Pakistan National Shipping Corporation (PNSC) will buy four news ships including one oil container and three cargo ships, said Federal Minister for Ports and Shipping Babar Khan Ghauri on Saturday. Addressing a press conference in Karachi, he said new technology will be introduced to enhance the ports capacity. Karachi Port Trust will start the construction of a deep sea water terminal having a depth of 18 meters, Ghauri said. This project will be completed by 2013, he added.