Glossary
For the confused (& there are alot of us out there!) Here's what all that sailing gobbledegook means:
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
A
ABAFT
Toward the rear (stern) of the boat. Behind
ABEAM
At right angles to the keel of the boat, but not on the boat
ABOARD
On or within the boat
ABOVE DECK
On the deck (not over it – see ALOFT)
ABREAST
Side by side; by the side of
ADRIFT
Loose, not on moorings or towline
AFT
Toward the stern of the boat
AGROUND
Touching or fast to the bottom
AHEAD
In a forward direction
AIDS TO NAVIGATION
Artificial objects to supplement natural landmarks indicating safe and unsafe waters
ALEE
Away from the direction of the wind. Opposite of windward
ALOFT
Above the deck of the boat
AMIDSHIPS
In or toward the centre of the boat
ANCHORAGE
A place suitable for anchoring in relation to the wind, seas and bottom
ASCENDER
The ascender is used to safely climb up the mast.
ASTERN
Back of the boat, opposite of ahead
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B
BACKSTAY
A line or cable used to support the mast. The backstay runs from the masthead to the stern and helps keep the mast from falling forward
BATTEN DOWN
Secure hatches and loose objects both within the hull and on deck
BEAM
The greatest width of the boat
BEAM REACH
Point of sail with the wind coming from abeam
BEAM SEAS
Direction of the sea is at right angles to the keel of the boat (abeam). Large beam seas can result in an uncomfortable rocking motion as the sea meets the side of the boat
BEARING
The direction of an object expressed either as a true bearing as shown on the chart, or as a bearing relative to the heading of the boat
BEATING
To sail against the wind on alternate tacks
BELOW
Beneath the deck
BIGHT
The part of the rope or line, between the end and the standing part, on which a knot is formed
BILGE
The interior of the hull below the floor boards where water often collects
BOAT HOOK
A short shaft with a fitting at one end shaped to facilitate use in putting a line over a piling, recovering an object dropped overboard, or in pushing or fending off
BOOT TOP
A painted line that indicates the designed waterline
BOOM
Pole securing the bottom of a sail
BOW
The forward part of a boat
BOW LINE
A docking line leading from the bow
BOWLINE
A knot used to form a temporary loop in the end of a line
BOWSPRIT
A pole extending forward from the vessel's bow, allowing better positioning of the jib
BREAKING SEAS
Large waves form crests in high winds, even in deep water, resulting in the tops to tumble forward
BRIDLE
A line or wire secured at both ends in order to distribute a strain between two points
BULKHEAD
A vertical partition separating compartments
BUOY
An anchored float used for marking a position on the water or a hazard or a shoal and for mooring
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C
CABIN
A compartment for passengers or crew
CAPSIZE
To turn over
CAST OFF
To let go
CHAFING GEAR
Tubing or cloth wrapping used to protect a line from chafing on a rough surface
CHART
A map for use by navigators
CLEAT
A fitting to which lines are made fast
CLOVE HITCH
A knot for temporarily fastening a line to a spar or piling
COCKPIT
An opening in the deck from which the boat is handled
CODE O
A Code O is essentially a cross between a spinnaker and a genoa. A flat, heavyweight asymmetric reaching spinnaker designed to fly like a huge jib. It is effective at wind angles from 45 degrees in light airs and up to 100 degrees in heavier airs and is commonly used offshore or for distance sailing
COIL
To lay a line down in circular turns
COURSE
The direction in which a boat is steered
CURRENT
The horizontal movement of water
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D
DEAD AHEAD
Directly ahead
DEAD ASTERN
Directly aft
DECK
A permanent covering over a compartment, hull or any part thereof
DISPLACEMENT
The weight of water displaced by a floating vessel, thus, a boat's weight
DISPLACEMENT HULL
A type of hull that ploughs through the water, displacing a weight of water equal to its own weight, even when more power is added
DOCK
A protected water area in which vessels are moored
DOLDRUMS / ITCZ (Intertropical Convergence Zone)
An area of low-pressure between the northeast and southeast trade winds, which migrates with the seasons but is generally situated between 3 and 11° north. The windless void is caused by intense heating at the equator that makes the hot, volatile air rise. This band of light airs is interspersed with tropical storm cells as a result of the volatile air, so sailors can face the frustration of grinding to a complete halt, only to encounter sudden violent squalls producing rapid and dangerous changes in wind speed and direction.
DRAFT
The depth of water a boat draws
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E
EBB
A receding current
EQUATOR
An imaginary line round the centre of the earth at a latitude of 0°
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F
FATHOM
Six feet
FENDER
A cushion, placed between boats, or between a boat and a pier, to prevent damage
FIGURE EIGHT KNOT
A knot in the form of a figure eight, placed in the end of a line to prevent the line from passing through a grommet or a block
FLARE
The outward curve of a vessel's sides near the bow. A distress signal
FLOOD
An incoming current
FLYING FISH
There are 70 species of Exocoetidae or flying fishes. They are found in all the major oceans in warm tropical and sub-tropical waters. They have unusually large pectoral fins which allow them to take short flights out of the water to escape predators. Some species also have large pelvic fins, so they look like they have four wings.
Generally they grow up to 30cm in length but some can be as big as 45cm. They live near the surface and feed on plankton.
FOLLOWING SEA
An overtaking sea that comes from astern
FORE-AND-AFT
In a line parallel to the keel
FOREPEAK
A compartment in the bow
FORESAIL
A sail placed forward of the mast, a job for example
FORWARD
Toward the bow of the boat
FOULED
Any piece of equipment that is jammed or entangled, or dirtied
FREEBOARD
The minimum vertical distance from the surface of the water to the gunwale
FURL
To lower a sail. Sails are sometimes partially lowered to reduce sail area without removing sail completely. Usually called reefing
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G
GALE
Storm with wind speeds of approximately 34- 40 knots; force 8 on Beaufort Scale, described as producing moderately high waves with breaking crests, breaking twigs and causing cars to veer
GALLEY
The kitchen area
GANGWAY
The area of a ship's side where people board and disembark
GEAR
A general term for ropes, blocks, tackle and other equipment
GENOA
A large jib that overlaps the mast
GIVE-WAY VESSEL
A term used to describe the vessel which must yield in meeting, crossing, or overtaking situations
GPS
Abbreviation for Global Positioning System, a system of satellites allowing position to be accurately determined
GRAB RAILS
Hand-hold fittings mounted on cabin tops and sides for personal safety when moving around the boat
GREAT CIRCLE
A circle drawn around the Earth so that the centre of the circle is at the centre of the Earth, plotting the shortest distance between any two points
GRIGRI
A Grigri is a popular belay device used by climbers. It is a hand-sized device attached to the line which enables a safely controlled descent. An important characteristic of a Grigri is its self-locking behaviour under a shock load. So if you were to slip and suddenly fall towards the deck, the Grigri would lock in place and stop falling to a potential injury, much like a seat belt in a car reacts when a car stops suddenly.
GUNWALE
The upper edge of a boat's sides
GYBE
Changing the direction of the boat by turning the stern of the boat through the wind
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H
HALYARD
A line used to hoist a sail, the tightness of which effects the shape of the sail
HATCH
An opening in a boat's deck fitted with a watertight cover
HEAD
A marine toilet. Also the upper corner of a triangular sail
HEADING
The direction in which a vessel's bow points at any given time
HEADSTAY
The most forward forestay – the line from the bow or bowsprit to the mast
HEADWAY
The forward motion of a boat. Opposite of sternway
HELM
The wheel or tiller controlling the rudder
HELMSPERSON
The person who steers the boat
HITCH
A knot used to secure a rope to another object or to another rope, or to form a loop or a noose in a rope
HOLD
A compartment below deck in a large vessel, used solely for carrying cargo
HULL
The main body of a vessel
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I
INBOARD
More toward the centre of a vessel; inside; a motor fitted inside a boat
INMARSAT-C
A system of satellites that allow two way communications
ITCZ / DOLDRUMS (Intertropical Convergence Zone)
An area of low-pressure between the northeast and southeast trade winds, which migrates with the seasons but is generally situated between 3 and 11° north. The windless void is caused by intense heating at the equator that makes the hot, volatile air rise. This band of light airs is interspersed with tropical storm cells as a result of the volatile air, so sailors can face the frustration of grinding to a complete halt, only to encounter sudden violent squalls producing rapid and dangerous changes in wind speed and direction.
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J
JACOBS LADDER
A rope ladder, lowered from the deck, as when pilots or passengers come aboard
JIB
A triangular sail attached to the headstay
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K
KEEL
The centreline of a boat running fore and aft; the backbone of a vessel
KNOT
A measure of speed equal to one nautical mile (6076 feet) per hour
KNOT
A fastening made by interweaving rope to form a stopper, to enclose or bind an object, to form a loop or a noose, to tie a small rope to an object, or to tie the ends of two small ropes together
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L
LATITUDE
The distance north or south of the equator measured and expressed in degrees
LAZARETTE
A storage space in a boat's stern area
LAZY JACK
A line running from the mast to the boom to aid lowering of the sail
LEE
The side sheltered from the wind
LEEWARD
The direction away from the wind. Opposite of windward
LEEWAY
The sideways movement of the boat caused by either wind or current
LINE
Rope and cordage used aboard a vessel
LOG
A record of courses or operation. Also, a device to measure speed
LONGITUDE
The distance in degrees east or west of the meridian at Greenwich, England
LUBBER'S LINE
A mark or permanent line on a compass indicating the direction forward parallel to the keel when properly installed
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M
MAIN SHEET
Line used to control the main sail
MARLINSPIKE
A tool for opening the strands of a rope while splicing
MIDSHIP
Approximately in the location equally distant from the bow and stern
MOORING
An arrangement for securing a boat to a mooring buoy or a pier
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N
NAUTICAL MILE
One minute of latitude, approximately 6076 feet – about 1/8 longer than the statute mile of 5280 feet
NAVIGATION
The art and science of conducting a boat safely from one point to another
NAVIGATION RULES
The regulations governing the movement of vessels in relation to each other, generally called steering and sailing rules
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O
OUTBOARD
Toward or beyond the boat's sides. A detachable engine mounted on a boat's stern
OVERBOARD
Over the side or out of the boat
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P
PILOTING
Navigation by use of visible references, the depth of the water, etc
PLANING
A boat is said to be planing when it is essentially moving over the top of the water rather than through the water
PORT
The left side of a boat looking forward. A harbour
PRIVILEGED VESSEL
A vessel that, according to the applicable Navigation Rule, has right-of-way (this term has been superseded by the term "stand-on")
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Q
QUARTER
The sides of a boat aft of amidships
QUARTERING SEA
Sea coming on a boat's quarter
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R
RADAR
Electronic device using radio waves to determine the position of other objects, used to avoid collisions
REEFING
As wind speed increases the yacht becomes overpowered and heels over (leans) too much. This not only slows the yacht down but also makes the sails vulnerable to damage. To maintain the right power for the prevailing conditions, the sails are reefed, which means to reduce their area by partially lowering or furling them to a pre-determined mark.
RIGGING
Lines, halyards or other items used to attach sails. Those adjusted to raise, lower or trim sails are known as running rigging; those not adjusted known as standing rigging
ROARING FORTIES
A region between 40° South and 50° South where westerly winds circle the earth unobstructed by land
RODE
The anchor line and/or chain
ROPE
In general, cordage as it is purchased at the store
RUDDER
A vertical plate or board for steering a boat
RUN
To allow a line to feed freely
RUNNING BACKSTAY
Adjustable stay used to control tension on the mast
RUNNING LIGHTS
Lights required to be shown on boats underway between sundown and dawn
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S
SATELLITE NAVIGATION
A form of position finding using radio transmissions from satellites with sophisticated on-board automatic equipment
SCREW
A boat's propeller
SCUPPERS
Drain holes on deck, in the toe rail, or in bulwarks or (with drain pipes) in the deck itself
SEA COCK
A through hull valve, a shut off on a plumbing or drain pipe between the vessel's interior and the sea
SEAMANSHIP
All the arts and skills of boat handling, ranging from maintenance and repairs to piloting, sail handling, marlinespike work, and rigging
SEA ROOM
A safe distance from the shore or other hazards
SEAWORTHY
A boat or a boat's gear able to meet sea conditions
SECURE
To make fast
SET
Direction toward which the current is flowing
SHROUD
Part of the standing rigging that supports the mast, running from the top of the mast to the side of the boat
SOUNDING
A measurement of the depth of water
SPREADERS
Spars extending sideways from the mast allowing the shrouds to support the mast
SPRING LINE
A pivot line used in docking, undocking, or to prevent the boat from moving forward or astern while made fast to a dock
SQUALL
A sudden, violent wind often accompanied by rain
SQUARE KNOT
A knot used to join two lines of similar size. Also called a reef knot
STANCHION
Post near the edge of the deck supporting lifeline, which extends from bow to stern to prevent crew being separated from boat
STANDING PART
That part of a line which is made fast. The main part of a line as distinguished from the bight and the end
STAND-ON VESSEL
That vessel which has right-of-way during a meeting, crossing, or overtaking situation
STARBOARD
The right side of a boat when looking forward
STAY
Lines running fore and aft of the mast for support, also used to carry some sails
STAYSAIL
Triangular sail positioned forward of the mast but aft of the headstay
STEM
The forward most part of the bow
STERN
The aft part of the boat
STERN LINE
A docking line leading from the stern
STOW
To put an item in its proper place
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T
TACK
The lower forward corner of a triangular sail; the direction the boat is sailing in relation to the wind; change a boat's direction by turning the bow of the boat through the wind
THWARTSHIPS
At right angles to the centreline of the boat
TIDE
The periodic rise and fall of water level in the oceans
TILLER
A bar or handle for turning a boat's rudder or an outboard motor
TOPSIDES
The sides of a vessel between the waterline and the deck; sometimes referring to onto or above the deck
TRADE WIND
Consistent, reliable winds found in the equatorial region
TRANSOM
The stern cross-section of a square sterned boat
TRIM
Fore and aft balance of a boat enabling efficient airflow through the sails and directly effecting performance
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U
UNDERWAY
Vessel in motion, i.e., when not moored, at anchor, or aground
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V
VEER
Change of wind direction, clockwise in the northern hemisphere, anti-clockwise in the Southern Hemisphere
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W
WAKE
Moving waves, track or path that a boat leaves behind it, when moving across the waters
WATERLINE
A line painted on a hull which shows the point to which a boat sinks when it is properly trimmed
WAY
Movement of a vessel through the water such as headway, sternway or leeway
WINDWARD
Toward the direction from which the wind is coming, opposite of leeward
X
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Y
YAW
To swing or steer off course, as when running with a quartering sea
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