Glossary
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TermDefinition
- General Nautical Terminology Direction of BuoyageIndicates which side the Port and Starboard marks will be found if you are navigating in a channel
- General Nautical Terminology DisplacementThe weight of a vessel defined as the weight of water displaced by that vessel
- General Nautical Terminology Displacement VesselA displacement hull moves (pushes apart) the water it passes through. Hence displacing the water.
- General Nautical Terminology Distance
The length of space between two points, often measured in nautical miles when referring to distances at sea.
In maritime contexts, "distance"...
More Details - General Nautical Terminology Distance to Waypoint (DTW)
Distance to Waypoint indicates the distance between the vessel and a specific point or location known as a waypoint. The distance is given as the...
More Details - General Nautical Terminology Dividers
Instrument with two points used to measure distances and assist chart work.
- Flag Semaphore, Signals & Communication Letter D (Flag Semaphore)
This shape represents the Letter D (Flag Semaphore) and the Number 4 (Flag Semaphore).
- Morse Code, Signals & Communication Letter D (Morse Code)
International Morse Code sequence representing the letter D.
- General Nautical Terminology DodgerScreen fitted to give the crew protection from wind and spray
- General Nautical Terminology DolphinA mooring post or group of piles
- General Nautical Terminology, Navigation DOP
Used in satellite navigation and geolocation to provide the likely accuracy of a satellite-derived position.
The DOP concept is essential to...
More Details - General Nautical Terminology Double UpTo put out extra mooring lines when a storm is expected
- General Nautical Terminology DouseTo lower a sail; To extinguish a light quickly
- General Nautical Terminology Downhaul
A downhaul is a line or tackle to apply downward tension on a sail or spar to control its shape and optimise performance.
The downhaul is an...
More Details - General Nautical Terminology DownstreamThe direction towards which the stream flows
- General Nautical Terminology Downwind
Refers to the direction in which the wind is blowing relative to a specific point of reference.
When sailing or navigating on the water,...
More Details - General Nautical Terminology, Navigation DR
A navigational method used to estimate a vessel's current position based on a previously known position, factoring in speed, time, and course...
More Details - General Nautical Terminology DragThe anchor drags when it fails to hold and slides over the seabed
- General Nautical Terminology DraughtThe vertical distance from the lowest part of the keel to the waterline
- General Nautical Terminology DredgerA vessel for dredging a channel