Sailing terms and nautical glossary
Find clear definitions of sailing terms, boat parts, knots, navigation and nautical abbreviations. New to sailing? Start with the everyday words below, then explore the full glossary by subject or search for a term.
Sailing terms for beginners
Begin with port and starboard, bow, windward and leeward. Learn how sheets and halyards control sails, then explore points of sail, tacking and gybing.
For terms in context, read our beginner sailing vocabulary guide. Ready to practise on the water? Our first sailing course guide explains how to choose a starting route.
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TermDefinition
- General Nautical Terminology, Nautical Topics, Depths & Clearance, Navigation, Weather (Meteorology) Drift
To move under the influence of wind, waves or water flow rather than a deliberately maintained track.
A vessel can drift when stopped,...
More Details - General Nautical Terminology, Nautical Topics, Parts of a Boat, Points of Sail Drifter
A lightweight, usually genoa-shaped headsail intended for very light winds.
It may be set on hanks, on a suitable furler or flying, depending...
More Details - General Nautical Terminology, Nautical Topics, Navigation Drifting Buoy
A buoy that is no longer held in its charted or intended position and is moving with wind or current.
It may give dangerously misleading...
More Details - General Nautical Terminology, Nautical Topics, Parts of a Boat, Safety, Sea State & Waves Drogue
A drag device streamed from a vessel to reduce speed through the water or influence its orientation.
Drogues include cones, fabric devices and...
More Details - General Nautical Terminology, Nautical Topics, Depths & Clearance, Navigation Drying Height
The charted height of a feature above chart datum when that feature covers and uncovers with the tide.
Drying heights are used for rocks,...
More Details - General Nautical Terminology, Nautical Topics, Safety, Signals & Communication DSC
A marine-radio system for sending digitally encoded alerts and calls to selected stations or groups.
Digital Selective Calling, or DSC,...
More Details - General Nautical Terminology, Nautical Topics, Safety, Signals & Communication DSC Distress Alert
A digitally encoded distress transmission sent by Digital Selective Calling equipment.
The alert identifies the station and may include...
More Details - General Nautical Terminology, Nautical Topics, Navigation DTW
The calculated separation between a vessel’s current position and a selected waypoint.
A GNSS receiver or chartplotter normally updates this...
More Details - General Nautical Terminology, Nautical Topics, Parts of a Boat Dynamic Lift
Lift produced by fluid flow around a moving foil, hull or planing surface.
It increases with speed, fluid density, area and lift coefficient...
More Details - General Nautical Terminology, Nautical Topics, Parts of a Boat, Safety Dyneema
A trade name for ultra-high-molecular-weight polyethylene fibre used in high-strength, low-stretch marine ropes and fabrics.
The fibre has a...
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