Wärtsilä announced that it will supply an integrated hybrid propulsion system for two new hybrid RoRo vessels. As informed, the ships are being built at the China Merchants Jinling shipyard (Weihai) Co., Ltd for the Swedish shipping company Stena RoRo. The ships will be the world’s first methanol fuelled hybrid RoRo vessels and will operate in the Stena Line Irish Sea system. The