ballast water
water contained in tanks on ships to improve their stability and buoyancy. This water can contain fishes and may be discharged in an area where the fish then become established as exotics

Dictionary of ichthyology. 2009.

Look at other dictionaries:

  • 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 (Marine) — Pour les articles homonymes, voir Ballast. Un ballast est une capacité équipant certains navires destinée par remplissage ou vidange à en modifier la flottabilité, les tirants d eau, l assiette ou la gite. Sommaire 1 À bord des navires de surface …   Wikipédia en Français

  • Ballast tank — A ballast tank is a compartment within a boat or ship, that holds water. A vessel may have a single ballast tank near its center or multiple ballast tanks typically on either side. A large vessel typically will have several ballast tanks… …   Wikipedia

  • Ballast (marine) — Pour les articles homonymes, voir Ballast. Un ballast est une capacité équipant certains navires destinée, par remplissage ou vidange, à : corriger la gîte ou l assiette avec un chargement déséquilibré ; accroître l enfoncement d un… …   Wikipédia en Français

  • water ballast — noun : water in specially constructed compartments (as of a ship or balloon) to serve as ballast * * * water ballast noun 1. Water carried by a ship to balance or redress the change of draught due to consumption of fuel or provisions or discharge …   Useful english dictionary

  • water — {{Roman}}I.{{/Roman}} noun 1 liquid ADJECTIVE ▪ boiling, chilled, cold, cool, freezing, frigid (AmE), hot, ice cold, icy, lukewarm …   Collocations dictionary

  • Water Resources Development Act of 1992 — The Water Resources Development Act of 1992 (WRDA 1992), USPL|102|580, was enacted by Congress of the United States on October 31, 1992. [ [http://thomas.loc.gov/cgi bin/bdquery/D?d102:1:./temp/ bdMCKV:@@@D summ2=m |/bss/d102query.html||Public… …   Wikipedia

  • ballast — [ balast ] n. m. • 1375 « lest »; mot scand., par le moy. bas all. 1 ♦ (1840; empr. à l angl.) Pierres concassées que l on tasse sous les traverses d une voie ferrée. Carrière à ballast (ou BALLASTIÈRE n. f. ). 2 ♦ (1943) Mar. Réservoir de… …   Encyclopédie Universelle

  • water-ballast — [ watɛrbalast ] n. m. • 1879 « lest d eau »; mot angl., de water « eau » et ballast → ballast ♦ Mar. 1 ♦ (1886) Compartiment d un navire servant au transport de l eau, du mazout..., et qui peut servir de lest. 2 ♦ (1907) Réservoir de plongée d un …   Encyclopédie Universelle

  • 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

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