Until now, M0 notated (UMS) vessels equipped with "diesel engines of 2,250 kW maximum continuous power and above or having cylinders of more than 300 mm bore" have been required to have crankcase oil mist detectors installed in the crankcase. On 30 October 2009, this requirement will extend to all non-M0 vessels in accordance with the amendment of Part D of ClassNK Rules. This amendment will apply to engines as follows:

1. when an application for certification of an engine is dated on or after 1 January 2010; or
2. when an engine is to be installed onboard a new ship for which the date of contract for construction is on or after 1 January 2010.
* The term "contract for construction" is defined in the latest version of IACS Procedural Requirement (PR) No. 29 (refer to the attachment).

"An application for certification of an engine is dated on or after 1 January 2010" in item 1 above refers to diesel engines:
1. installed on ships whose application for Classification Survey during Construction is submitted to the Society on or after the date indicated, and
2. specified in the application for Classification Survey during Constructions, including information on each diesel engine such as the name of the manufacturer, the model, the number, rated output and rated speed of the engine.

In this regard, please note that if some drawings of a diesel engine or an application for survey of a diesel engine including information on the diesel engine, i.e. the shipbuilder's name, hull number, the model, number, rated output and rated speed of the engine, is submitted from the engine manufacturer before 1 January 2010, it will be considered that the date of application for certification of the diesel engine is before the date on which the new requirement described above comes into effect (i.e. 1 January 2010).

(To be continued)