Those basic development trends that are common to all ship types arise from the efforts that have been made to improve the efficiency of maritime transport i.e. the ratio of benefit to expenditure.
Iinkqubela-phambili ezinentsingiselo efanayo kuzo zonke iindidi zeenqanawa, iphuma kumandla awenziweyo ukunyusa izinga lemfuneko yezithuthi zaseiwandle, umzekelo umlinganiso wakuzuza kwinkcitho.