ballasting


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Related to ballasting: Ship in ballast

bal·last

 (băl′əst)
n.
1. Heavy material that is carried to improve stability or maintain proper trim, as on a ship, or to limit buoyancy, as on a balloon.
2.
a. Coarse gravel or crushed rock laid to form a bed for roads or railroads.
b. The gravel ingredient of concrete.
3. Something that gives stability, especially in character.
tr.v. bal·last·ed, bal·last·ing, bal·lasts
1. To stabilize or provide with ballast.
2. To fill (a railroad bed) with or as if with ballast.

[Perhaps from Old Swedish or Old Danish barlast : bar, mere, bare; see bhoso- in Indo-European roots + last, load.]
References in periodicals archive ?
Instead of installing a ballast water management system (BWMS) on board the vessel for this single trip, Damens InvaSave supplied clean D2-standard ballast water for ballasting of the vessel in the Netherlands.
Under the best circumstances, screen filtration would require large ships to install expensive equipment to keep up with their ballasting rates of several thousand tons per hour.