In addition to the large quantities of a specific cargo that will need to be carried continuously there will continue to be an appreciable quantity of cargo that is available sporadically, is non-uniform in nature, and that has to be carried over various, ever-changing routes.
Ukongeza kubuninzi bomthwalo othile ofuna ukuthwalwa rhoqo iza kuqhubekeka ukuba bubuninzi obubonakalayo obubakho manqapha-nqapha aziyonto inye ngokwendalo, kwaye ziye zithwalwe zisisiwa kwindlela ezininzi ezingatshintshiyo