Compensating tanks are fitted so that the weight of the submarine can be adjusted during a patrol to allow for the change of density of sea water, the compression of the hull when dived, and for the consumption of stores, provisions and fuel.
Amatanki embuyekyzo ayafakwa ukuzo ubunzima benkwili bangalungelelaniswa ekujikelezeni kwenkwili ukuvumelana nokutshinteha kcixinzelelo lwamanzi olwondle uxinzelelo lwesiqu xa ithe yantywila, nokusetyenziswa kwamanzi kwamphahla, umphake nezibaso.