South Korea—Navy Takes Delivery Of Upgraded Sub 

The South Korean navy has just received a submarine following two years of modernization, reports the Yonhap news agency (Seoul).  On Monday, Daewoo Shipbuilding and Marine Engineering delivered the upgraded Na Dae Yong to the navy at its shipyard on the southern island of Geoje.  During the refit, which began in June 2017, the shipbuilder installed an updated combat management system and a towed array sonar among other improvements, according to the Defense Acquisition Program Administration...