World’s First Machine Room Safety Accreditation for Ammonia Fueled Ammonia Gas Carrier to be granted by ClassNK August 20, 2024 International Shipping, Maritime, Shipping Line, Trending News TOKYO : The world’s first accreditation* for “Machinery Room Safety for Ammonia” (MRS) will be granted by ClassNK for the ammonia-fueled medium gas carrier (AFMGC) currently being developed by a consortium that includes Nippon