China’s Guangzhou Shipyard International has emerged as the top bidder to construct two new Ro-Pax ferries for the Northern Isles routes in Scotland, as announced by Caledonian Maritime Assets Limited (CMAL). The 140-metre vessels are set to replace the ageing Helliar and Hildasay, which currently service the Aberdeen–Kirkwall–Lerwick route for Serco NorthLink Ferries. Designed to boost freight…