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ballast water

Defined in 2 places across 2 titles of the United States Code.

“ballast water” means any water and associated sediments used to manipulate the trim and stability of a vessel;

Source

The term "ballast water" means any water, suspended matter, and other materials taken onboard a vessel—

(I) to control or maintain trim, draught, stability, or stresses of the vessel, regardless of the means by which any such water or suspended matter is carried; or

(II) during the cleaning, maintenance, or other operation of a ballast tank or ballast water management system of the vessel.

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