In very large tankers, the loading of ballast during the discharge of cargo reduces the stress and strain occasioned by the vessel being in a light (empty) condition.
Kwiinqanawa ezinkulu ezithutha ipetroli, imithwalo yozinziso ngoku kukhululwa imithwalo yezithuthi inganciphisa umsindo kunye noxinzelelo oluthi lube kwinqanawa eba kwilitha (elingenanto) ngemeko.