Chapter 2.3 - Procedures for certification of an engine

 The shipowner shall have the option of direct measurement of NO_x emissions during engine operation. Such data may take the form of spot checks logged with other engine operating data on a regular basis and over the full range of engine operation or may result from continuous monitoring and data storage. Data must be current (taken within the last 30 days) and must have been acquired using the test procedures cited in this NO_x Technical Code. These monitoring records shall be kept on board for three months for verification purposes by the Parties to the Protocol of 1997. Data shall also be corrected for ambient conditions and fuel specification, and measuring equipment must be checked for correct calibration and operation, in accordance with the procedures specified by the measurement equipment manufacturer in the engine's technical file. Where exhaust gas aftertreatment devices are fitted which influence the NO_x emissions, the measuring point(s) must be located downstream of such devices.

 For application of this section it should be interpreted that any system or procedure utilized to monitor engine NO_x emissions by the direct measurement method shall meet the requirements of MEPC Resolution 103(49) "Guidelines for On-board NO_x Verification Procedure - Direct Measurement and Monitoring Method".

 To demonstrate compliance by the direct measurement method, sufficient data shall be collected to calculate the weighted average NO_x emissions in accordance with this Code.

 For application of this section it should be interpreted that sufficient data shall be collected by the direct measurement method to enable the weighted average NO_x emissions to be determined in accordance with MEPC Resolution 103(49) "Guidelines for On-board NO_x Verification Procedure - Direct Measurement and Monitoring Method".

 Every marine diesel engine installed on board a ship shall be provided with a technical file. The technical file shall be prepared by the engine manufacturer and approved by the Administration, and required to accompany an engine throughout its life on board ships. The technical file shall contain information as specified in 2.4.1.

 For application of this section it should be interpreted that the term "engine manufacturer" is the entity which applied for the engine certification.

 Flow charts providing guidance for compliance with the requirements of an initial, periodical and intermediate surveys for certification of marine diesel engines installed on board ships are provided in figures 2 and 3 of appendix 2 of this Code.

 This section should be interpreted as follows:

The text in chapter 2 gives the certification procedures which should be followed. Where discrepancies exist with figures 2 and 3, the text of chapter 2 takes precedence.