Tanks provided in various parts of a ship for introduction of water ballast when necessary to add weight to produce a change in trim or in stability of the ship, and for submerging submarines.
Iitanki ezibekwe kwiindawo ezahlukeneyo zenqanawe ukuze kwamkelwe/okanye kwaziswe ubunzima bamanzi xa kukho imfuneko yokongeza ubunzima ukuvelisa inguqu ekulungelelaniseni umthwalo okanye kuzinzo lwenqanawe, nakwiinkwili ezintywiliswayo.