Statement of Fact for Tier III NOx emissions issued

The general cargo vessel “Santa Vista” entered into service in October 2011

The classification society ClassNK announced that it had awarded its first ever Statement of Fact for Tier III nitrogen oxide (NOx) reductions to a marine diesel engine incorporating a selective catalytic reduction (SCR) system.

The document verifies that the NOx emission measurement results for the engine, fitted with a pre-turbocharger SCR system developed by Hitachi Zosen Corporation, meets the NOx Tier III emission limits stipulated in amendments to Annex VI of the International Convention for the Prevention of Pollution from Ships 1973 (MARPOL). 

The engine was fitted as the propulsion system for the 37,800 dwt general cargo vessel “Santa Vista”, built by Naikai Zosen Corporation for Nissho Shipping Co., Ltd. Anticipating a growing interest in SCR systems and their applications in the near future, ClassNK has further released new guidelines, Guideline for SCR (Selective Catalytic Reduction) Systems and Reductant Agent Supply Systems, to assist manufacturers, shipyards, and owners in installing such systems on their commercial vessels.

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