ballast control

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• Ballast Point, New South Wales — Ballast Point is a 2.6 hectare area located in Birchgrove at the tip of the Balmain Peninsular in the Municipality of Leichhardt in Sydney, New South Wales, Australia. It is located between Snails Bay and Mort Bay in Port Jackson.HistoryBetween… …   Wikipedia

• Ballast — may mean: Objects: * Ballast tanks, a device used on ships and submarines and other submersibles to control buoyancy and stability * Ballast weights, metallic plates used to bring auto racing vehicles up to the minimum mandated weight *… …   Wikipedia

• ballast — [bal′əst] n. [LowG < MDu < bal, bad, useless (akin to OE bealu,BALE2) + last, a load] 1. anything heavy carried in a ship, aircraft, or vehicle to give stability or in a balloon or airship to help control altitude 2. anything giving… …   English World dictionary

• ballast — ballaster, n. ballastic /beuh las tik/, adj. /bal euhst/, n. 1. Naut. any heavy material carried temporarily or permanently in a vessel to provide desired draft and stability. 2. Aeron. something heavy, as bags of sand, placed in the car of a… …   Universalium

• Ballast water discharge and the environment — Cruise ships, large tankers, and bulk cargo carriers use a tremendous amount of ballast water, which is often taken on in the coastal waters in one region after ships discharge wastewater or unload cargo, and discharged at the next port of call,… …   Wikipedia

• Ballast tamper — A ballast tamper or tamping machine is a machine used to pack (or tamp) the track ballast under railway tracks to make the tracks more durable. Prior to the introduction of mechanical tampers, this task was done by manual labour with the help of… …   Wikipedia

• ballast — I. noun Etymology: probably from Low German, of Scandinavian origin; akin to Danish & Swedish barlast ballast; perhaps akin to Old English bær bare & to Old English hlæst load, hladan to load more at lade Date: 1530 1. a heavy substance placed in …   New Collegiate Dictionary

• ballast tank — noun : a tank in the hold of a ship that can be pumped full of or free from water ballast * * * ballast tank, a compartment in a ship or submarine which may be filled with water or emptied by means of pumps. Ballast tanks help control the… …   Useful english dictionary

• Control theory — For control theory in psychology and sociology, see control theory (sociology) and Perceptual Control Theory. The concept of the feedback loop to control the dynamic behavior of the system: this is negative feedback, because the sensed value is… …   Wikipedia

• ballast — bal•last [[t]ˈbæl əst[/t]] n. 1) naut. a heavy material carried on a vessel to control draft and stability or a balloon to control altitude 2) rai gravel or broken stone placed under the ties of a railroad 3) elm a device that maintains the… …   From formal English to slang

• ballast — /ˈbæləst / (say baluhst) noun 1. any heavy material carried by a ship or boat for ensuring proper stability, so as to avoid capsizing and to secure the greatest effectiveness of the propelling power. 2. something heavy, as bags of sand, placed in …