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

ALL0-9ABCDEFGHIJKLMNOPQRSTUVWXYZ
Results: 29
  • 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 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 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 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
  • General Nautical Terminology, Parts of a Boat On the Port Bow

    Refers to something located in the forward left quadrant of a vessel, between directly ahead and 90 degrees to the port (left) side.

    "On the...

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

    Refers to a position or object located forward of the vessel and to the right-hand side when facing the bow (front) of the ship.

    "On the...

    More Details
  • General Nautical Terminology, Parts of a Boat On the Starboard Quarter

    The area of a vessel located towards the rear (aft) on the right-hand side when facing forward.

    The phrase "on the starboard quarter" is a...

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

    A line or tackle system used to adjust the tension and position of the sail's clew along the boom, affecting the sail's shape and...

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

    The left-hand side of a vessel when facing forward towards the bow.

    The term "port" is used in maritime navigation to refer to the left side...

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

    The side of a vessel that is perpendicular to its centreline and located on the left-hand side when facing forward towards the bow.

    The term...

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

    The forward left-hand side of a vessel when facing the bow (front).

    The term "port bow" is a specific designation used in nautical contexts to...

    More Details
  • General Nautical Terminology, Parts of a Boat Port Quarter

    The aft-left section of a vessel when facing forward, located between the port beam and the stern.

    The term "port quarter" is a specific...

    More Details
  • General Nautical Terminology, Parts of a Boat Reefing Lines

    Ropes or cords used to reduce the sail area by securing a portion of the sail to the boom or mast, thereby making the vessel more manageable in...

    More Details
  • General Nautical Terminology, Parts of a Boat Sole boards

    The flat, horizontal planks or panels that form the flooring of a boat's interior, typically installed over the bilge area to provide a stable...

    More Details
  • General Nautical Terminology, Parts of a Boat Spinnaker Pole

    A spar used on sailing vessels to control one clew of a spinnaker sail when sailing downwind.

    A spinnaker pole is a key piece of equipment...

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

    The right-hand side of a vessel when facing forward towards the bow.

    Starboard is a fundamental directional reference used to describe the...

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

    The side of a vessel that is directly to the right, at a 90-degree angle from the centreline, when facing forward.

    The term starboard beam is...

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

    The forward section of a vessel's right-hand side when facing the bow (front) of the ship.

    The term "starboard bow" is a specific nautical...

    More Details
  • General Nautical Terminology, Parts of a Boat Starboard Quarter

    The rear right-hand section of a vessel when facing forward towards the bow.

    The term "starboard quarter" is a specific navigational and...

    More Details
  • General Nautical Terminology, Parts of a Boat Symetric Spinnaker

    A large, lightweight, balloon-shaped sail used when sailing downwind, designed with identical halves to allow it to be flown on either side of...

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

    A sliding fitting or track on a sailing vessel, used to adjust the position of a sail's sheet or other control lines for optimal sail...

    More Details

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

© 2025 – 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 }