Glossary
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TermDefinition
- 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 - General Nautical Terminology, Navigation UTC
The primary time standard by which the world regulates clocks and time serving as the basis for civil time globally.
Coordinated Universal...
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
A line or tackle system used to control the angle of a boom on a sailing vessel, preventing it from lifting and stabilising the sail.
The...
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
The angular difference between true north and magnetic north, also known as magnetic declination, which affects compass readings.
Variation is...
More Details - Flag / Pennant, Signals & Communication Code Flag Victor (V)
The International Maritime Signal Flag Victor.
Meaning
I require assistance.
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If appended with a Numeral Pennant, Velocity in kilometres... - General Nautical Terminology VDOP
A measure used in satellite navigation systems, such as GPS, to quantify the impact of satellite geometry on vertical positioning accuracy. It...
More Details - General Nautical Terminology, Navigation Vector Chart
A digital nautical chart that represents navigational data using vector graphics, allowing for scalable and interactive mapping of maritime...
More Details - General Nautical Terminology, Navigation Velocity Made Good (VMG)
Velocity Made Good (VMG) is a nautical term that refers to the speed at which a vessel progresses towards a specific point of interest, typically...
More Details - General Nautical Terminology Vertical Dilution of Precision (VDOP)
A measure used in satellite navigation systems, such as GPS, to quantify the impact of satellite geometry on vertical positioning accuracy. It...
More Details - General Nautical Terminology, Signals & Communication Very High Frequency (VHF)
A range of radio frequencies from 30 MHz to 300 MHz, commonly used in marine communication for short-range, line-of-sight transmissions.
Very...
More Details - General Nautical Terminology Vessel
Any craft designed for transportation on water, including ships, boats, and other waterborne vehicles.
A vessel is any structure or craft...
More Details - General Nautical Terminology, Navigation, Safety Vessel Traffic Service (VTS)
A shore-based system that monitors and manages vessel movements in busy or hazardous waterways to enhance safety, efficiency, and environmental...
More Details - General Nautical Terminology, Signals & Communication VHF
A range of radio frequencies from 30 MHz to 300 MHz, commonly used in marine communication for short-range, line-of-sight transmissions.
Very...
More Details - General Nautical Terminology, Safety, Signals & Communication VHF Radio
A communication device that operates on Very High Frequency (VHF) radio waves, used for ship-to-ship, ship-to-shore, and emergency maritime...
More Details - Phonetic Alphabet, Signals & Communication Victor
Pronounced: VIK-tah
The term for the letter B in the NATO Phonetic Alphabet.
- General Nautical Terminology Victualling
The process or system of provisioning a ship with necessary supplies, especially food and drink, for the crew's sustenance during a...
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