Because of the short lengths of the voyages and the large amounts of cargo that a ship can transport in a year the numbers of vessels involved will, however, be relatively small.
Ngenxa yeendlela ezimfutshane zabahambi ngeenqanawa kwakunye nomthwalo omkhulu enokuthi inqanawa iwuthwale ngonyaka inanu leenqanawa ezibonda kanyekayo liyakuba lincinci.