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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 202428th December 2025 Last Updated:28th December 2025
General Nautical Terminology

Tender

A small boat used to transport people or goods between a larger vessel and the shore or another vessel. 

A tender is an essential component of maritime operations, particularly for larger vessels that cannot dock directly at a pier or shallow waters due to their size or draught. Tenders are typically smaller, versatile boats designed to ferry passengers, crew, supplies, and equipment between the primary vessel and the shore or other nearby locations. They are indispensable for yachts, cruise ships, and certain commercial vessels, allowing them to maintain functionality and accessibility even when anchored offshore. Tenders come in various forms, including rigid-hulled boats, inflatable dinghies, or rigid-inflatable boats (RIBs), each suited to specific tasks and conditions. 

In addition to their practical transport role, tenders often serve as lifeboats or emergency craft, ensuring safety in the event of an evacuation. On luxury yachts, tenders may also be used for recreational purposes, such as fishing, diving, or exploring coastal areas. They are typically equipped with outboard motors or small inboard engines, providing the necessary manoeuvrability and speed. The design and outfitting of a tender depend on the needs of the primary vessel and its crew, with some tenders featuring advanced navigation systems, seating arrangements, or storage compartments. 

In essence, the tender acts as the indispensable link between a vessel and the shore, embodying both practicality and versatility in maritime operations.

Related Content:
  • VHF Marine Radio License Guide: Get Your UK VHF Marine Radio License

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