Skip to content
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.
  • Chandlery
Sign In Join now—it’s Free
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.
  • Chandlery
Sign In Join now—it’s Free

Glossary

AJAX progress indicator
ALL0-9ABCDEFGHIJKLMNOPQRSTUVWXYZ
Results: 48
  • Term
    Definition
  • General Nautical Terminology, Parts of a Boat Abeam

    The position or direction at right angles to the centreline or keel of a vessel, typically on either side of the boat.

    Abeam describes...

    More Details
  • General Nautical Terminology, Parts of a Boat Astern

    The area or direction behind a vessel, towards the stern.

    Astern is a nautical term used to describe both a direction and a movement in...

    More Details
  • General Nautical Terminology, Parts of a Boat Beam


    The widest part of a vessel, measured at its broadest point across the hull.

    The term beam is a fundamental concept in nautical terminology,...

    More Details
  • General Nautical Terminology, Parts of a Boat Bow

    The forward part of a vessel, designed to cut through the water and reduce resistance.

    The bow of a vessel is its frontmost section, typically...

    More Details
  • General Nautical Terminology, Parts of a Boat Cabin

    An enclosed space on a boat or ship that provides shelter and accommodation for passengers or crew.

    A cabin on a boat or ship is a designated...

    More Details
  • General Nautical Terminology, Parts of a Boat Catamaran

    A type of multihulled vessel featuring two parallel hulls of equal size, connected by a deck or framework, offering stability, speed, and...

    More Details
  • General Nautical Terminology, Parts of a Boat Clew

    The lower aft corner of a sail, where the foot and leech meet, and is often equipped with a grommet or cringle for attaching control lines such...

    More Details
  • General Nautical Terminology, Parts of a Boat Companionway

    A set of steps or a ladder leading from one deck of a vessel to another, often enclosed by a hatch or housing. 

    A companionway is an essential...

    More Details
  • General Nautical Terminology, Parts of a Boat CQR

    A type of plough anchor renowned for its hinged shank and ability to reset itself effectively in various seabed conditions.

    The CQR...

    More Details
  • General Nautical Terminology, Parts of a Boat CQR Anchor (CQR)

    A type of plough anchor renowned for its hinged shank and ability to reset itself effectively in various seabed conditions.

    The CQR...

    More Details
  • General Nautical Terminology, Parts of a Boat Crown

    The part of an anchor where the shank meets the arms, forming the base from which the flukes extend.

    The crown controls how the anchor sits...

    More Details
  • General Nautical Terminology, Parts of a Boat Displacement

    The weight of the water a vessel displaces when it is floating, which is equal to the vessel's own weight.

    Displacement is a fundamental...

    More Details
  • General Nautical Terminology, Parts of a Boat Displacement Vessel

    A type of watercraft designed to move through the water by displacing an amount of water equal to its own weight, relying on buoyancy and...

    More Details
  • General Nautical Terminology, Parts of a Boat Downhaul

    A downhaul is a line or tackle to apply downward tension on a sail or spar to control its shape and optimise performance.

    The downhaul is an...

    More Details
  • General Nautical Terminology, Parts of a Boat Fluke

    The flat, triangular blade or arm of an anchor designed to dig into the seabed and provide holding power.

    The term "fluke" in a marine context...

    More Details
  • General Nautical Terminology, Parts of a Boat Foredeck

    The forward part of a vessel's deck, located towards the bow and often used for anchoring, mooring, or storage.

    The foredeck is a critical...

    More Details
  • General Nautical Terminology, Parts of a Boat Forward

    The section of a vessel that is located towards the bow, or front, of the ship.

    Forward refers to the area or direction towards the bow...

    More Details
  • General Nautical Terminology, Parts of a Boat Galley

    The kitchen or cooking area on a ship or boat, typically compact and designed for efficient use of space.

    Unlike a kitchen in a house, the...

    More Details
  • General Nautical Terminology, Parts of a Boat Gelcoat

    A specialised resin-based coating applied to the surface of fibreglass boats to provide a smooth, durable, and protective outer layer.

    Gelcoat...

    More Details
  • General Nautical Terminology, Parts of a Boat Helm

    To steer or direct a vessel using its helm or steering apparatus. The apparatus or position used to steer and control a vessel, typically...

    More Details
  • 1
  • 2
  • 3
  • >>

Quick Links

  • Join NowJoin now and get access to great content and free courses.
  • Nautical Know HowEverything nautical, explained simply.
  • Marine DirectoryFind Courses and Course Providers.
  • Community Views & NewsNews, views, tips’n’tricks.
  • Contact UsGet in touch, we love talking to people on our wavelength.

RYA Recognised Training Centre No: 920567214

Crafted with

Made with love

by My Sailing Course

Follow us:

  • Facebook
  • Instagram
  • X
  • TikTok
  • YouTube

Running on

Powered by

© 2026 – My Sailing Course (Part of The Sailing Business Ltd) | Terms & Conditions | Privacy Policy | Partnership Programme

Join for Free!

Join for free and get access to lots of resources and downloads, including our Sailing Essentials course.

Forgot Password?
Lost your password? Enter your email address and you will receive a unique code enabling you to create a new password.
Change
Please choose a new password for your entry in our ship's log.
  • Share on Facebook
  • Share on WhatsApp
  • Share on LinkedIn
  • Share on X
  • Email this Page

What are you looking for?

  • Sign In
  • Register
Forgot Password?
Lost your password? Enter your email address and you will receive a unique code enabling you to create a new password.
Change
Please choose a new password for your entry in our ship's log.
body::-webkit-scrollbar { width: 7px; } body::-webkit-scrollbar-track { border-radius: 10px; background: #f0f0f0; } body::-webkit-scrollbar-thumb { border-radius: 50px; background: #dfdbdb }