By 1980 the world fleet of container ships already amounted to more than 660 ships with a tonnage of about 11.3 million grt.
Ngo1980 umkhosi welizwe okanye wamazwe weenqanawa ezizizikhongozeli sele unomlinganiselo ongaphezulu kwamakhulu amathandathu anamashumi amathandathu eenqanawa enamalunga neshumi elinanye nesiqingatha isigidi umthamo wenqanawa -oyilenganiswe ngeetoni.