motion, and the individual becomes more stable and confident in their movements.

The concept of sealegs is not limited to physical balance alone; it also encompasses a psychological adjustment to the rhythm of life at sea. This includes becoming attuned to the sounds, vibrations, and movements of the vessel, which can help mariners anticipate changes in the sea state or vessel behaviour. For seasoned sailors, having sealegs is second nature, allowing them to perform complex tasks even in challenging conditions. The term is often used metaphorically as well, signifying adaptability and resilience in unfamiliar or shifting environments.

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