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Glossary of Sailing Terms

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The direction the boat is pointing, shown in degrees on a compass.

Any sail set forward of the mast, such as a genoa or jib.

When a sailboat leans over due to wind pressure in the sails. Moderate heeling is normal, but it must be managed properly.

The control system used to steer the boat. This can be either a wheel or a tiller.

A heavy vertical blade or fin attached to the hull of a boat, which provides stability.

A unit of speed at sea: one knot = one nautical mile per hour (approx. 1.15 mph or 1.85 km/h).

The side of the boat or direction away from the wind. Sail trim and crew positioning change depending on the windward/leeward balance.

The record of your voyage, including position, speed, time, and weather. Also refers to the instrument used to measure speed through the water.

The rope controlling the angle of the mainsail.

An upright spar or post carrying a sail.

An emergency situation where someone falls overboard. MOB drills are practised in all RYA courses for safety.

The process of securing a boat to a fixed point (e.g., buoy, pontoon, or quay).

A unit of distance used at sea, based on the Earth’s circumference. One nautical mile equals 1.852 kilometres or about 1.15 land miles.

Sailing out of sight of land, usually more than 60 nautical miles from a safe haven. Courses like Yachtmaster Offshore focus on advanced navigation and seamanship in these conditions.

A control line used to tension the foot of the mainsail.

Preparing a route in advance, including tides, hazards, alternate ports, and weather. Required for all skipper-level qualifications.

The left-hand side of the boat when facing forward.

A line rigged to prevent the boom from swinging across in the event of an accidental gybe.

A command given when on the helm to alert the crew when you’re ready to tack.

Reducing the size of the sails in strong wind conditions to maintain control and safety.

The underwater fin at the back of the boat used for steering.

The person legally and practically in charge of the vessel. Responsible for crew safety, navigation, and decision-making.

Measuring water depth, either manually or via an electronic depth sounder.

A large, lightweight sail used when sailing downwind. Used in more advanced courses, such as Yachtmaster or when racing.