In some merchant ships they enclose the ballast tanks, which can be filled with sea water to give additional stability to the ship when she is lightly loaded ; when in this condition the ship is said to be in ballast .
Kwezinye iinqanawa zorhwebo ivala iitanki zebhalasti, anokuthi agcwaliswe ngamanzi olwandle ukunika ngenkxaso eyongezelelekileyo yokuzinzisa inqanawa xa inomthwalo omninzi; xa inqanawa ikule meko kuthiwa ikwibhalasti.