ClassNK issues Approval in Principle (AiP) for large liquefied CO2 carriers of 50,000 m³ and 23,000 m³ September 19, 2024 International Shipping, Maritime, Shipping Line, Trending News TOKYO : ClassNK has issued an Approval in Principle (AiP) for a design concept of large liquefied CO2 carriers of 50,000 m³ and 23,000 m³ jointly developed by Kawasaki Kisen Kaisha, Ltd., Mitsui O.S.K.