2.1 General
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - International Codes - NOx Technical Code (2008) - Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines - Chapter 2 - Surveys and Certification - 2.1 General

2.1 General

  2.1.1 Each marine diesel engine specified in 1.2, except as otherwise permitted by this Code, shall be subject to the following surveys:

  • .1 A pre-certification survey that shall be such as to ensure that the engine, as designed and equipped, complies with the applicable NOx emission limit contained in regulation 13. If this survey confirms compliance, the Administration shall issue an Engine International Air Pollution Prevention (EIAPP) Certificate.

  • .2 An initial certification survey that shall be conducted on board a ship after the engine is installed but before it is placed in service. This survey shall be such as to ensure that the engine, as installed on board the ship, including any modifications and/or adjustments since the pre-certification, if applicable, complies with the applicable NOx emission limit contained in regulation 13. This survey, as part of the ship’s initial survey, may lead to either the issuance of a ship’s initial International Air Pollution Prevention (IAPP) Certificate or an amendment of a ship’s valid IAPP Certificate reflecting the installation of a new engine.

  • .3 Renewal, annual and intermediate surveys, that shall be conducted as part of a ship’s surveys required by regulation 5, to ensure the engine continues to comply fully with the provisions of this Code.

  • .4 An initial engine certification survey that shall be conducted on board a ship every time a major conversion, as defined in regulation 13, is made to an engine to ensure that the engine complies with the applicable NOx emission limit contained in regulation 13. This will result in the issue, if applicable, of an EIAPP Certificate and the amendment of the IAPP Certificate.

  2.1.2 To comply with the various survey and certification requirements described in 2.1.1, there are methods included in this Code from which the engine manufacturer, shipbuilder or shipowner, as applicable, can choose to measure, calculate, test or verify an engine for its NOx emissions, as follows:

  • .1 test-bed testing for the pre-certification survey in accordance with chapter 5;

  • .2 onboard testing for an engine not pre-certificated for a combined pre certification and initial certification survey in accordance with the full test-bed requirements of chapter 5;

  • .3 onboard engine parameter check method, using the component data, engine settings and engine performance data as specified in the technical file, for confirmation of compliance at initial, renewal, annual and intermediate surveys for pre-certified engines or engines that have undergone modifications or adjustments to NOx critical components, settings and operating values, since they were last surveyed, in accordance with 6.2;

  • .4 onboard simplified measurement method for confirmation of compliance at renewal, annual and intermediate surveys or confirmation of pre-certified engines for initial certification surveys, in accordance with 6.3 when required; or

  • .5 onboard direct measurement and monitoring method for confirmation of compliance at renewal, annual and intermediate surveys only, in accordance with 6.4.

Parent topic: Chapter 2 - Surveys and Certification
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