It is emphasised that the tonnage shown in the graph against the freighters is displacement tonnage at deep-load draught, and not gross tonnage.
Kuyagxinciniswa ukuba umthamo wenqanawa olinganiswe ngeetoni oboniswe kwisazobe ngokuchasene neenqanawa zokuthutha iinipahla ngumthamo weenqanawa olinganiswe ngeetoni othathelwe indawo kubungakanani bokutshona kwenqanawa emanzini obunzulu, nokungeyodazini yomthamo wenqanawa olinganiswe ngeetono.