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.
-
TermDefinition
- General Nautical Terminology, Nautical Topics, Mooring & Berthing Boat Hook
A pole fitted with a hook and usually a blunt point, used to pick up or control objects just beyond reach.
A boat hook is commonly used to...
More Details - General Nautical Terminology, Nautical Topics, Maritime Language & Traditions Boatswain's Call
A high-pitched whistle used to sound traditional naval and shipboard orders or ceremonies.
Different combinations of pitch, duration and trill...
More Details - General Nautical Terminology, Nautical Topics, Navigation, Points of Sail, Weather (Meteorology) Boat Wind (Motion Wind)
The airflow component attributable to a vessel’s own motion through the surrounding air.
It is a teaching term used when constructing apparent...
More Details - General Nautical Terminology, Nautical Topics, Mooring & Berthing Bollard
A strong post on a quay, pier or pontoon to which a vessel’s mooring lines are secured.
Bollards are fixed to a structure capable of accepting...
More Details - General Nautical Terminology, Nautical Topics, Parts of a Boat, Points of Sail, Safety Boom
A spar attached to or associated with a mast that controls the foot and position of a sail.
On a conventional mainsail the boom extends aft...
More Details - General Nautical Terminology, Nautical Topics, Points of Sail Boom Out
To hold a headsail out to windward, usually with a pole, when sailing downwind.
When a boat is running, the mainsail can shield the headsail...
More Details - General Nautical Terminology, Nautical Topics, Parts of a Boat, Points of Sail, Safety Boom Preventer
A line or tackle rigged to restrain a boom from crossing the vessel unintentionally.
A properly arranged preventer leads from a suitable point...
More Details - General Nautical Terminology, Nautical Topics, Parts of a Boat Boom Sweep
The area through which a boom can travel as it moves across a vessel.
Crew, passengers, rigging and equipment should be kept clear because the...
More Details - General Nautical Terminology, Nautical Topics, Parts of a Boat, Points of Sail, Safety Boom Vang (Kicking Strap)
A tackle, strut or powered control that restrains or adjusts a boom's vertical movement.
Known as a kicking strap in British usage, it...
More Details - General Nautical Terminology, Nautical Topics, Safety, Sea State & Waves, Weather (Meteorology) Bora
A strong, gusty, cold downslope wind blowing from the Balkan interior towards the eastern Adriatic.
Dense air crossing mountain passes...
More Details - General Nautical Terminology, Nautical Topics, Mooring & Berthing, Organisation, Parts of a Boat Bosun (Boatswain)
The senior deck crew member responsible for supervising deck work, maintenance and seamanship equipment.
The bosun normally allocates and...
More Details - General Nautical Terminology, Nautical Topics, Weather (Meteorology) Boundary Conditions
The specified values or constraints applied at the edges of a mathematical or physical model.
In marine forecasting and tidal modelling they...
More Details - General Nautical Terminology, Nautical Topics, Navigation, Parts of a Boat Bow
The forward part of a vessel.
The bow includes the hull structure at and around the vessel’s forward end, where the port and starboard sides...
More Details - General Nautical Terminology, Nautical Topics, Mooring & Berthing, Parts of a Boat, Safety Bow Line
A mooring line leading from the bow area of a vessel to a shore fitting or other secure point.
It helps control the bow’s position and is used...
More Details - General Nautical Terminology, Nautical Topics, Mooring & Berthing, Safety Bowline
A knot that forms a fixed loop which normally does not tighten when loaded.
A correctly dressed bowline is widely used to form an eye around a...
More Details - General Nautical Terminology, Nautical Topics, Parts of a Boat, Safety Bow Pulpit
A rigid guardrail structure around part of a vessel's bow.
The pulpit normally connects with the side guardrails or lifelines and helps reduce...
More Details - General Nautical Terminology, Nautical Topics, Mooring & Berthing, Parts of a Boat, Safety Bow Spring
A spring line led from the bow area of a vessel towards a shore point farther aft.
Its fore-and-aft lead primarily checks the vessel’s forward...
More Details - General Nautical Terminology, Nautical Topics, Parts of a Boat, Points of Sail, Safety Bowsprit
A spar projecting forward from a vessel’s bow to support rigging or the tack of a forward sail.
On traditional rigs it may carry forestays and...
More Details - General Nautical Terminology, Nautical Topics, Phonetic Alphabet, Signals & Communication Bravo
The standard spoken code word for the letter B in the international radiotelephony spelling alphabet.
It is pronounced “BRAH-voh” and is used...
More Details - General Nautical Terminology, Nautical Topics, Mooring & Berthing Break Out an Anchor
To dislodge an anchor from the seabed after its cable has been brought near vertical.
The vessel is normally manoeuvred carefully toward the...
More Details







