With reference to the Revised MARPOL Annex VI that entered into force on 1 July 2010, we have been informed that another approved method as per Regulation 13.7 is now available (ref Technical eNewsletter published 12 November 2010). This concerns the retrofit of NOx-reduction arrangements on large marine diesel engines installed on vessels constructed between 1 January 1990 and 1 January 2000.

On 4 February 2011, the Administration of Germany notified IMO that they had certified an approved method for the following engine types designed by Wärtsilä Switzerland Ltd:

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IMO published this information on 17 February 2011 in MEPC.1/Circ.743. A list of applicable vessels as identified by Wärtsilä Switzerland Ltd is enclosed with the circular. This means that all vessels keel-laid between 1 January 1990 and 1 January 2000 that have these engine types installed must comply with MARPOL Annex VI Reg.13.7 by installing the approved method specified in MEPC.1/Circ.743. This has to take place no later than the first renewal survey for the IAPP certificate occurring on or after 5 February 2012 (one year after the notification). It is the shipowner’s responsibility to ensure that the installation takes place within the time limit allowed.

If the IAPP annual survey is performed before the approved method is installed, “Approved Method exists” is to be ticked in table 2.2.1 in the IAPP Certificate. When the Approved Method has been installed, both “Approved Method exists” and “Approved Method installed” are to be ticked.

In order to assist our customers in following up the requirement, DNV will issue an RR (Retroactive Requirement) for vessels identified by Wärtsilä Switzerland Ltd. However, there may be vessels with applicable engines installed that are not identified in the IMO circular. Hence we urge shipowners to consider whether their vessels are affected by the requirement.

Date: 2011-03-15