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TermDefinition
- Geodetic North True North refers to the geographic direction towards the Earth’s geographic North Pole. The direction along the Earth’s surface points(...) Read more
- True North True North refers to the geographic direction towards the Earth’s geographic North Pole. The direction along the Earth’s surface points(...) Read more
- Ultraviolet Ultraviolet (UV) light is a type of electromagnetic radiation with a wavelength shorter than visible light but longer than X-rays. In the(...) Read more
- UV Ultraviolet (UV) light is a type of electromagnetic radiation with a wavelength shorter than visible light but longer than X-rays. In the(...) Read more
- 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(...) Read more
- Magnetic Declination Variation (magnetic declination) refers to the angular difference between true north and magnetic north at a specific location on the Earth’s(...) Read more
- Variation Variation (magnetic declination) refers to the angular difference between true north and magnetic north at a specific location on the Earth’s(...) Read more
- Vessel A vessel refers to any watercraft or ship used for transportation on the water. Vessels can range from small boats and ships to large(...) Read more
- Way Speed, progress, or momentum through the water. More technically, the point at which there is sufficient water flow past a vessel's rudder for(...) Read more
- Windage Windage refers to the resistance or drag experienced by a boat or ship as it moves through the air. Windage is influenced by the vessel’s(...) Read more
- Yacht A yacht is a recreational boat or ship, typically larger than a standard pleasure craft. Yachts are often used for private cruising, racing, or(...) Read more
- Number 1 - One (Wun) "Wun" is a phonetic way of saying "one" in military or marine radio communication. It is used to ensure clear and concise communication over(...) Read more
- Number 2 - Two (Too) In marine terminology, "2" or "two" refers to the number two or the second in a series of items or actions. It can denote the quantity of(...) Read more
- Number 3 - Three (Tree) In marine terminology, "three" (often pronounced as "tree" in a maritime context) is a signal used to indicate the number 3 in communication(...) Read more
- Number 4 - Four (For Er) "Four" is the numerical value representing the quantity of 4. In marine terminology, "four" is also used to refer to the fourth officer on a(...) Read more
- Number 5 - Five (Fife) "Five" is a numerical term representing the quantity of 5. In marine terminology, it may refer to a group of five individuals or objects, such(...) Read more
- Number 6 - Six In marine terminology, "6" or "six" does not have a specific nautical meaning. It is simply the numerical value representing the quantity of(...) Read more
- Number 7 - Seven (Sev-En) In maritime terminology, 7 or Seven (Sev-En) refers to the International Code of Signals flag representing the letter "7" in the phonetic(...) Read more
- Number 8 - Eight (Ait) In marine terminology, an "ait" refers to a small island or islet located in a river or estuary. Aits are typically formed by sediment(...) Read more
- Number 9 - Nine (Nin Er) In marine terminology, "9" or "nine" is a code used to indicate the number nine in radio communications or when spelling out numbers. This code(...) Read more