ClassNK awards approval in principle (AiP) for methanol fuel supply system developed by Mitsui E&S Shipbuilding April 12, 2024 International Shipping, Maritime, Ship Building, Technology, Trending News TOKYO : ClassNK has awarded an approval in principle (AiP) for a methanol fuel supply system developed by Mitsui E&S Shipbuilding Co., Ltd. Methanol is considered one of the promising alternative fuels for decarbonization, and