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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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Published:25th October 202419th March 2025 Last Updated:19th March 2025
General Nautical Terminology | Safety

Liferaft

An inflatable or rigid floating device designed to provide emergency refuge and safety for individuals forced to abandon a vessel at sea.

A liferaft is an essential piece of safety equipment carried aboard most seagoing vessels, including commercial ships, yachts, and fishing boats. Its primary purpose is to serve as a temporary shelter and flotation device in the event of an emergency, such as a ship sinking or catching fire. Liferafts are typically constructed from durable, waterproof materials that can withstand harsh marine conditions, and they are designed to be highly buoyant to support multiple occupants. Inflatable liferafts are the most common type, stored in compact canisters or valises and automatically or manually inflated when deployed. They are equipped with survival gear, such as paddles, a sea anchor, signalling devices, first aid supplies, and rations of food and water, to sustain occupants until rescue arrives.

Liferafts are subject to strict international regulations, such as those outlined in the International Convention for the Safety of Life at Sea (SOLAS). These regulations dictate their construction, maintenance, and the minimum equipment they must carry. Regular servicing and inspections are mandatory to ensure the liferaft remains functional and ready for use. Liferafts are often deployed using hydrostatic release units, which automatically release the raft if the vessel sinks below a certain depth. Their bright colours and reflective strips enhance visibility, making them easier for rescuers to locate. While a liferaft is a vital safety measure, it is considered a last resort, and abandoning a vessel should only occur when staying aboard is no longer safe.

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