Glossary
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TermDefinition
- General Nautical Terminology, Navigation TSS
A Traffic Separation Scheme (TSS) is a maritime navigation system designed to organise the flow of vessel traffic in congested or high-risk...
More Details - General Nautical Terminology, Navigation TTGEstimated time remaining to a waypoint giving an indication of arrival time
- General Nautical Terminology Turn
When a rope passes around an object, such as a post, when tying a knot.
- General Nautical Terminology, Navigation TZMost tide tables are produced in the standard time for the time zone(s) of the nation in which they apply. These times may need to be corrected at... More Details
- Flag / Pennant, Signals & Communication Code Flag Uniform (U)
The International Maritime Signal Flag Uniform.
Meaning
You are running into danger.
- Flag Semaphore, Signals & Communication Letter U (Flag Semaphore)
Flag semaphore indicating the letter U.
- Morse Code, Signals & Communication Letter U (Morse Code)
International Morse Code sequence representing the letter U.
- General Nautical Terminology Ultraviolet (UV)
Ultraviolet (UV) light is a type of electromagnetic radiation with a wavelength shorter than visible light but longer than X-rays. In the marine...
More Details - Organisation UN
An international organisation founded in 1945 aimed at promoting peace, security, and cooperation among countries worldwide.
The United...
More Details - General Nautical Terminology Underhand loop
A loop which crosses under the standing part of a rope when tying a knot.
- 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...
More Details - General Nautical Terminology Underway
Underway refers to vessels not anchored or made fast to the shore (for example, a marina or mooring buoy). The vessel may be moving due to the...
More Details - Phonetic Alphabet, Signals & Communication Uniform
Pronounced: YOU-nee-form
The term for the letter U in the NATO Phonetic Alphabet.
- Organisation United Nations (UN)
An international organisation founded in 1945 aimed at promoting peace, security, and cooperation among countries worldwide.
The United...
More Details - 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 - General Nautical Terminology UV
Ultraviolet (UV) light is a type of electromagnetic radiation with a wavelength shorter than visible light but longer than X-rays. In the marine...
More Details - General Nautical Terminology Vang
Runs from the base of the mast to a point about a third of the way along the boom. A vang or kicker is used to exert downward force on the boom...
More Details - General Nautical Terminology Vanishing Angle
The maximum degree of heel after which a vessel becomes unlikely to return to an upright position.
- General Nautical Terminology, Navigation Variation
Variation (magnetic declination) refers to the angular difference between true north and magnetic north at a specific location on the Earth’s...
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