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      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.
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  • 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

SOLAS V

Chapter V of SOLAS (Safety of life at Sea) refers to the Safety of Navigation for all vessels at sea. SOLAS V for pleasure craft SOLAS V contains regulations for vessels under 150 GT (gross tonnage) used for pleasure. Specific regulations for pleasure craft (less than 150 gross tonnage) The following regulations are the elements...


Sole

Sea area of the Met Office Shipping Forecast. Covers Sole Bank in the eastern Bay of Biscay off the French coast. From the Sole Bank, famed for flatfish, Sole experiences west winds of Force 4–6 and moderate seas. Fishing fleets often schedule “Sole runs” immediately after storm windows to take advantage of calmer waters.


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 walking surface and access to the bilge. Sole boards, often referred to simply as "the sole," are an integral part of a boat's interior construction. They serve both functional and aesthetic...


SOS

The universally recognised distress signal used in maritime communication to indicate an emergency requiring immediate assistance. The German government introduced it as part of the international Morse code in 1905. On July 1, 1908, following the International Radiotelegraph Convention of 1906, SOS was adopted globally as the standard distress signal. SOS was proposed in 1906The...


Sound

A relatively narrow body of water that connects two larger bodies of water or separates a mainland from an island. A sound is a geographical feature commonly found in coastal areas, where it serves as a natural waterway connecting larger bodies of water, such as seas or oceans, with smaller bays, inlets, or rivers. It...


Sounding

The measurement of the depth of water, typically using a lead line or modern electronic equipment. Sounding is a traditional maritime practice used to determine the depth of water beneath a vessel. Historically, sailors would use a lead line, which is a long rope with a lead weight attached to the end. The weight would...


Southeast Iceland

Sea area of the Met Office Shipping Forecast. Located southeast of Iceland in the North Atlantic. Southeast Iceland covers waters renamed from “Iceland” in 1955, southeast of the island. Influenced by the Gulf Stream, it is milder than the open Atlantic but still sees frequent gales (Force 8–10) and large swells; a January 1995 storm...


South Utsire

Sea area of the Met Office Shipping Forecast. Situated in the North Sea, south of Utsira Island off the west coast of Norway. Also named for Utsira Island, South Utsire covers the southern part of the adjacent waters. While slightly more sheltered than North Utsire, it still sees frequent winter gales (Force 8) and rough...


Sou’wester

A waterproof oilskin hat with a broad brim


Space (Flag Semaphore)

This shape indicates a space, usually between words. The same shape is also used for Rest (Flag Semaphore) & Ready (Flag Semaphore).


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