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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

Ahoy there! Did you know that sailors used to believe whistling on a ship could summon a storm, but now it just summons the captain asking who’s off-key? Or that the humble 'starboard' and 'port' aren’t just fancy ways to say 'right' and 'left,' but actually prevent sailors from yelling, 'No, my right!' at each other? And here’s a kicker: some buoys have horns because, apparently, even the ocean needs to honk at clueless boaters. The nautical world is full of these tidbits, proving that life at sea isn’t just waves—it’s a wave of weirdness!

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Results: 24
  • Term
    Definition
  • Did you know? As the crow flies

    The phrase "as the crow flies," meaning the most direct route, is believed to originate from the marine world. It refers to crows being released...

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  • Did you know?, General Nautical Terminology Bosun

    Short for boatswain, the Bosun is a senior crew member responsible for the vessel's maintenance, repair, and overall operation. The bosun...

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  • Did you know?, Nautical Saying By and Large

    “By and large”—another classic sailing phrase that’s drifted into everyday English. Here’s the nautical story behind it:

    ⚓ Nautical Origin of...

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  • Did you know?, Nautical Saying Chock-a-block

    Chock-a-block is a nautical term describing when two blocks (pulleys) are pulled so close together that they cannot be tightened further. It...

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  • Did you know?, Nautical Saying Clean Bill of Health

    ⚓ Nautical Origin of A Clean Bill of Health:

    Back in the 18th and 19th centuries, when ships traveled from port to port, they could carry more...

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  • Did you know?, General Nautical Terminology Eco Mooring Buoy

    A specially designed mooring system that allows vessels to anchor without damaging the seabed, particularly sensitive habitats like seagrass beds...

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  • Did you know?, General Nautical Terminology Feeling Blue

    The phrase "feeling blue" is commonly used to describe sadness or melancholy, and its origins are often linked to nautical traditions.

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  • Did you know?, Flag Semaphore, Signals & Communication Flag Semaphore Signals

    A system for conveying information at a distance through visual signals using hand-held flags.

    The position of the flags encodes the...

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  • Did you know?, General Nautical Terminology, Navigation IDL

    An imaginary longitudinal line located at approximately 180 degrees longitude serving as the demarcation where the calendar date changes by one...

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  • Did you know?, General Nautical Terminology, Navigation International Date Line (IDL)

    An imaginary longitudinal line located at approximately 180 degrees longitude serving as the demarcation where the calendar date changes by one...

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  • Did you know?, Navigation International Meridian Conference

    A diplomatic meeting held in 1884 in Washington, D.C., where representatives from 25 nations convened to establish a standard prime meridian for...

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  • Did you know?, Safety International Radiotelegraph Conference (IRC)

    A series of meetings establishing global standards and regulations for using radiotelegraphy, particularly in maritime communication.

    The...

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  • Did you know?, Safety IRC

    A series of meetings establishing global standards and regulations for using radiotelegraphy, particularly in maritime communication.

    The...

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  • Did you know?, Phonetic Alphabet, Signals & Communication Juliett

    Pronounced: JOO-lee-ETT

    The term for the letter J in the NATO Phonetic Alphabet.

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  • Did you know?, Nautical Saying Pipe down

    Pipe down is a nautical term meaning to quiet down or cease talking. It is often used as a command on a boat or ship to instruct crew members or...

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  • Did you know?, Nautical Saying Pressed into service

    Pressed into service is the term used to describe the action of the British Navy filling their ships’ crew quotas by kidnapping men off the...

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  • Did you know?, Nautical Saying Press Gangs

    Press gangs were groups of men employed by the British Royal Navy in the 17th to 19th centuries to forcibly recruit individuals into naval...

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  • Did you know? The Bitter End

    "The bitter end" is a nautical term referring to the very end of a rope or chain secured to a ship or boat. Its name is derived from the sturdy...

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  • Did you know? The Challenger of Record

    The Challenger of Record is the yacht club or team officially representing the first challenging team in a sailing competition, such as the...

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  • Did you know?, Nautical Saying Three sheets to the wind

    The phrase “three sheets to the wind” comes straight from nautical life—and originally had nothing to do with drinking at all!

    🚢 Nautical...

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  • Did you know? Tomasz Schafernaker

    Tomasz Schafernaker is a well-known meteorologist and television weather presenter for the BBC.

    Born on January 8, 1979, in Gdańsk,...

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  • Did you know?, Nautical Saying Under the Weather

    Under the weather is commonly used to describe feeling ill or unwell. Its origins can be traced back to maritime language. It originated from the...

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  • Did you know? Unlucky Bananas

    If you've ever set sail or chatted with seasoned sailors, you might have stumbled upon a curious maritime superstition: bananas are bad luck on...

    More Details
  • Did you know?, Phonetic Alphabet, Signals & Communication Whiskey

    Pronounced: WISS-key

    The term for the letter W in the NATO Phonetic Alphabet.

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