BALLASTTANK

Ballast tank

A ballast tank is a compartment within a boat, ship or other floating structure that holds water.

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ballast tank

Noun

  1. One of several external or internal tanks fitted in submarines; when filled with seawater they allow the boat to submerge; when emptied using compressed air buoyancy is restored and the vessel rises towards the surface. Auxiliary ballast tanks within the pressure hull allow the submarine to be trimmed.


The above text is a snippet from Wiktionary: ballast tank
and as such is available under the Creative Commons Attribution/Share-Alike License.

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