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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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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 Archive

Advanced Pilotage

The RYA Advanced Pilotage course focuses on navigating in challenging conditions, such as night cruising or confined waterways. Participants practice advanced navigation techniques, including the use of electronic aids, radar, and tidal calculations. The course emphasizes safety and decision-making, ensuring participants can handle complex pilotage scenarios with confidence.


Advanced Plus Windsurfing

The RYA Advanced Plus Windsurfing course is aimed at experienced windsurfers seeking to push their skills to the limit. The course covers advanced freestyle moves, high-speed sailing, and wave techniques. Participants practice optimizing equipment for extreme conditions and mastering dynamic maneuvers. By the end, windsurfers will have the confidence to tackle demanding environments and explore...


Advanced Windsurfing

The RYA Advanced Windsurfing course focuses on refining techniques for high-performance windsurfing. Participants learn advanced maneuvers such as carve gybing, waterstarting, and managing stronger winds. The course emphasizes optimizing board and sail setup for maximum speed and control. By the end, windsurfers will feel confident tackling challenging conditions and enhancing their performance on the water.


Afloat

The state of being buoyant and on the water's surface, not submerged or sinking.  Afloat is a term commonly used in the maritime world to describe vessels, objects, or even people supported by water and remaining on its surface. For a ship or boat, being afloat means it is appropriately buoyant, not taking on water,...


Aft

The rear or stern section of a vessel, towards the back of the boat or ship. Aft is a directional term used to describe the position or movement towards a vessel's stern (the back). It is one of the fundamental terms used to orient oneself on a boat or ship, alongside others like forward (towards...


After Deck

The portion of a vessel's deck located towards the stern, or rear, of the ship. The after deck, sometimes referred to as the aft deck, is a crucial area on a vessel, particularly in larger ships and yachts. The section of the deck is located towards the stern, which is the rear part of the...


Aground

The situation when a vessel is stuck on the seabed or shore, unable to move freely in the water. When a vessel is aground, the hull has come into contact with the seabed, sandbank, or shore, and the vessel no longer floats freely. This can happen intentionally, such as when a ship is beached for...


Ahead

The direction in front of a vessel, typically along its forward course or heading. In maritime terminology, ahead is commonly used to describe the direction directly in front of a vessel, relative to its bow. When a ship is said to be moving ahead, it means it is progressing forward in the direction of its...


Ahoy!

A nautical greeting or hail used to attract attention, signal presence, or establish communication between vessels or individuals at sea. Ahoy! is a traditional maritime term used for centuries as a greeting or call in the nautical world. Its origins can be traced back to the Middle Ages, deriving from the Middle English cry "hoy!"...


Air Cushioned Vessel

A type of watercraft that uses a cushion of pressurised air beneath its hull to reduce friction and enable movement over water, land, or other surfaces. An air-cushioned vessel, commonly called a hovercraft, is a unique type of marine craft that creates a cushion of air beneath its structure. This cushion is generated by powerful...


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