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

Heavy material carried by a ship for ensuring proper stability, so as to avoid capsizing and to secure effective propulsion.

"heavy material used to steady a ship," 1520s, from Middle English bar "bare" (see bare; in this case "mere") + last "a load, burden," or borrowed from identica [..]

heavy material, usually water, used to provide stability for large ships or other oceangoing vessels.

electrical supply for some lights, such as an ultraviolet light. Used to regulate electrical current

A device that maintains the current through a fluorescent, mercury, MH, or HPS lamp at the desired constant value, sometimes also providing the necessary starting voltage and current. BENEFICIAL INSEC [..]

A mechanism in a light assembly that contains the controls and electronics.

A device used to start and operate Discharge Lamps. It may include a Dimmer.

Heavy stuff in the hold of the ship to keep her steady.

Sand or water for weighting down a balloon.

Any material used to weight and/or balance an object. GloBallast, IMO (2014) 1 Note: Ships have carried solid ballast, in the form of rocks, sand or metal, for thousands of years. Since modern times, [..]

An auxiliary piece of equipment designed to start and to properly control the flow of power to gas discharge light sources such as fluorescent and high intensity discharge lamps. In metal halide systems, it is composed of the transformer, capacitor and connecting wiring; sodium systems require an igniter in addition to the transformer and capacitor [..]

A layer of coarse stone, gravel, slag, etc., over which concrete is placed.

The material most commonly used to form the road bed of a railway track. It is laid on the base formation of the track with the track laid on top of it and provides a storm water drainage medium. It usually consists of granite, whinstone or furnace slag. Ash is sometimes used in yards but not where any sort of speed is required as the dust gets int [..]

A part of every fluorescent lamp fixture. It is a circuit that controls the rate of flow of electrical current through a fluorescent lamp. Also used for mercury vapor, sodium vapor and other HID sourc [..]

An electrical device required to operate fluorescent lamps. Return to TOP

A device that controls the current in a fluorescent lamp.

A fluorescent light fixture component, the primary function of which is to provide sufficient starting voltage for the lamp. A ballast may also serve to heat the fluorescent lamp electrodes, and contr [..]

Anything that serves no particular purpose except to give bulk or weight to something or that provides additional stability.

According to 10 CFR 430.2 [Title 10 – Energy; Chapter II -- Department of Energy; Subchapter D -- Energy Conservation; Part 430 -- Energy Conservation Program for Consumer Products; Subpart A -- Gener [..]

(n) coarse gravel laid to form a bed for streets and railroads(n) any heavy material used to stabilize a ship or airship(n) an attribute that tends to give stability in character and morals; something [..]

weight used to increase boat stability (righting moment); ballast may be stationary (as in lead found in a keel bulb) or mobile (as in a sailor switching position to better balance the boat or water being strategically pumped into specific tanks in the hull)

 - A device that by means of inductance, capacitance, or resistance, singly or in combination, limits the lamp current of a fluorescent or high intensity discharge lamp. It provides the necessary circuit conditions (voltage, current and wave form) for start

"A heavy weight, usually sea water, necessary for the stability and safety of a ship at sea that is not carrying cargo."

Device used to maintain current in circuit by varying resistance in response to changes in voltage.

A transformer that steps up the voltage in a florescent lamp.

A man of no ballast. Not steady; not to be depended on. Unsteady as a ship without ballast. A similar phrase is, “The man wants ballast.”

Weight in the keel of a boat to add stability (righting moment).

Weights fixed around the car to maximise its balance and bring it up to the minimum weight limit.

A ballast controls the current delivered to a fluorescent or HID lamp. Most ballasts also convert the line voltage into the proper voltage and waveform needed to start and operate the lamp.

    A device used to provide starting current for certain types of lamps (fluorescent).

all fluorescent and most metal halide lamps need ballasts to operate. Because the arc generated in a lamp has almost no electrical resistance, ballasts are provided to regulate the lamp current. Magne [..]

A device used in conjunction with an electric-discharge lamp to cause the lamp to start and operate under the proper circuit conditions of voltage, current, wave form, electrode heat, etc.

Selected material placed on the road bed to hold the track in line.  Ballast preferably consists of hard particles easily handled in tampering, which distributes the load, drain well, and resist plant [..]

Stone or aggregate material spread on the ground for the purpose of holding the track in line laterally and longitudinally and also to provide drainage. ballast depth: Distance from the formation to t [..]

Material placed on a track roadbed to hold the track in alignment and elevation; it consists of hard principles that are stable, easily tamped, permeable, and resistant to plant growth.

Device used to maintain current in circuit by varying resistance in response to changes in voltage.

An electrical device used with fluorescent and HID lamps to supply sufficient voltage to start and operate the lamp but then limit the current during operation.

An electromagnetic device used with a gas discharge lamp to control starting and operating conditions.

Weight added to a vehicle usually to bring it to a minimum weight requirement-useful for adjusting balance in racing vehicles.

A heavy roofing material, typically a stone or concrete paver, used to weigh down waterproof layers (e.g. a single-ply membrane) and increase the thermal mass of the surface to decrease heat flux thro [..]

A device used with a discharge lamp to obtain the necessary voltage, current, and/or wave form for starting and operating the lamp.

Weight used for balancing a vessel.

Any weight used to improve a vessel's stability and/or trim. In most cases this weight is water pumped into ballast tanks.

Heavy weights packed in the bottom of a boat or ship to give her stability.

Heavy substances loaded by a vessel to improve stability, trim, sea-keeping and to increase the immersion at the propeller. In the days of sail rocks and sand were used. Modern ships use seawater load [..]

Weight in the keel to keep the boat upright; as in: Ballast can be lead or iron.

Any weight carried solely for the purpose of making the vessel more seaworthy. Ballast may be either portable or fixed, depending upn the condition of the ship. Fixed or permanent ballast in the form [..]

Heavy materials at the bottom of a ship used to keep the ship upright.

    Weight (solid or liquid) loaded into a ship to increase stability.  

Heavy material, such as iron, lead or stone placed in the bottom of a ship's hold to keep the vessel steady by lowering her centre of gravity and increasing her draft.

Weight at the bottom or the lower portion of the boat to give her stability and/or to provide satisfactory fore and aft trim.. Ballast can be place inside the hull of the boat or externally in a keel. [..]

Any liquid or solid weight placed in a ship to change the trim, increase the draft, or to regulate the stability

heavy weights packed in the bottom of a ship to give her stability.

Any solid or liquid weight placed in a vessel to increase the draft, to change the trim, or to regulate stability

Heavy substances loaded by a vessel to improve stability, trimming, sea keeping and to increase the immersion at the propeller. Sea water ballast is commonly’ loaded in most vessels in ballast tanks, [..]

Material used to improve the stability and control of a ship. In wooden ships usually stone, lead or iron; in metal ships, often water.

Is either pigs of iron, stones, or gravel, which last is called single ballast; and their use is to bring the ship down to her bearings in the water which her provisions and stores will not do. Trim t [..]

Weight put in a ship to help to keep her stable; nowadays this is usually seawater.

A weight at the bottom of the boat to help keep it stable. Ballast can be place inside the hull of the boat or externally in a keel

Heavy substances loaded by a vessel to improve stability, trim, sea-keeping and to keep the propeller immersed when not carrying cargo (unladen). Ballast voyage

Weight at the bottom or the lower portion of the boat to give her stability and/or to provide  satisfactory fore and aft trim.. Ballast can be place inside the hull of the boat or externally in a keel [..]

Heavy substances loaded by a vessel to improve stability, trimming, sea-keeping and to increase the immersion at the propeller. Sea water ballast is commonly' loaded in most vessels in ballast tanks, positioned in compartments right at the bottom and in some cases on the sides, called wing tanks. On a tanker, ballast is seawater that is taken [..]

"A heavy weight, usually sea water, necessary for the stability and safety of a ship at sea that is not carrying cargo."

A voyage during which the ship is not laden with cargo.

Heavy substances loaded by a vessel to improve stability, trim, sea-keeping and to increase the immersion at the propeller. In the days of sail rocks and sand were used. Modern ships use seawater loaded in ballast tanks placed at the bottom of the ship, or in some cases on the sides called wing tanks. Tankers admit ballast water into the cargo tank [..]

weight taken on board by a ship other than cargo for stability purposes when empty or for making the ship lower in the water (ballast is usually sea water)

Weight added to a vessel to increase draught and maintain the vessel in a safe condition of stability when there is no cargo onboard.  Water is usually used and on tankers this is pumped into dedicate [..]

Any substance, usually seawater, carried in the ballast tanks of a ship to ensure stability and handling. Liquid cargoes may also be used as ballast.

dense material, typically stone, placed low in the hold of a vessel to lower the center of gravity and increase stability. FH2004

Dead weight carried to assist the stability of a vessel. A ship is said to be in ballast when she has no merchandise on board, but only sand, gravel, mud, or rubbish as ballast. A yacht in marine parl [..]

The ballast of an old vessel should be removed every other season, scrubbed, and whitewashed with hot lime, or coated with black varnish, paraffin, or red lead. The hold of the yacht should at the sam [..]

a device or material used on ships (usually ballast tanks) that controls buoyancy and stability

A type of transformer that is used to limit the current to an ultraviolet (UV) lamp.

This is used to regulate the electrical current to some lighting systems, such as ultraviolet

Water, sand, or other heavy material used to give ships weight and stability.

Anything that serves no particular purpose except to give bulk or weight to something or that provides additional stability.

Heavy substances loaded by a vessel to improve stability, trimming, sea-keeping and to increase the immersion at the propeller. Sea water ballast is commonly' loaded in most vessels in ballast ta [..]

a weight carried aboard a lighter-than-air vehicle to offset the buoyancy of its lifting gas. Gas balloons commonly use sand, while blimps often carry metal shot in small canvas bags. Water has been t [..]

Weights placed in a car to meet the minimum weight regulations. Cars are always produced as light as possible, enabling mechanics to position ballast in the car to influence the weight distribution of [..]

A device required by electric-discharge light sources such as fluorescent or HID lamps to regulate voltage and current supplied to the lamp during start and throughout operation.

Used in fluorescent and High Intensity Discharge (HID) lamps; comprised of a transformer (often containing PCBs, a hazardous substance) and magnetic coil that controls the flow of current within the lamp and provides the required starting voltage; must be managed as a hazardous waste if it contains PCBs. ^ back to top

Heavy substances, such as seawater, loaded by a vessel to improve stability and control, and to submerge the vessel to a proper trim.

Heavy materials, (such as stone, gravel or tiles), carried by ships so as to stable in storms of the past. The ballast may contain artefacts where the ballast was taken on board, e.g. the stone heads [..]

Salt water pumped into various tanks on a ship to maintain a safe stability and stress condition.

Fuel or water placed in the double bottom of the vessel in order to weigh down or to stabilize the vessel.

Liquid or any other material loaded or pumped into ships' holds or tanks to alter the draught or counteract a list.

A device or component used to stabilize current flow, as in a Ballast Resistor.

A Ballast is an electrical device which is required for all discharge lamps. It limits the current through the lamp, preventing damage to both the lamp and the electrical supply.

  Mixed size aggregate.

(nautical) Heavy material that is placed in the hold of a ship (or in the gondola of a balloon), to provide stability. (figuratively) Anything that steadies emotion or the mind. Coarse gravel or [..]

(nautical,or|figuratively)

any weight in solid or liquid form taken on a ship to increase draught to change trim or to improve the stability; use of sea water is common

sand, gravel or water carried by a ship for reasons of stability when she is without cargo. Most vessels are fitted with water tanks and pumps specially for this purpose. Before a ship enters the St. [..]

The period of time during which a ship performs a voyage without cargo on board