Kockums Varv, AB, Malmo, Sweden, has been awarded a $236-million order by the Saudi National Shipping Co. to build four large ro/ro vessels.

The ro/ro's are the largest of their kind in the world at 38,500 dwt each, with a capacity of 2,000 20-foot-equivalent units. The vessels are scheduled for delivery from the third quarter 1983.

The Saudi National Shipping Co. currently operates two 23,000-dwt container and ro/ro vessels on its Middle East-U.S. service where the new vessels will trade.