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 here, he said new technology will be introduced to enhance the ports capacity. In this connection he said the Karachi Port Trust will start from the next month construction of a deep sea water terminal having a depth of 18 meters. This project will be completed by 2013, he added.