As already advised in ClassNK Technical Information No. TEC-0771 dated 13 May 2009, marine diesel engines with a power output of more than 5,000 kW and a per cylinder displacement at or above 90 liters installed onboard ships constructed on or after 1 January 1990 but prior to 1 January 2000 are to comply with Tier I emission limits using an Approved Method, provided that an Approved Method for that engine has been certified by an Administration (Reg. 13.7.1 of ANNEX VI).

Since the Administration of Denmark notified that they had certified an Approved Method for MAN B&W S60MC engines on 5 October 2011 and the IMO published the relevant information on 10 October 2011 in MEPC.1/Circ.770 as attached, this ClassNK Technical Information provides the relevant information on the Approved Method and their confirmation during survey, as described below. As for the information on the Approved Methods that were previously certified, please refer to ClassNK Technical Information No. TEC-0836 (MAN B&W S70MC engines), No. TEC-0848 (WARTSILA RTA engines) and No. TEC-0867 (MAN B&W S70MC and S50MC engines).

1. Diesel engine to which the Approved Method is to be applied and deadline for the application
Diesel engines that correspond to the following table are required to apply the Approved Methods provided that the fuel nozzle type and shop test performance values satisfy the conditions specified in the MEPC Circular.