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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.
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Sign In Join now—it’s Free

Glossary

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Results: 39
  • Term
    Definition
  • Organisation American Sailing Association (ASA)

    A US-based organisation that provides sailing education, certification, and accreditation for sailing schools and instructors. 

    The American...

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  • Organisation ASA

    A US-based organisation that provides sailing education, certification, and accreditation for sailing schools and instructors. 

    The American...

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  • Organisation Coastguard (HMCG)

    The organisation responsible for search and rescue operations in UK waters.

    His Majesty's Coastguard (HMCG) is a section of...

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  • Organisation Commissioners of Irish Lights

    Irish Lights is responsible for maintaining lighthouses, buoys, beacons, and other navigation aids along the entire coast of Ireland, including...

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  • Organisation General Lighthouse Authorities (GLA)

    A term that collectively refers to the three organisations responsible for maintaining maritime navigation aids—such as lighthouses, buoys, and...

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  • Organisation GLA

    A term that collectively refers to the three organisations responsible for maintaining maritime navigation aids—such as lighthouses, buoys, and...

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  • Organisation His Majesty's Nautical Almanac Office (HMNAO)

    The UK government agency responsible for producing astronomical and navigational data for maritime and military use. 

    His Majesty's Nautical...

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  • Organisation HMCG

    The organisation responsible for search and rescue operations in UK waters.

    His Majesty's Coastguard (HMCG) is a section of...

    More Details
  • Organisation HMNAO

    The UK government agency responsible for producing astronomical and navigational data for maritime and military use. 

    His Majesty's Nautical...

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  • Organisation IMO

    A specialised agency of the United Nations headquartered in London and responsible for regulating shipping, the IMO has 175 Member States.

    The...

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  • Organisation International Maritime Organisation (IMO)

    A specialised agency of the United Nations headquartered in London and responsible for regulating shipping, the IMO has 175 Member States.

    The...

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  • Organisation, Signals & Communication International Telecommunication Union (ITU)

    A specialised agency of the United Nations responsible for coordinating global telecommunication operations and services, including radio...

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  • Organisation ISAF

    World Sailing, formerly known as the International Sailing Federation (ISAF), is the governing body for the sport of sailing...

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  • Organisation, Signals & Communication ITU

    A specialised agency of the United Nations responsible for coordinating global telecommunication operations and services, including radio...

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  • Organisation MAIB

    A UK government agency responsible for investigating marine accidents and incidents to improve maritime safety. Part of the Department for...

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  • Organisation Marine Accident and Investigation Branch (MAIB)

    A UK government agency responsible for investigating marine accidents and incidents to improve maritime safety. Part of the Department for...

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  • Organisation Maritime and Coastguard Agency (MCA)

    The Maritime and Coastguard Agency (MCA) is a UK government agency responsible for implementing maritime safety and environmental policies. It...

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  • Organisation MCA

    The Maritime and Coastguard Agency (MCA) is a UK government agency responsible for implementing maritime safety and environmental policies. It...

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  • General Nautical Terminology, Organisation, Weather (Meteorology) Met Office

    The United Kingdom's national meteorological service, responsible for providing weather and climate-related services, including marine...

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  • Organisation NATO

    An intergovernmental military alliance established in 1949 aimed to ensure the collective defence of its member state through political and...

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  • Organisation NLB

    The Northern Lighthouse Board is a maritime organisation responsible for maintaining lighthouses and navigation aids in Scotland and the Isle of...

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  • Organisation North Atlantic Treaty Organization (NATO)

    An intergovernmental military alliance established in 1949 aimed to ensure the collective defence of its member state through political and...

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  • Organisation Northern Lighthouse Board (NLB)

    The Northern Lighthouse Board is a maritime organisation responsible for maintaining lighthouses and navigation aids in Scotland and the Isle of...

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  • Organisation RINA

    An internationally renowned professional institution representing naval architects and marine engineers worldwide. It was founded in 1860 and is...

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  • Organisation RNLI

    The volunteer crewed rescue service providing 24-hour rescue services around the UK and Irish coastline. They also provide seasonal lifeguards...

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  • Organisation Royal National Lifeboat Institution (RNLI)

    The volunteer crewed rescue service providing 24-hour rescue services around the UK and Irish coastline. They also provide seasonal lifeguards...

    More Details
  • Organisation Royal Yachting Association (RYA)

    The national governing body for sailing, motorboating, and other recreational boating activities in the United Kingdom. 

    The Royal Yachting...

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  • Organisation RYA

    The national governing body for sailing, motorboating, and other recreational boating activities in the United Kingdom. 

    The Royal Yachting...

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  • Organisation The Royal Institution of Naval Architects (RINA)

    An internationally renowned professional institution representing naval architects and marine engineers worldwide. It was founded in 1860 and is...

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  • Organisation Trinity House

    Trinity House is a maritime organisation responsible for maintaining navigational aids, including lighthouses and buoys, along England, Wales,...

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  • Organisation UKHO

    The UK government agency responsible for producing nautical charts, publications, and navigational information to support safe maritime...

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  • Organisation UK Hydrographic Office (UKHO)

    The UK government agency responsible for producing nautical charts, publications, and navigational information to support safe maritime...

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  • Organisation UN

    An international organisation founded in 1945 aimed at promoting peace, security, and cooperation among countries worldwide.

    The United...

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  • Organisation United Nations (UN)

    An international organisation founded in 1945 aimed at promoting peace, security, and cooperation among countries worldwide.

    The United...

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  • Organisation United States Naval Observatory (USNO)

    A scientific institution operated by the United States Navy that specialises in astronomical and timekeeping research, providing precise...

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  • Organisation USCG

    A United States Armed Forces branch, responsible for maritime safety, security, and environmental stewardship in domestic and international...

    More Details
  • Organisation U.S. Coast Guard (USCG)

    A United States Armed Forces branch, responsible for maritime safety, security, and environmental stewardship in domestic and international...

    More Details
  • Organisation USNO

    A scientific institution operated by the United States Navy that specialises in astronomical and timekeeping research, providing precise...

    More Details
  • Organisation World Sailing (ISAF)

    World Sailing, formerly known as the International Sailing Federation (ISAF), is the governing body for the sport of sailing...

    More Details

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