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Sailing Terms Glossary

206 beginner sailing terms in plain English, grouped the way the SailStarter course teaches them: boat parts, wind and sailing, maneuvers, navigation and rules, anchoring and mooring, weather, and charter and ownership language.

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Boat Parts

  • Aft

    Toward the stern, the back of the boat. A locker "aft of the mast" sits closer to the stern than the mast does.

  • Beam

    The boat's width at its widest point. Something spotted directly off the side, at a right angle to the boat, is described as "abeam."

  • Bilge

    The lowest inside space of the hull, where water that gets aboard collects before a pump removes it.

  • Block

    A pulley aboard a boat. A line run through a block changes direction or gains mechanical advantage. Sailboat Deck Hardware Explained →

  • Boom

    The horizontal spar attached to the mast that holds the mainsail's bottom edge. It swings across the boat during a tack or jibe, so crew learn to keep their heads clear of it. Sailboat Mast and Boom Explained →

  • Boom Vang

    A line or fitting that pulls the boom down, controlling how much the top of the mainsail twists open. Boom Vang vs Mainsheet vs Traveler →

  • Bow

    The front end of the boat, the part that normally points into the waves. Port vs Starboard →

  • Catamaran

    A boat built on two parallel hulls connected by a deck, generally more stable and flatter-sailing than a monohull of similar length. Catamaran vs Monohull for Beginners →

  • Centerboard

    A retractable fin, usually on a dinghy, that pivots up into a slot in the hull instead of staying fixed like a keel.

  • Chainplate

    The metal fitting bolted through the hull or deck where a shroud or stay anchors, transferring the rig's load into the boat's structure. Sailboat Chainplate Inspection →

  • Cleat

    A fitting a line is wrapped or locked around to hold it under load without a crew member gripping it. Sailboat Deck Hardware Explained →

  • Cockpit

    The recessed area where the crew sits and steers, holding the tiller or wheel and the main controls.

  • Companionway

    The stepped opening leading from the cockpit down into the cabin below.

  • Cunningham

    A control line near the mast that tensions the mainsail's luff, pulling the sail's deepest point forward as the wind builds. Cunningham and Outhaul Explained →

  • Daggerboard

    A retractable fin that slides straight up and down through a slot, rather than pivoting like a centerboard.

  • Deck

    The horizontal surface covering the top of the hull, where crew stand, walk, and work the sails. Parts of a Sailboat →

  • Dinghy

    A small, simple sailboat, usually under about 15 feet, often sailed without an engine and steered by a tiller. Dinghy vs Keelboat →

  • Displacement

    The weight of water a boat pushes aside, which equals the boat's own total weight when it's floating.

  • Draft (hull)

    How deep the boat sits below the waterline at its lowest point, usually the bottom of the keel. Sailboat Draft and Under-Keel Clearance →

  • Forward

    Toward the bow, the front of the boat. Crew usually say "forward" rather than "front" once aboard.

  • Freeboard

    The height of the hull above the waterline, from the water to the deck's edge.

  • Galley

    The boat's kitchen — the space with the stove, sink, and food storage. Cooking on a Sailboat →

  • Halyard

    A line that hoists a sail up the mast. Think "haul yard": it raises the sail, it doesn't trim it. Halyard vs Sheet →

  • The boat's toilet, and the small compartment it sits in. How Does a Sailboat Toilet Work? →

  • Hull

    The watertight shell of the boat — everything below the deck that keeps the water out. Parts of a Sailboat →

  • Keel

    The fin-shaped structure fixed under the hull. Its weight resists the boat tipping over and its shape resists sliding sideways when sailing upwind. Sailboat Keel Types Explained →

  • Keelboat

    A larger sailboat with a fixed, weighted keel, generally more stable and less prone to capsize than a dinghy. Dinghy vs Keelboat →

  • Lifeline

    The wire or webbing strung between stanchions around the deck's edge. It marks the boundary of the deck, but it isn't built to catch a person's full falling weight.

  • LOA (Length Overall)

    The boat's total length, measured from the tip of the bow to the back of the stern.

  • Mast

    The vertical pole, or spar, that stands up from the deck and carries the sails and rigging. Sailboat Mast and Boom Explained →

  • Monohull

    A boat with a single hull, the traditional sailboat shape, as opposed to a catamaran's two hulls. Catamaran vs Monohull for Beginners →

  • Outhaul

    A control line that tensions the mainsail's foot along the boom, flattening or fullening its lower third. Cunningham and Outhaul Explained →

  • Port

    The left side of the boat when you face the bow. It stays fixed to the hull no matter which way you're facing, and it shows a red light at night. Port vs Starboard →

  • Pulpit

    The metal railing around the bow that gives crew something to hold onto at the very front of the boat.

  • Pushpit

    The metal railing around the stern, the back-of-the-boat counterpart to the pulpit.

  • Rudder

    The flat blade at the stern, underwater, that turns the boat when the tiller or wheel moves it. Parts of a Sailboat →

  • Running Rigging

    The lines used to hoist, trim, and control the sails — halyards, sheets, and control lines. Unlike standing rigging, these move constantly while sailing. Running Rigging Inspection and Replacement →

  • Seacock

    A shutoff valve where a through-hull fitting lets water in or out of the boat, closed to stop flooding if a hose or fitting fails.

  • Shackle

    A U-shaped metal connector closed with a pin, used to join a line or chain to a sail, anchor, or fitting. Sailboat Deck Hardware Explained →

  • Sheet

    A line that controls a sail's angle to the wind once it's up. "Ease the sheet" lets the sail out; "trim the sheet" pulls it in. Halyard vs Sheet →

  • Shroud

    A wire running from the mast to the sides of the boat that keeps the mast from falling sideways.

  • Spreader

    A strut sticking out sideways partway up the mast that pushes the shrouds outward, giving them a better angle to support the mast.

  • Stanchion

    A vertical post along the deck's edge that holds up the lifelines.

  • Standing Rigging

    The fixed wires that hold the mast upright — shrouds and stays. They stay tensioned all the time and aren't adjusted while sailing. Standing Rigging Explained →

  • Starboard

    The right side of the boat when you face the bow. It's fixed to the hull, and it shows a green light at night. Port vs Starboard →

  • Stay

    A wire running from the mast to the bow (forestay) or stern (backstay) that keeps the mast from falling forward or aft.

  • Stern

    The back end of the boat, opposite the bow. Port vs Starboard →

  • Tiller

    A steering arm connected directly to the rudder. Push a tiller away from you and the boat's stern swings the same way, turning the bow toward you. Tiller vs Wheel Steering →

  • Transom

    The flat, usually vertical, panel that forms the very back of the hull.

  • Traveler

    A track across the cockpit or cabin top that lets the mainsheet's attachment point slide side to side, changing the mainsail's angle without changing how far it's eased. Boom Vang vs Mainsheet vs Traveler →

  • Wheel

    A steering wheel connected to the rudder by cables or a hydraulic system, common on larger sailboats. Unlike a tiller, turning it clockwise turns the bow to starboard, the same way a car's wheel works. Tiller vs Wheel Steering →

  • Winch

    A drum turned by a handle that multiplies a crew member's pulling force, used for hauling in loaded sheets and halyards. What Is a Winch on a Sailboat? →

Wind & Sailing

  • Apparent Wind

    The wind you actually feel aboard a moving boat: true wind combined with the wind created by the boat's own speed. It's what the sails and telltales respond to. True Wind vs Apparent Wind →

  • Beam Reach

    Sailing with the wind coming from directly abeam, roughly a right angle to the boat — often the fastest, easiest point of sail.

  • Broad Reach

    A point of sail between a beam reach and running, with the wind coming from behind the beam.

  • Close Reach

    A point of sail between close-hauled and a beam reach, with the wind forward of the beam.

  • Close-Hauled

    Sailing as close to directly into the wind as the boat can manage with its sails still drawing power.

  • Draft (Sail)

    The depth and curve built into a sail's shape — a different meaning of "draft" from a hull's draft below the water. Sail Twist and Draft Explained →

  • Foot (Sail)

    The bottom edge of a sail, running along the boom on a mainsail.

  • Gennaker

    A downwind sail that combines features of a genoa and a spinnaker, generally easier to handle than a true spinnaker. Spinnaker vs Gennaker →

  • Genoa

    A large headsail whose back edge overlaps the mast, bigger than a jib and used for extra power in lighter wind. Jib vs Genoa →

  • Gust

    A short, sudden increase in wind speed above the general average.

  • A wind shift that moves the true wind direction toward the boat's bow, forcing it to steer further from its intended course to stay close-hauled. Lifts and Headers Explained →

  • Heel

    The boat leaning over under sail as the wind pushes the rig sideways. A moderate, steady heel is normal sailing, not a sign of trouble. Why Do Sailboats Lean? →

  • In Irons

    Stopped, pointed into the wind, with the sails luffing and no steerage — the boat that has stalled inside the no-go zone. In Irons: What It Means and How to Escape →

  • Jib

    A triangular headsail set forward of the mast, on its own stay or forestay, that fits within the boat's foretriangle. Jib vs Genoa →

  • Lee Helm

    A boat's tendency to turn its bow away from the wind on its own — generally considered less safe than weather helm, since a lost helm turns the boat further off course. Lee Helm Explained →

  • Leech

    The back edge of a sail, from the top down to the clew.

  • Leeward

    The direction the wind is blowing toward, and the side of the boat away from it. Windward vs Leeward →

  • Lift

    A wind shift that moves the true wind direction away from the boat's bow, letting it steer closer to its intended course while staying close-hauled. Lifts and Headers Explained →

  • Luff

    As a noun, a sail's forward edge. As a verb, a sail flapping loosely because it isn't sheeted in enough to hold its shape.

  • Mainsail

    The primary sail set on the mast and boom, present on almost every sailboat rig. Parts of a Sail →

  • No-Go Zone

    The narrow arc directly into the wind, roughly 45 degrees either side of it, where a sailboat's sails can't generate power to move it forward. The No-Go Zone →

  • Pointing

    How close to the wind a boat can sail while still keeping its sails powered — sailing "high" means pointing close to the no-go zone.

  • Points of Sail

    The named angles a boat can sail relative to the wind, from close-hauled through reaching to running, usually pictured as positions around a clock face. Points of Sail Explained →

  • Reef / Reefing

    Reducing a sail's area, usually by rolling or folding part of it down, so it carries less power in stronger wind. How to Reef a Mainsail →

  • Running

    Sailing with the wind coming from close to directly behind the boat.

  • Sail Trim

    Adjusting a sail's sheet, and other controls, to match its shape and angle to the current wind and point of sail. Sail Trim by Point of Sail →

  • Spinnaker

    A large, lightweight, balloon-shaped sail flown in front of the boat for extra power on downwind points of sail. Spinnaker vs Gennaker →

  • Telltale

    A short ribbon or length of yarn attached to a sail that shows how air is flowing over it, streaming smoothly when the sail is trimmed well. Sailing Telltales Explained →

  • True Wind

    The wind you'd feel standing still on land or in the water — its actual speed and direction, independent of the boat's own motion. True Wind vs Apparent Wind →

  • Twist

    The way a sail's upper section angles further off the boat's centerline than its lower section, changing how the whole sail is trimmed top to bottom. Sail Twist and Draft Explained →

  • Weather Helm

    A boat's tendency to turn its bow toward the wind on its own, felt as steady pressure pulling the tiller toward the windward side. Weather Helm Explained →

  • Windward

    The direction the wind is blowing from, and the side of the boat closer to it. Windward vs Leeward →

Maneuvers

  • Bowline

    A knot that ties a fixed loop in the end of a line — it holds firmly under load yet still unties easily afterward. How to Tie a Bowline →

  • Cleat Hitch

    The standard way of securing a line to a cleat, using a turn around the base and figure-eight wraps finished with a locking hitch. How to Tie a Cleat Hitch →

  • Clove Hitch

    A quick, adjustable knot for tying a line to a rail or piling — fast to tie, but prone to slipping under a load that shifts direction. The Clove Hitch →

  • Coiling a Line

    Gathering a length of rope into neat loops so it stores flat and runs out freely later instead of tangling. How to Coil a Line →

  • Coming Alongside

    Approaching and stopping a boat parallel to a dock, another boat, or a wall. How to Dock a Sailboat →

  • Docking

    Bringing the boat alongside a dock or berth and securing it with lines and fenders. How to Dock a Sailboat →

  • Escaping Irons

    Getting a stalled boat sailing again after it stops head-to-wind, typically by backing the jib or rudder to push the bow off to one side. In Irons: What It Means and How to Escape →

  • Figure-Eight Knot

    A stopper knot tied in the end of a line to keep it from running out through a block or fairlead. How to Tie a Figure-Eight Stopper Knot →

  • Flaking

    Folding a lowered sail back and forth into neat panels along the boom so it stows flat instead of piling into a heap. How to Lower and Flake a Mainsail →

  • Furling

    Rolling a sail up around a stay or the mast, either to stow it or to reduce how much of it is exposed to the wind. How to Unfurl a Jib →

  • Heaving a Line

    Throwing a coiled line to someone on a dock or another boat, usually to pass a dock line across a gap of open water.

  • Heaving-To

    Setting the sails and rudder against each other so the boat stalls in a stable, slow-drifting position — a pause button used to rest, wait, or ride out weather. How to Heave To →

  • Hoisting

    Raising a sail up the mast using its halyard. How to Raise a Mainsail →

  • Jibing

    Turning the stern through the wind so the boat changes course with the wind crossing behind it — the boom can swing across quickly, so this turn is controlled deliberately. Also spelled "gybing." How to Jibe a Sailboat →

  • Man Overboard (MOB)

    A crew member who has gone into the water. The term also names the recovery drill: shout the alarm, point continuously, stop the boat, and bring the person back aboard. Man Overboard: The First Ten Seconds →

  • Picking Up a Mooring

    Approaching a mooring buoy under sail or power and securing the boat's own line to its pendant, rather than dropping an anchor. How to Pick Up a Mooring Ball →

  • Preventer

    A line rigged from the boom forward to hold it from swinging across accidentally, especially useful running downwind. How to Rig and Use a Preventer →

  • Prop Walk

    A propeller's tendency to pull the stern sideways as well as push the boat forward or back, most noticeable in reverse at low speed. Prop Walk: Why Your Stern Kicks Sideways →

  • Quick-Stop Method

    A crew-overboard recovery pattern that turns the boat back toward the person in the water immediately, without first sailing away to build room to maneuver. Man Overboard: Turning Back and Getting Them Aboard →

  • Rafting Up

    Tying one boat alongside another that's already secured to a dock or anchor, rather than finding a separate space.

  • Reef Knot

    A knot for joining two ends of the same line, such as the reef points on a sail — not reliable for joining two separate lines of different sizes. Reef Knot vs Sheet Bend →

  • Setting an Anchor

    Lowering the anchor, letting out enough rode, and reversing gently to dig it into the bottom so it holds under load. Anchor Scope Explained →

  • Sheet Bend

    A knot for joining two separate lines together, including lines of different thicknesses, more securely than a reef knot manages that job. Reef Knot vs Sheet Bend →

  • Springing Off

    Using a spring line and the engine, rather than just pushing off by hand, to pivot the bow or stern away from a dock in a controlled way. How to Leave a Dock Under Power →

  • Tacking

    Turning the bow through the wind so the boat changes from one close-hauled course to the opposite one, with the wind briefly crossing the bow. How to Tack a Sailboat →

  • Unfurling

    Unrolling a furled sail back out so it can catch wind again. How to Unfurl a Jib →

  • Weighing Anchor

    Raising the anchor back aboard to get underway, the opposite of setting it. How to Weigh Anchor →

  • Wing-on-Wing

    Sailing dead downwind with the mainsail out on one side and the jib poled or held out on the opposite side. How to Sail Wing-on-Wing →

Anchoring & Mooring

  • Anchor

    The weighted device dropped to the bottom and dug in to hold a boat in place, connected to the boat by its rode. Boat Anchor Types Explained →

  • Anchor Chain

    Chain used as some or all of the rode, adding weight that helps the anchor pull along the bottom rather than up, and resisting chafe better than rope. Anchor Chain vs Rope Rode →

  • Anchor Watch

    Checking, or having an alarm check, that the boat's position hasn't shifted beyond a set distance from where the anchor was set. How to Set an Anchor Alarm →

  • Anchorage

    An area of water suitable and customarily used for anchoring, sheltered enough and with a bottom that holds an anchor well. How to Choose an Anchorage →

  • Bridle

    A Y-shaped snubber arrangement running to both sides of the bow, which also helps keep the boat's bow pointed steadily into the wind or current. Anchor Snubber vs Bridle →

  • Dock Line

    Any of the lines used to secure a boat to a dock, typically named for their role: bow, stern, and spring lines.

  • Dragging Anchor

    The anchor sliding across the bottom instead of holding, letting the boat drift from where it was set. Dragging Anchor: How to Tell and What to Do →

  • Fender

    A padded bumper hung over the side to cushion the hull against a dock, piling, or another boat. How to Position Fenders When Docking →

  • Ground Tackle

    The complete anchoring set aboard — the anchor itself, its chain and rode, and the fittings that connect them.

  • Marina Slip

    An assigned berth for a boat within a marina, usually with a fixed dock or finger pier on at least one side. Marina Slip vs Mooring vs Dry Storage →

  • Mooring Ball

    A permanently anchored floating buoy a boat ties to instead of dropping its own anchor, usually in a managed mooring field. How to Pick Up a Mooring Ball →

  • Mooring Pendant

    The short line or loop hanging from a mooring ball that a boat's own line is passed through and secured to.

  • Rode

    The line, chain, or combination of both connecting the anchor to the boat. Anchor Chain vs Rope Rode →

  • Scope

    The ratio of rode let out to the water's depth plus the height of the bow above the water — more scope generally means a flatter pull and a better-holding anchor. Anchor Scope Explained →

  • Snubber

    A short, stretchy line attached between the boat and the anchor chain that absorbs shock loads, taking the jerking strain off the windlass. Anchor Snubber vs Bridle →

  • Spring Line

    A dock line run diagonally, forward or aft, that stops a boat from moving lengthwise along the dock even while other lines hold it close. Spring Lines Explained →

  • Windlass

    A powered winch mounted at the bow that raises and lowers the anchor rode, replacing hauling it up by hand. Sailboat Windlass Operation and Troubleshooting →

Weather

  • Barometric Pressure

    Atmospheric pressure as read by a barometer; a falling trend often signals approaching unsettled weather.

  • Beaufort Scale

    A scale from 0 to 12 that describes wind strength by its effect on water and sails, from calm to hurricane force. The Beaufort Scale for Sailors →

  • Cold Shock

    The body's involuntary gasp and rapid breathing response to sudden immersion in cold water, dangerous because it can cause someone to inhale water in the first moments. Cold Water Shock: What to Do →

  • Fetch

    The open-water distance wind blows over before reaching a given point; longer fetch builds bigger waves for the same wind speed.

  • Fog

    Cloud at sea level that cuts visibility, requiring slower speed, sound signals, and extra care keeping a lookout. Sailing in Fog →

  • GRIB File

    A compact weather-model data file, showing forecast wind, pressure, and waves over a map, that many boat navigation apps can display and download offline. GRIB Files vs Marine Forecasts →

  • Land Breeze

    A local wind blowing from land toward the water, usually overnight, the mirror image of a daytime sea breeze. Land Breeze vs Sea Breeze →

  • Lee Shore

    A shoreline the wind is blowing toward, which pushes a boat with engine or steering trouble onto it rather than away from it. What Is a Lee Shore? →

  • Sea Breeze

    A local wind that develops on sunny days as warm air rises over land and cooler air is drawn in from the water to replace it, typically strengthening through the afternoon. What Causes a Sea Breeze? →

  • Small Craft Advisory

    A forecast alert warning that conditions may be hazardous for smaller recreational boats — the exact wind and wave thresholds that trigger one vary by issuing authority, so check the specific criteria used where you sail.

  • Squall

    A short, intense burst of strong wind, often with rain, that arrives quickly and passes within an hour or so. Sailing in a Squall →

  • Swell

    Regular, rolling waves that traveled from wind blowing somewhere else, distinct from the choppier local wind waves raised by wind blowing right where you are. How to Read Wave and Swell Forecasts →

  • Thunderstorm

    A storm producing lightning and thunder, along with gusty wind and heavy rain, generally best avoided or waited out rather than sailed through. Thunderstorm Avoidance for Sailboats →

  • Weather Front

    The boundary between two air masses of different temperature or humidity, often bringing a wind shift and a change in weather as it passes.

  • Wind Shift

    A change in the true wind's direction, which can turn a comfortable point of sail into a close-hauled beat or vice versa. Gust Fronts and Sudden Wind Shifts →

Charter & Ownership

  • Bareboat Charter

    Renting a sailboat without a hired skipper or crew — you and your own crew are responsible for sailing it, usually after showing relevant experience. Bareboat vs Skippered Charter →

  • Boat Financing

    A loan taken out to buy a boat, similar in structure to a vehicle loan but often with different lenders and terms. Sailboat Financing and Boat Loans Explained →

  • Charter Damage Waiver

    An optional charter add-on that caps how much of any repair cost you'd owe if the boat is damaged, in exchange for a fee.

  • Crew List

    The document listing everyone sailing aboard, often required by the charter company or local authority before departure.

  • Crew Safety Briefing

    The short talk a skipper gives before every sail covering the emergency plan, gear locations, and how to call for help, so the whole crew shares the same basic picture. The Crew Safety Briefing →

  • Displacement Hull

    A hull shape, standard on sailboats, that pushes through the water rather than rising up to plane across its surface, which caps its practical top speed.

  • Float Plan

    A written note of your route, timing, and crew left with someone ashore before you go out, so help can be directed correctly if you don't return as expected. Float Plan for Sailors →

  • Flotilla Sailing

    A group of bareboat-chartered boats sailing the same route together, usually with a lead boat and crew offering guidance and support along the way. Flotilla Sailing vs Bareboat Charter →

  • Handover

    The charter check-in process where the provider walks you through the boat's condition, systems, and inventory before you take it out. Sailboat Charter Check-In and Checkout →

  • Haul-Out

    Lifting a boat out of the water, usually for bottom painting, repairs, or winter storage. Sailboat Haul-Out Costs and Planning →

  • Holding Tank

    The tank that stores waste from the head until it can be pumped out ashore or, where local rules allow, offshore. Sailboat Plumbing and Holding Tank System →

  • Liveaboard

    Someone who lives full-time aboard their boat rather than in a house or apartment on land. Living on a Sailboat Full Time →

  • Marine Survey

    A professional inspection of a boat's hull, systems, and structure, typically done before a purchase or for insurance. Marine Survey Cost and Process →

  • Operating Area

    The geographic boundary a charter contract sets for where the boat may sail, usually chosen for weather, distance, and rescue-response reasons.

  • Osmotic Blister

    A bubble that forms under a fiberglass hull's gelcoat when water slowly works its way into the laminate, a cosmetic and sometimes structural issue on older boats. Osmotic Blisters on Sailboats →

  • Provisioning

    Buying and loading the food, drink, and supplies for a sailing trip, either yourself or through a charter base's provisioning service. Sailboat Provisioning Checklist →

  • Refit

    A project that upgrades or replaces a boat's systems and equipment, ranging from a single system swap to a full rebuild. How to Prioritize a Sailboat Refit →

  • Sacrificial Anode

    A block of soft metal attached to underwater metal fittings that corrodes first, protecting the boat's more expensive metal parts from electrolytic corrosion. Sacrificial Anodes on Sailboats →

  • Sailing Certification

    A credential from a sailing school or association, such as ASA in the US or RYA in the UK, showing a sailor has completed specific coursework — different bareboat charter operators around the world accept different credentials, so verify current requirements with the operator before you book. ASA vs RYA Sailing Courses →

  • Sea Trial

    A test sail of a boat under consideration for purchase, used to check how it handles and whether its systems work before committing to buy. Sailboat Sea Trial Checklist for Buyers →

  • Security Deposit

    A refundable amount held by the charter company during the trip, released after checkout once the boat's condition and fuel are confirmed against the handover record. Charter Cancellation and Security Deposits →

  • Shore Power

    Electrical power supplied from a dock's outlet through a cord, used to charge batteries and run onboard systems without the engine running. Sailboat Shore Power Basics →

  • Skippered Charter

    Renting a sailboat together with a professional skipper who does the sailing, or oversees it, on your behalf. Bareboat vs Skippered Charter →

  • Trailer Sailer

    A small sailboat, often with a retractable keel or centerboard, light enough to tow behind a vehicle and launch from a ramp. Trailer Sailer Guide →

  • Yacht Club

    A membership club organized around sailing and boating, often offering moorings, racing, social events, and reciprocal privileges at other clubs. What Is a Yacht Club? →

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