Under the conditions of the free market economy this behaviour appears economically justifiable, even though, as has been mentioned above, combined ore-oil ships involve both high building and high running costs.
Phantsi kwemeko apho kwezoqoqosho amaxabiso ebekwa ngabagqatswa bengenasithintelo le meko ibonakele igwetyelwa ngokoqoqosho, nangona, njengokuba bekuchaziwe ngaphambili, iinqanawa ezidityanisiweyo ze-oyile weze-oyile ekrwada zidibanisa izakhiwo eziphezulu kwakunye namaxabiso aphezulu abalekayo.