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Beam Reach 
To force air and oxygen into livewells to keep fish or bait alive.  To force air under the running surface of a hull.

The rear of the boat.

Aft cabin:
Sleeping quarters beneath the aft or rear section of the boat (sometimes called a mid cabin when located beneath the helm).

The side of a boat or object away from the direction of the wind.

Above deck in the rigging.

Aluminium fish boat:
Small, lightweight, durable trailer boat constructed of aluminums that is either welded or riveted; generally used for freshwater fishing.

Center section of a boat.

A continuous range of numbers or values.

A location intended or suited for anchoring.

Anti-fouling paint:
A special paint applied to a boat's hull to prevent marine growth.

Apparent wind:
The direction and velocity of wind as felt in a moving boat.

The direction toward or beyond the stern.

Perpendicular to a boat's centerline.

Atmospheric pressure:
Pressure exerted by the atmosphere at any specific location.  (Sea level pressure is approximately 14.7 pounds per square inch absolute.)

An anchor that is off the bottom.

A support for the mast to keep it from falling forward.

To remove water with a bucket or pump. Also, a component that controls fishing line on a spinning reel.

Bait station:
Area on a fishing boat for preparing bait.

Bait well :
Compartment on a fishing boat for holding live bait, usually with a pump to circulate the water and an aerator to provide oxygen.

Weight added to the bottom of a boat to improve stability.

Bass boat:
Low-profile, outboard-powered boat, generally no more than 22 feet long and typically equipped with rod lockers, casting decks with pedestal seats and livewells.

Measurement of a boat at its widest point.

Direction to an object.

A part on which the arbor, pivot, pin, or the like, turns or revolves.

Bear off :
To turn away from the wind.

Sailing upwind.

Part of the conveyor on which pieces of wood are displaced.

A place to sleep aboard a boat. Also, a boat slip.

Lowest section inside a boat's hull where water collects.

Bimini top:
A canvas cover over the helm or cockpit area.

A spar attached to a sail at its foot.

Forward portion of a boat.

Bow eye:
A stainless steel U-bolt on a boat's bow stem used to secure tow lines or trailer winch hooks

A runabout boat with open-bow seating.

A spar extending forward of the bow on a sailboat.

Bow stop:
Rubber blocks on a boat trailer into which the boat's stem rests.

Breakaway lanyard:
Emergency safety cable on a boat trailer that activates trailer brakes in the event the trailer comes detached from the tow vehicle while underway.

Bridge clearance:
Distance from waterline to a boat's highest point.

Transverse wall in a boat that usually bears weight and supplies hull support.

Long carpeted sections of a boat trailer that support the boat's weight.

An anchored floating object that serves as a navigation aid. Also used to mark a mooring spot.

Curvature of a sail.

Can buoy:
Cylindrical navigation buoy with a flat top, generally green in color.

To flip a boat over.

A winch used for hauling heavy objects such as anchors.

Casting platform:
Elevated deck clear of obstruction used by anglers to make casts, often equipped with pedestal chairs.

Cast off:
To unfasten all lines in preparation for departure.

A twin hulled boat, either power or sail.

Catboat :
Small, simple sailboat with one mast and sail set far forward.

A localized gaseous condition within a liquid stream which occurs where the pressure is reduced to the vapor pressure.

Celsius (C):
The international temperature scale in which water freezes at 0 and boils at 100 under normal atmospheric conditions.   °C = (°F - 32) ÷ 1.8.

A keel-like pivoting device, typically in a trunk, that can be lowered or raised to act as a keel.

Center console boat:
Fishing boat with the helm station located amidships for maximum walk-through space around the perimeter of the boat.

Centimetre (cm):
A metric unit of length equal to one hundredth of a metre.  2.54 cm is equal to one inch.

Centrifugal force:
The force which impels a thing, or parts of a thing, outward from a center of rotation.

A fluid passage, the length of which is large with respect to its cross-sectional dimension.

Chart plotter:
Electronic navigation device that displays charts for use in plotting a course.

Chart recorder:
An electronic depth sounder that records bottom structure data on paper.

Paper or electronic navigation maps.

Chine :
Portion of the hull where the bottom and sides intersect.

Chopped fibreglass:
Fibreglass strands cut and mixed with resin by and applied to a boat mold by using a chopper gun.

Class I hitch :
Trailer hitch with a weight-carrying capacity up to 2,000 pounds; available as a bumper mount, step bumper or bumper/frame mount.

Class II hitch :
Frame-mounted trailer hitch with a weight-carrying capacity of up to 3,500 pounds.

Class III hitch :
Frame-mounted trailer hitch with a weight-carrying capacity of up to 5,000 pounds.

Class IV hitch :
Frame-mounted trailer hitch with a weight-carrying capacity of up to 10,000 pounds.

Cleat :
Hardware piece on a boat or a dock to which lines are attached.

Clew :
The after-most corner of a sail.

Close-hauled :
Sailing as close to the wind or directly into the wind as possible.

Cockpit :
Deck space for the crew of a boat, typically recessed.

Come about :
To tack or change heading relative to the wind.

Counter rotation:
The act of two propellers spinning in opposite directions on a single shaft.

Course :
Direction in which a boat is steered.

Cruiser :
A boat with overnight accommodations.

Cuddy cabin :
Below decks accommodations in the bow area for over nighting and stowage.

Cure :
Hardening process for resin-soaked fibreglass laminates.

Cutter :
Single-masted sailboat similar to a sloop, but with the mast farther aft to allow for a double headsail.

Dagger board :
A keel-like device that is manually raised and lowered vertically without using a hinge.

Dead ahead:
Directly ahead of the bow.

Dead rise:
Degrees of V-shape hull angle measured at the transom of planing powerboats.

Deck boat :
Blunt-bowed power boat generally characterized by an open deck and generous passenger

Deep-V :
A hull shape characterized by a sharp dead rise, typically more than 20 degrees.

The amount of change in a number, size or position.

Depth sounder :
Electronic sonar device that displays water depth.

Deviation :
The amount of error from displaying magnetic north in a boat's compass caused by the boat's own magnetic interference.

Dinghy :
A small sailboat often raced that can be sailed on and off a beach. Also a tender, either rowed or equipped with power, used to go to and from a larger vessel.

Direct drive :
An engine configuration in which the drive shaft runs in a straight driveline through the bottom of the hull.

The quantity of fluid which can pass through a pump, motor or cylinder in a single revolution or stroke.

Displacement :
The weight of water displaced by a hull. Also, a type of hull that smoothly displaces water as opposed to riding on top of it.

Displacement hull :
A hull shape designed to run through water rather than on top of it in the manner of a planing hull.

Downrigger :
A gunwale-mounted weighted line device used for deep-water trolling.

Draft :
Vertical distance a boat penetrates the water.

A parachute-like sea anchor.

Dry weight :
Weight of the boat without fuel and fresh water.

Dual-console boat :
A type of boat with twin dashboards separated by a centerline walk-through deck leading to the bow.

Fahrenheit (F):
The temperature scale in which water freezes at 32 degrees F and boils at 212 degrees F under normal atmospheric conditions.  F = (C x 1.8) + 32.

Fan pitch:
The angle of the fan blades measured one-third of the fan radius in from the tip.

Fans, variable-speed:
Fans whose motors turn at infinitely variable speeds by varying the line frequency of the power source.

Fathom :
Nautical depth measurement equalling six feet.

Fender :
A cylindrical or round cushion used to protect the hull sides of a boat, typically used when tied up at dock.

Fetch :
To clear a buoy, point of land or object without having to make a tack.

Fibreglass :
Glass fibres either loose or woven, reinforced with resin and used in the construction of many boats.

Fin keel :
A keel shaped like the fin of a fish that is shorter and deeper than a full-length keel.

Fish finder :
Electronic device that uses sonar to locate and display fish on a monitor.

Fix :
The position of a boat recorded in coordinates or bearings.

Flare :
A pyrotechnic device used to indicate distress. Also, the outward curvature of the sides on the bow of a boat.

Flat-bottom boat :
Type of boat or hull shape with very little or no dead rise.

Flats boat :
Type of small, inshore saltwater fishing boat with moderate dead rise and draft, usually equipped with a raised platform aft used by a guide pushing a long pole to silently manoeuvre the boat through shallow tidal water.

Flying bridge :
Raised, second-story helm station, often located above the primary helm.

Following sea :
Wave pattern running in the same direction as the boat.

Foot :
The bottom edge of a sail.

Foot (ft):
A linear unit of length equal to 12 inches or a third of a yard (0.3048 m).

Fore :
Located at the front of a boat.

Foredeck :
Forward part of the main deck, ahead of the superstructure.

Founder :
To sink.

Four-cycle engine:
A gasoline- or diesel-powered internal combustion engine that takes four cycles or strokes of the piston to complete its power phase. Also called four-stroke engine.

Freeboard :
Vertical distance between the waterline and the top of the hull side.

Rolling or folding a sail on its boom.

A metal pole with a hooked end used to boat a fish. Also a pole or spar that holds the upper portion of a four-sided sail.

Galley :
The kitchen area on a boat.

Gallon (gal):
A unit of volume.  A US gallon is equal to 4 quarts or 231 cubic inches (approximately 3.79 liters).  A British imperial gallon is equal to four quarts or 4.55 liters.

Gauge pressure:
A pressure scale which ignores atmospheric pressure.  Its zero point is 14.7 psi absolute.

Gelcoat :
A combination of resin and pigment that comprises the smooth outside coating of a fibreglass boat.

Genoa :
An overlapping jib.

Genset :
Another name for a gas- or diesel-powered electric generator.

Gigawatt (GW):
A measure of electrical power equal to one billion watts (1,000,000 kW).

Acronym for global positioning system, a satellite-based navigation system that uses transmitted signals and mathematical triangulation to pinpoint location.

Gram (g):
A metric unit of weight equal to one thousandth of a kilogram; one ounce is approximately 28 grams.

Gross axle weight rating (GAWR) :
The maximum weight an axle is designed to carry.

Gross combined weight rating (GCWR) :
The maximum allowable weight of a fully loaded tow vehicle plus its fully loaded trailer, including passengers and cargo.

Gross trailer weight rating (GTWR) :
The maximum allowable weight of trailer and its cargo.

Gross vehicle weight rating (GVWR) :
The maximum allowable weight of a fully equipped tow vehicle including passengers and cargo.

The upper edge of the side of a boat

Gybe :
Also spelled jibe. To change the course of a boat so that the boom swings over to the opposite side.

Halyard :
Line used to hoist a spar or sail.

Harbour master :
The person at a harbour in charge of anchorages, berths and harbour traffic.

Hard chine :
A sharp-angle at the intersection of the hull's side and bottom.

Hatch :
A deck opening.

Hawse pipe :
Fittings in the deck or gunwale through which the anchor rode or dock lines run.

Head :
Toilet facilities or room where they are located.

Heading :
The direction a boat is pointed.

Headsail :
Any sail set forward of the mast.

Head Up:
To sail closer to the wind.

Headway :
Forward motion of a boat in the water.

Heave :
To pull on a line. Also to throw a line.

Heaving to :
Setting the sails so the boat makes little headway, either used in a storm or a waiting situation.

Heel :
To temporarily tip or lean to one side.

Helm :
Area of a boat where operational controls are located.

Hike :
To lean out on the windward side of a sailboat to achieve optimal speed by offsetting heeling.

Holding tank :
Storage tank for waste water.

Houseboat :
A large, flat-bottom boat with square sides and house-like characteristics, such as comfortable furniture and living accommodations.

Hull :
The structural body of the boat that rests in the water.

Inboard engine :
An internal combustion engine often mounted amidships that runs a drive shaft through the hull bottom.

Inboard/outboard (I/O) :
Propulsion system composed of an inboard engine connected to a steerable drive unit extending through a cut-out in the transom.

Inch (in):
A unit of length equal to one-twelfth of a foot (2.54 cm).

Inflatable boat :
A type of boat with air chambers into which air is pumped either manually or automatically for buoyancy, some having rigid bottoms.

In Irons:
Headed directly into the wind with no headway; the boat cannot be trimmed to fill on either tack. Also, "in stays".

Inner liner :
Smooth-finished, molded fibreglass structure adjacent to the inside portion of the hull.

Inverter :
Device that changes 12-, 24- or 32-volt direct current (DC) from a battery to 120-volt alternating current (AC).

Jack plate :
A mounting device for an outboard motor that enables operators to vertically raise or lower the motor, thereby controlling propeller depth in the water.

Jet boat :
A boat powered by an engine with a water-pump used to create propulsion.

Jib :
Triangular sail projecting ahead of the mast.

Jibe :
Also spelled gybe. To change the course of a boat so that the boom swings over to the opposite side.

Jon boat:
A jon boat (or johnboat) is a flat-bottomed boat constructed of aluminum, fiberglass, or wood with one, two, or three bench seats. They are suitable for fishing and hunting.

Joule (J):
1.  A unit of energy equal to the work done when a force of one newton acts through a distance
     of one metre.  One joule is equivalent to one watt second or 0.737 foot pounds.
2.  A unit of electrical energy equal to the work done when a current of one ampere is passed
     through a resistance of one ohm for one second.

The bottom-most portion or longitudinal centerline of a hull.

A sailboat similar in appearance to a yawl with a tall main mast and a shorter mizzen mast ahead of the rudder post.

Kicker motor:
A small auxiliary outboard motor.

Kill switch:
A switch with a lanyard that automatically shuts off an engine if disconnected.

Kilogram (kg):
The basic unit of mass in the SI system, equal to 1,000 grams (approximately 2.2 lbs).

Kilometre (km):
A measure of length equal to 1,000 metres or 0.62 miles.

Kilowatt hour (kWh):
A measure of energy equivalent to the expenditure of one kilowatt for one hour. For example, 1 kWh will light a 100-watt light bulb for 10 hours. 1 kWh = 3,413 Btu.

Kilowatt (kW):
A measure of electrical power equal to 1,000 watts. 1 kW = 3,413 Btu/hr = 1.341 horsepower.

Kinetic energy:
Energy that a substance or body has by virtue of its mass (weight) and velocity.

Kite fishing:
A technique that involves attaching a fishing line to a kite to present bait at a distance from the boat.

Speed measured in nautical miles per hour.

A product made by bonding together two or more layers (laminations) of material or materials.

Geographic distance north or south of the equator expressed in degrees and minutes.

Leaning post :
Wide, padded bolster at the helm used instead of or in lieu of conventional seats.

Lee :
Direction toward which the wind blows.

Lee side :
The side of an object that is sheltered from the wind.

To slip sideways downwind while moving forward.

Lifeline :
Safety lines on deck that are grabbed to prevent falling overboard.

List :
A continuous lean to one side due to improper weight distribution.

Liter (l):
Basic unit of volume in the metric system equal to 1,000 cubic centimetres (1.056 US quarts).

Livewell :
Compartment on a fishing boat designed to keep fish or bait alive.

Length overall; the distance between the most forward part of the boat and the most aft part.

Locker :
A stowage compartment, whether equipped with a lock or not.

Longitude :
Geographic distance east or west of the prime meridian expressed in degrees and minutes.

Loran C :
Electronic navigation system that measures the time difference in the reception of radio signals from land-based transmitters.

Luff :
The leading edge of a sail. Also means to alter course towards the wind; and to head so close to the wind that the sails flutter.

Mainsail :
The largest regular sail on a sailboat.

Make fast:
To secure a line.

Mast :
Vertical spar that supports sails.

A radio distress call.

Megawatt (MW):
A measure of electrical power equal to one million watts (1,000 kW).

Mega yacht:
A large, luxurious yacht, typically longer than 100 feet.

Metre (m):
The metric basic unit for linear measurement equal to 39.37 inches (1.094 yards).

One-millionth of a metre or approximately .00004 inch.

Micron rating:
The size of the particles a filter will remove.

Location near the center of a boat.

Mile (mi):
A unit of linear measurement on land, equivalent to 5,280 feet (1,760 yd) or 1.6 kilometres.

Millimetre (mm):
A unit of length equal to one thousandth of a metre (0.0394 inches).

Mizzen mast:
A shorter mast located aft of the main mast on a yawl or ketch.

Modified-V hull :
A modification of the deep-V hull shape with a deadrise of less than 20 degrees.

Mold :
A hollow reinforced cavity that is the mirror-image or reverse-image of the boat and into which fibreglass, gel coat and resin are laid during composite-hull construction.

A boat with a single hull.

Permanent ground tackle fixed to a buoy that boats can tie to.

A hybrid boat that has sails and powerful engines.

Motor yacht:
A large powerboat greater than 40 feet with luxurious interior accommodations for long-range cruising.

A boat with more than one hull, such as a catamaran or trimaran.

Nautical mile:
A distance of 6,076.12 feet or 1,852 meters, which is about 15 percent longer than a statute mile. Equivalent to one minute of latitude on a navigation chart.

Nun buoy:
Conical navigation buoy that is usually red.

Outboard motor:
Internal combustion engine mounted at the transom that incorporates motor, driveshaft and propeller.

The lower unit of a stern-drive motor that houses the drive gears and to which the propeller fastens.

Poles designed to spread out fishing lines and keep them from tangling while trolling.

Over the side of a boat and into the water.

Personal flotation device (PFD):
A safety vest or jacket capable of keeping an individual afloat.

Personal watercraft (PWC) :
A small, lightweight craft designed to be either sat-on or stood-on with motorcycle-like handlebars and squeeze throttle, usually jet-propelled.

Piling :
A post driven into the ground below the waterline to support a pier, dock, etc.

Pilot house:
A fully enclosed helm compartment.

To sail too close to the wind.

Theoretical distance a propeller would travel in one revolution. Also, the rise and fall of a boat's bow and stern.

Planing hull:
A boat hull designed to ride on top of the water rather than plowing through it.

Pleasure boating:
Recreational day boating in runabouts, deck boats, pontoon boats, bowriders and sportboats.

To plan a navigation course using a chart.

Poling platform:
Small elevated stand on a flats boat used by a fisherman to silently pole through shallow water and scout for fish.

Pontoon boat:
A type of boat with a flat deck attached to airtight flotation tubes or logs.

An internal or external terminus of a passage in a component.

Power catamaran:
A multi-hulled powerboat with two identical side-by-side hulls.

Power cruiser:
A powerboat with overnight accommodations, typically up to 40 feet long.

A line run forward from the boom to a deck fitting to prevent accidental jibes.

A rotating multi-blade device that propels a boat through the water.

Forward deck and railing structure at the bow of a boat.

The practice of aiming the boat's bow at a 45-degree angle to oncoming waves.

Living and sleeping areas of a vessel.

A sailboat designed primarily for speed and competition with a minimum of built-in creature comforts.

Racer / cruiser:
A fast sailboat designed with comfortable accommodations.

Electronic device using high frequency radio waves to detect objects and display their positions on a monitor.

Range :
Distance a boat can travel at cruising speed on a tank of fuel. Also, the distance to an object. Lastly, in intra coastal navigation, a set of two markers that, when lined up one behind the other, indicate the deepest part of the channel.

To sail across the wind. A point of sail between close-hauled and a run.

Ready about:
Last warning given by a helmsman before tacking and turning the bow into the wind, notifying the crew that the boom and sail will cross the boat.

Receiver box:
Part of a hitch that receives and holds the hitch bar or shank.

Receiver hitch:
A hitch with a receiver from which a hitch bar or shank can be removed.

An ingredient of coatings which acts as a binder and gives the coating physical properties such as hardness and durability.

Reverse chine :
A chine that angles downward from the hull designed to direct spray out and away from the boat.

RIB (rigid inflatable boat):
An inflatable boat fitted with a rigid bottom.

Wire cables, rods, lines, hardware and other equipment that support and control the mast and spars.

Line, chain, cable or any combination of these used to connect the anchor to the boat.

Rod holder:
Device designed to safely and securely hold fishing rods either vertically or horizontally.

Rolled-edge skiff:
A fishing boat designed to run in coastal waters constructed of a simple, one-piece fibreglass hull without a top deck and characterized by rounded top edges without true gunwales.

Roller trailer:
A trailer outfitted with rollers instead of bunks.

Revolutions per minute.

Protective outer bumper that runs around the boat at the point where the top deck meets the hull.

Underwater fin mounted below the hull near the stern that controls boat steering.

A kind of small, lightweight, freshwater pleasure craft intended for day use.

Point of sailing with the wind astern.

Running lights:
Required navigation lights that a vessel uses at night to indicate position and status.

Running rigging:
Lines used in the setting and trimming of sails.

Safety chains:
Legally mandated chains that connect the trailer to the tow vehicle as a safety measure in case the coupler detaches.

Safety harness:
A harness worn by a boater attached to the boat with a tether to reduce the chances of going overboard.

To slide or drift off course.

A boat that is at least partially propelled by capturing the force of wind in sails.

Sail plan:
Arrangement of sails on a boat.

Salon :
Full-sized, well-appointed cabin on the main deck level of a motor yacht, convertible or mega yacht used for entertaining.

Saltwater fishing boat:
Any fishing boat used in the ocean or coastal waters that's specially equipped to handle the harsh saltwater environment.

A large sailboat with two or more masts where the foremast is shorter than aft mainmast.

The ratio of anchor rode to vertical depth.

To run before the wind in bad weather.

Gravity fed drain in a boat to allow water to drain out and overboard.

To cut holes or open ports to purposely let water in to make a boat sink.

Gossip. So named after a water cask around which sailors used to gather and drink.

Sea anchor:
A canvas, cone-shaped device deployed to keep the bow headed into the wind to help safely ride out a storm. Also called a drogue.

Sea cock:
Through-hull fitting with a valve between the interior and the exterior of the boat.

Ability to handle rough weather. Also called sea-kindly.

Sedan cruiser:
A type of large boat equipped with a salon and a raised helm or bridge.

Selective availability :
Intentional degradation of GPS signal used for position fixing by the U.S. Department of Defence for purposes of national security. With selective availability turned on, positions can be fixed to about 300 meters. With selective availability turned off, positions can be fixed to about 100 meters

Drains water overboard automatically.

Semi-displacement hull:
A hull shape with soft chines or a rounded bottom that enables the boat to achieve minimal planing characteristics.

Line of the deck or gunwale from bow to stern as viewed from outside the boat.

Line used to trim a sail.

Mast support rigging, usually a wire, that runs from the mast to the side of the boat.

Side console:
A dash-panel unit affixed to the side of a boat. If only one, helm controls are affixed to it.

A fin or vertical projection below the hull that provides directional stability. Also, a fin-like projection at the bottom of an outboard.

A small, simple, shallow-draft boat.

Skiing / wakeboarding boat:
Low profile, pleasure boats with minimal deadrise specifically designed for waterskiing and/or wakeboarding. These boats are usually characterized by an inboard engine and a towing pylon. Wakeboard boats are often equipped with a tower or extremely tall pylon to fasten the tow line in a manner to aid vertical jumping and water-ballast devices to increase the weight of the boat.

A boat berth between two piers or floats. Also, the slight loss of efficient power delivery as a propeller spins in the water.

A single-masted sailboat in which the mast is set forward of midships.

The deck floor.

A method to locate objects and determine distance by transmitting sound waves through water and measuring the time it takes the echo to bounce back. Used in depth finders and fishfinders.

Charted water depth.

Masts, booms, gaffs and poles used in sailboat rigging.

Sportfish boat:
A type of bluewater fishing boat with at least two sleeping cabins and many dedicated fish-fighting features.

Spring line:
A docking line attached amidships to control fore and aft movement.

Stand by:
An order to crewmen to be ready, be prepared.

Standing rigging:
The shrouds and stays that support the mast but are not adjusted while working a boat.

Stand on:
Maintain course and speed.

The right side of the boat looking toward the bow.

A room with sleeping quarters, a cabin.

Statute mile:
Distance of 5,280 feet, the standard measure of distance on land and most inland waterways.

Wire, rod or other rigging that runs fore and aft of the mast.

The stalk of a plant.

Socket that holds the base of the mast.

Stepped hull:
A high-performance hull design with lateral notches, or steps, in the keel.

Aft portion of a boat.

Stern drive:
Propulsion system composed of an inboard engine connected to a steerable drive unit extending through a cut-out in the transom.

To put an object away onboard a boat, to store.

Small linear protrusions that run longitudinally on both sides of the keel to give a planing hull lift and lateral stability.

Internal beams and braces that give fibreglass hull structural support.

Surge brakes:
Hydraulic trailer brake system activated by the sudden inertia of a trailer pushing against the tow vehicle during a hard stop.

To fill a boat with water.

Side-to-side wandering of a trailer under tow.

Swim platform:
A wide platform at the transom equipped with a ladder to help ease the effort of reboarding after going into the water.

Tachometer (AC) (DC):
A device which generates an AC or DC signal proportional to the speed at which it is rotated and the polarity of which is dependent on the direction of rotation of the rotor.

Tack :
The lower corner of a sail. Also, each leg of a zigzag course.

A small sailboat often raced that can be sailed on and off a beach. Also a tender, either rowed or equipped with power, used to go to and from a larger vessel.

A fitting or object that goes all the way through a hull.

A bar connected to the rudder and used to steer the boat.

Tiller handle outboard:
A small, outboard motor that uses a handle fitted with engine controls to steer instead of a steering wheel.

Tongue jack:
Adjustable jack on the trailer tongue that raises and lowers the coupler.

Tongue weight:
The measurement of trailer weight when loaded with a boat on the hitch ball.

A unit of weight in the metric system equal to 1,000 kilograms or approximately 2,204 pounds.  Also called a Metric ton.

Ton (T):
1. US unit of weight equal to 2,000 lb; also called a Short ton.
2. British unit of weight equal to 2,240 lb (1,016 kg); also called a Long ton.

The hull above the waterline. Also, everything above deck as opposed to below deck.

A rotary thrust.  The turning effort of a fluid motor usually expressed in inch pounds.

Tow rating:
Maximum weight a vehicle is rated to tow.

Trailer tongue:
Forward portion of a trailer where the coupler is mounted.

Trailer winch:
Device that uses a crank and cable to assist in launching and retrieving a boat.

An electronic sensing device mounted in a boat's bilge or at the bottom of the transom to provide data for a depth sounder.

The rear section of the hull connecting the two sides.

Transom shower:
A plastic hose and shower head located near the transom that draws from a fresh water supply.

A pleasure boat more than 25 feet in length with a displacement hull.

The way a boat floats in relation to the horizon, bow up, bow down or even. Also, to adjust a boat's horizontal running angle by directing the outboard or stern drive's thrust up or down. Also, to set a sail in correct relation to the wind.

A type of boat with three side-by-side hulls, the center of which is usually larger with crew accommodations.

Trim tabs:
Hydraulically adjusted horizontal plates located on the bottom of the transom that control the trim angle of a boat at speed.

To fish by towing an array of baited lines or lures behind the boat.

True wind:
Direction and velocity of wind as measured on land, distinct from apparent wind.

Short, aluminium tower with overhead canvas to protect the helm.

Tuna tower:
Tall aluminium tower used for spotting fish in the distance, often equipped with a second set of helm controls.

Two-cycle engine:
A gasoline- or diesel-powered internal combustion engine that takes two cycles or strokes of the piston to complete its power phase. Also called two-stroke engine.

A boat in motion.

Utility boat:
A type of small, open powerboat, constructed of either fibreglass or aluminium, with minimal features. These include job boats, skiffs and work boats.

Compass variable that accounts for the difference in degrees between true north and magnetic north.

A bed or berth located in the bow that has a V-shape.

Propulsion system where the drive shaft initially runs forward into a gear box and then runs aft and down through the hull. The driveline forms a V-shape with the gear box at the pivot point.

Air introduced into a spinning propeller from the water's surface.

Very high frequency; a bandwidth designation commonly used by marine radios.

Waves created by a moving boat.

Walkaround :
A type of offshore fishing boat with a small to mid-size cabin and a perimeter deck that allows easy passage around the entire boat.

Waterline :
The intersection of the hull and the surface of the water.

Waypoint :
The coordinates of a specific location.

To raise anchor.

Windlass :
Rotating drum device used for hauling line or chain to raise and lower an anchor.

Working sails:
Sails used in normal winds.

To cruise in a motor yacht that typically ranges from 40- to 89- feet long.

Yard (yd):
Unit of length equal to 3 feet (91.5 centimetres).

To veer off course.

Zinc anodes:
Small pieces of zinc that attach to metal boat and engine components to help protect them from corrosion due to electrolysis, an effect caused when dissimilar metals are placed in a saltwater solution.