6 Identical replacement engines
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Statutory Documents - IMO Publications and Documents - Circulars - Marine Environment Protection Committee - MEPC.1/Circular.795 Rev.6 – Unified Interpretations to MARPOL Annex VI – (10 June 2022) - Annex – Unified Interpretations to MARPOL Annex VI - 6 Identical replacement engines

6 Identical replacement engines

Regulation 13

Nitrogen oxides (NOX)

Regulation 13.1.1.2 reads as follows:

  • "Each marine diesel engine with a power output of more than 130 kW which undergoes a major conversion on or after 1 January 2000 except when demonstrated to the satisfaction of the Administration that such engine is an identical replacement to the engine which it is replacing and is otherwise not covered under paragraph 1.1.1 of this regulation."

Regulation 13.2.2 reads as follows:

  • "For a major conversion involving the replacement of a marine diesel engine with a non-identical marine diesel engine or the installation of an additional marine diesel engine, the standards in this regulation in force at the time of the replacement or addition of the engine shall apply."

Interpretation:

6.1 In regulation 13.1.1.2, the term "identical" (and hence, by application of the converse, in regulation 13.2.2 the term "non-identical") as applied to engines under regulation 13 should be taken as:

6.2 An "identical engine" is, as compared to the engine being replaced,footnote an engine which is of the same:

  • .1 design and model;

  • .2 rated power;

  • .3 rated speed;

  • .4 use;

  • .5 number of cylinders; and

  • .6 fuel system type (including, if applicable, injection control software):

    • .1 for engines without EIAPP certification, have the same NOx critical components and settings;footnote or

    • .2 for engines with EIAPP certification, belonging to the same Engine Group/Engine Family.

Parent topic: Annex – Unified Interpretations to MARPOL Annex VI
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