If the ballast tanks are pumped out the buoyancy of the box is increased so that it produces a watertight joint between the opening in the bottom of the ship and the filler openings in the floating box.
Ukuba izizinziso zetanki zibotshwe ngodlamko luyongezeleleka ukwenzel'ukuba likhuphe isidibanisi soqiniso manzi phakathi kovulo lomzantsi wenqanawa ezalisa uvulo lwebhokisi edadayo