ClassNK issues Approval in Principle (AiP) for a Liquified CO₂ Carrier installing Wind-Assisted Propulsion System April 23, 2026 International Shipping, Classification Society, Maritime, Ship Building, Shipping Line, Trending News TOKYO: ClassNK has issued an Approval in Principle (AiP) for a Liquified CO₂ carrier installing the ‘Wind Challenger,’ a hard sail wind propulsion system. The ship is jointly developed by Mitsui O.S.K. Lines, Ltd.
