<p>With wind-assist technology going mainstream, South Korea’s largest shipbuilding group has debuted its only sail system. HD Korea Shipbuilding &#38; Offshore Engineering, the holding company of HD Hyundai, has unveiled its Hi-Wing, a prototype of which has gone through land trials, and will shortly be tested at sea on an MR tanker belonging to HMM, &#8230;</p> </p><p><p>https://splash247.com/south-koreas-top-shipyard-debuts-its-own-sail-device/</p></p>