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, Safety, Sea State & Waves, Weather (Meteorology) Depression
An area of relatively low atmospheric pressure, usually associated with cyclonic circulation and unsettled weather.
In the Northern Hemisphere...
More Details - General Nautical Terminology, Nautical Topics, Depths & Clearance, Navigation Depth Contour
A line on a nautical chart joining points of equal charted depth relative to the chart’s vertical datum.
Also called an isobath, a depth...
More Details - General Nautical Terminology, Nautical Topics, Depths & Clearance, Navigation, Parts of a Boat, Safety Depth Gauge
An instrument displaying water depth or the measured distance beneath a vessel from an acoustic transducer or other sensor.
Most small-craft...
More Details - General Nautical Terminology, Nautical Topics, Weather (Meteorology) Dew Point
The temperature to which air must be cooled, at approximately constant pressure and moisture content, to become saturated.
When air...
More Details - General Nautical Terminology, Nautical Topics, Signals & Communication Diaphone
A powerful compressed-air sound signal that produces a distinctive low-pitched blast.
A diaphone uses a slotted reciprocating piston to...
More Details - Courses, General Nautical Terminology, Nautical Topics, RYA, Navigation, Safety Diesel Engine
An RYA introductory maintenance course explaining the operation and routine care of small marine diesel engines.
It covers the four-stroke...
More Details - Abbreviation, General Nautical Terminology, Nautical Topics, Navigation, Signals & Communication Differential GPS (DGPS)
A system that improves GPS accuracy using corrections from a surveyed reference station.
A charted DGPS station is a radio aid to navigation.
- General Nautical Terminology, Nautical Topics, Safety, Signals & Communication Digital Selective Calling (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, Navigation, Signals & Communication Dilution of Precision (DOP) (DOP)
A dimensionless factor describing how satellite geometry amplifies ranging and timing errors in a GNSS position or time solution.
Satellites...
More Details - General Nautical Terminology, Nautical Topics, Parts of a Boat, Points of Sail, Safety Dinghy
A small, usually open boat used independently or as a tender to a larger vessel.
A sailing dinghy is a lightweight craft sailed for training,...
More Details - Courses, General Nautical Terminology, Nautical Topics, RYA, Points of Sail, Safety Dinghy Club Racing
An RYA intermediate racing course developing the skills needed to compete effectively at club level in a dinghy.
It builds boat handling,...
More Details - Courses, General Nautical Terminology, Nautical Topics, RYA, Points of Sail, Safety Dinghy Day Sailing
An RYA practical module developing the planning and execution of a short day passage in a dinghy.
It combines pilotage, weather, local...
More Details - Courses, General Nautical Terminology, Nautical Topics, RYA, Points of Sail, Safety Dinghy Foiling First Flights
An RYA practical foiling course introducing controlled take-off and the first short flights on a dinghy.
Training develops equipment...
More Details - Courses, General Nautical Terminology, Nautical Topics, RYA, Points of Sail, Safety Dinghy Foiling Performance Flights
An RYA practical foiling course developing longer, more controlled and efficient flight on a dinghy.
It refines take-off, ride height,...
More Details - Courses, General Nautical Terminology, Nautical Topics, RYA, Points of Sail, Safety Dinghy Foiling Sustained Flights
An RYA practical foiling course developing continuous, controlled flight and linked manoeuvres on a dinghy.
Training consolidates take-off,...
More Details - Courses, General Nautical Terminology, Nautical Topics, RYA, Points of Sail, Safety Dinghy Level 1 - Start Sailing
The first adult RYA National Sailing Scheme practical course, introducing sailing in a dinghy.
It develops basic steering, sail control,...
More Details - Courses, General Nautical Terminology, Nautical Topics, RYA, Points of Sail, Safety Dinghy Level 2 - Basic Skills
The second adult RYA National Sailing Scheme practical course, developing independent sailing in a dinghy in good conditions.
It consolidates...
More Details - Courses, General Nautical Terminology, Nautical Topics, RYA, Points of Sail, Safety Dinghy Level 3 - Better Sailing
An RYA National Sailing Scheme practical course consolidating Level 2 skills and introducing more advanced sailing in a dinghy.
Training...
More Details - Courses, General Nautical Terminology, Nautical Topics, RYA, Points of Sail, Safety Dinghy Performance Sailing
An RYA advanced practical module developing efficient boat handling, sail trim and performance in a dinghy.
Training applies the five...
More Details - Courses, General Nautical Terminology, Nautical Topics, RYA, Points of Sail, Safety Dinghy Regional Racing
An RYA advanced racing course developing performance at different venues and in more demanding dinghy competition.
Training refines...
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