In the description of free surface it was shown that an effect of free-surface liquid was to reduce the righting lever by shifting G towards Z.
Kwigcazelo yokhululeko lwendawo lungaboniswa ngesiphumosokhululeko lwendawo lwamanzi ibakukunciphisa ubulungisa bomngangatho bolungelo olukhuselekileyo boku tshintsha u G ukuya ku Z.