If the size of the tankers exceeds that which can be handled by the ports, the large tankers have to tranship their cargoes to smaller ships either at sea or in base ports.
Ukuba umlinganiselo wamatanki ugqitha lowo ubulinganiselwe lunxweme, iitanki ezinkulu mazinikezele imithwalo yazo kwinqanawa ezincinci elwandle okanye elunxwemeni.