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, Navigation, Parts of a Boat Magnetic North
The northerly reference direction indicated by a magnetic compass free from local compass error.
Magnetic north follows the local direction of...
More Details - General Nautical Terminology, Nautical Topics, Navigation Magnetic Variation
The angular difference at a location between true north and magnetic north.
Also called magnetic declination, it is named east or west...
More Details - General Nautical Terminology, Nautical Topics, Navigation, Organisation, Safety MAIB
An independent unit of the UK Department for Transport that investigates marine accidents to improve safety and prevent recurrence.
The Marine...
More Details - General Nautical Terminology, Nautical Topics, Parts of a Boat, Points of Sail, Safety Mainsail
The sail set on the mainmast and normally regarded as the principal sail of that mast.
On a modern sloop or cutter it is usually a...
More Details - General Nautical Terminology, Nautical Topics, Parts of a Boat, Points of Sail, Safety Mainsheet Traveller (Traveler)
An adjustable fitting or car that moves the mainsheet's effective deck attachment across or along the vessel.
On many yachts the car runs on a...
More Details - General Nautical Terminology, Nautical Topics, Mooring & Berthing, Parts of a Boat, Safety Make Fast
To secure a line or object so that it remains held in the required position.
A line may be made fast to a cleat, bollard, bitt, samson post or...
More Details - General Nautical Terminology, Nautical Topics, Parts of a Boat, Points of Sail, Safety Make Sail
To set or increase sail in preparation for or while proceeding under sail.
Making sail can include hoisting, unfurling or setting one or more...
More Details - General Nautical Terminology, Nautical Topics, Navigation, Safety Making Way
Moving through the water rather than merely moving over the ground with the surrounding water.
A vessel may be making way under engine, sail,...
More Details - General Nautical Terminology, Nautical Topics, Navigation, Weather (Meteorology) Malin
A named sea area used in the UK Shipping Forecast, covering waters north of Ireland and west of Scotland.
The area takes its name from Malin...
More Details - General Nautical Terminology, Nautical Topics, Navigation, Safety, Signals & Communication Man Overboard (Person Overboard)
An emergency in which a person has fallen or been lost from a vessel into the water.
Immediate actions normally include raising the alarm,...
More Details - General Nautical Terminology, Nautical Topics, Safety Man Overboard Recovery
The coordinated manoeuvre and equipment use required to locate, reach and recover a person from the water.
Immediate priorities include...
More Details - General Nautical Terminology, Nautical Topics, Mooring & Berthing, Navigation, Organisation, Safety Marina
A sheltered berthing facility for recreational and small commercial craft, normally organised around pontoons, quays or mooring berths.
More Details - General Nautical Terminology, Nautical Topics, Navigation, Organisation, Safety Marine Accident Investigation Branch (MAIB)
An independent unit of the UK Department for Transport that investigates marine accidents to improve safety and prevent recurrence.
The Marine...
More Details - General Nautical Terminology, Nautical Topics, Parts of a Boat, Safety, Signals & Communication Marine Pyrotechnic
A signal or device that uses a controlled energetic chemical reaction to produce light, smoke, sound or heat.
Marine pyrotechnics include...
More Details - Courses, General Nautical Terminology, Nautical Topics, RYA, Navigation, Safety Marine Radio VHF (SRC)
The training and examination route for the Short Range Certificate used to operate marine VHF and VHF DSC equipment.
It covers radio controls,...
More Details - General Nautical Terminology, Nautical Topics, Parts of a Boat, Safety, Signals & Communication Marine VHF Radio
A short-range marine radiocommunication system operating in internationally allocated very-high-frequency channels.
It supports ship-to-ship,...
More Details - General Nautical Terminology, Nautical Topics, Organisation, Safety Maritime and Coastguard Agency (MCA) (MCA)
The United Kingdom executive agency responsible for maritime safety, seafarer and ship standards, coastguard coordination and marine pollution...
More Details - General Nautical Terminology, Nautical Topics, Organisation Maritime Declaration of Health
A formal health declaration supplied by a ship to the competent authority at a port.
It reports specified illnesses, deaths and other health...
More Details - General Nautical Terminology, Nautical Topics, Organisation, Safety, Signals & Communication Maritime Mobile Service Identity (MMSI) (MMSI)
A nine-digit identity transmitted by maritime radio systems to identify a ship, coast station, group or other assigned station type.
MMSIs are...
More Details - General Nautical Terminology, Nautical Topics, Organisation, Safety, Signals & Communication Maritime Rescue Coordination Centre (MRCC) (MRCC)
A shore facility that coordinates maritime search-and-rescue operations within an assigned search-and-rescue region.
An MRCC receives distress...
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