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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!
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        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.
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Glossary Archive

Dinghy Level 3 - Better Sailing

The RYA Dinghy Level 3 course focuses on refining sailing techniques and building confidence in more challenging conditions. Participants enhance their understanding of sail trim, boat balance, and navigation. The course introduces more advanced maneuvers and emphasizes decision-making and problem-solving on the water. By the end, sailors will have the skills to handle their boats...


Dinghy Performance Sailing

The RYA Dinghy Performance Sailing course is designed for experienced sailors aiming to enhance their racing and technical skills. This advanced course focuses on maximizing speed, efficiency, and control in performance dinghies. Participants learn to fine-tune rigging, optimize sail trim, and manage boat balance for peak performance in various wind conditions. Practical sessions cover advanced...


Dinghy Regional Racing

The RYA Dinghy Regional Racing course is designed for sailors transitioning to competitive racing at a regional level. Participants learn advanced race tactics, starting techniques, and mark rounding strategies. The course focuses on refining boat handling and improving speed through sail trimming and balance adjustments. Practical sessions simulate race scenarios, helping sailors build confidence and...


Dinghy Sailing with Spinnakers

The RYA Dinghy Sailing with Spinnakers course introduces sailors to the exciting challenge of spinnaker handling. Participants learn how to rig, hoist, trim, and gybe spinnakers effectively while managing boat balance and speed. The course also covers safety procedures, troubleshooting, and teamwork essential for using spinnakers in varying wind conditions. By the end, participants will...


Dinghy Seamanship Skills

The RYA Dinghy Seamanship Skills course focuses on developing practical abilities to handle dinghies in a variety of conditions. Participants learn essential techniques like reefing, recovering from capsizes, and maneuvering in confined spaces. The course also emphasizes safety procedures and problem-solving, preparing sailors for challenges such as strong winds, tidal streams, or equipment failures. Practical...


Dinghy Start Racing

The RYA Dinghy Start Racing course is perfect for sailors looking to begin their journey into competitive sailing. This course covers racing basics, including starting procedures, racing rules, and strategic boat positioning. Practical sessions focus on mark rounding, optimizing boat speed, and handling the pressure of competition. By practicing simulated races, participants build confidence in...


Dip the Ensign

To lower the ensign briefly as a salute.  It is not re-hoisted until the vessel saluted has dipped and re-hoisted hers in acknowledgement


Directional Light

A light illuminating a sector or very narrow angle and intended to mark a direction to be followed.


Direction of Buoyage

The direction in which lateral marks (port and starboard buoys) should be passed when entering a harbour or following a main channel, based on the IALA buoyage system. The Direction of Buoyage on a nautical chart indicates the general direction in which lateral marks (such as port and starboard buoys) should be passed when following...


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 concept in naval architecture and marine operations, as it directly relates to a vessel's buoyancy and stability. When a boat or ship is placed in water, it pushes aside or "displaces"...


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