1.3 Definitions
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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 1 - General - 1.3 Definitions

1.3 Definitions

  1.3.1 Nitrogen Oxide (NOx) emissions means the total emission of nitrogen oxides, calculated as the total weighted emission of NO2 and determined using the relevant test cycles and measurement methods as specified in this Code.

  1.3.2 Substantial modification of a marine diesel engine means:

  • .1 For engines installed on ships constructed on or after 1 January 2000, substantial modification means any modification to an engine that could potentially cause the engine to exceed the applicable emission limit set out in regulation 13. Routine replacement of engine components by parts specified in the technical file that do not alter emission characteristics shall not be considered a “substantial modification” regardless of whether one part or many parts are replaced.

  • .2 For engines installed on ships constructed before 1 January 2000, substantial modification means any modification made to an engine that increases its existing emission characteristics established by the simplified measurement method as described in 6.3 in excess of the allowances set out in 6.3.11. These changes include, but are not limited to, changes in its operations or in its technical parameters (e.g., changing camshafts, fuel injection systems, air systems, combustion chamber configuration, or timing calibration of the engine). The installation of a certified approved method pursuant to regulation 13.7.1.1 or certification pursuant to regulation 13.7.1.2 is not considered to be a substantial modification for the purpose of the application of regulation 13.2 of the Annex.

  1.3.3 Components are those interchangeable parts which influence the NOx emissions performance, identified by their design/parts number.

  1.3.4 Setting means adjustment of an adjustable feature influencing the NOx emissions performance of an engine.

  1.3.5 Operating values are engine data, like cylinder peak pressure, exhaust gas temperature, etc., from the engine log that are related to the NOx emission performance. These data are load-dependent.

  1.3.6 The EIAPP Certificate is the Engine International Air Pollution Prevention Certificate which relates to NOx emissions.

  1.3.7 The IAPP Certificate is the International Air Pollution Prevention Certificate.

  1.3.8 Administration has the same meaning as article 2, subparagraph (5) of MARPOL 73.

  1.3.9 Onboard NOx verification procedures mean a procedure, which may include an equipment requirement, to be used on board at initial certification survey or at the renewal, annual or intermediate surveys, as required, to verify compliance with any of the requirements of this Code, as specified by the applicant for engine certification and approved by the Administration.

  1.3.10 Marine diesel engine means any reciprocating internal combustion engine operating on liquid or dual fuel, to which regulation 13 applies, including booster/compound systems, if applied. In addition, a gas-fuelled engine installed on a ship constructed on or after 1 March 2016 or a gas-fuelled additional or non-identical replacement engine installed on or after that date is also considered as a marine diesel engine.

 Where an engine is intended to be operated normally in the gas mode, i.e. with the gas fuel as the main fuel and with liquid fuel as the pilot or balance fuel, the requirements of regulation 13 have to be met only for this operation mode. Operation on pure liquid fuel resulting from restricted gas supply in cases of failures shall be exempted for the voyage to the next appropriate port for the repair of the failure.

  1.3.11 Rated power means the maximum continuous rated power output as specified on the nameplate and in the technical file of the marine diesel engine to which regulation 13 and the Code apply.

  1.3.12 Rated speed is the crankshaft revolutions per minute at which the rated power occurs as specified on the nameplate and in the technical file of the marine diesel engine.

  1.3.13 Brake power is the observed power measured at the crankshaft or its equivalent, the engine being equipped only with the standard auxiliaries necessary for its operation on the test bed.

  1.3.14 Onboard conditions mean that an engine is:

  • .1 installed on board and coupled with the actual equipment that is driven by the engine; and

  • .2 under operation to perform the purpose of the equipment.

  1.3.15 A technical file is a record containing all details of parameters, including components and settings of an engine, which may influence the NOx emission of the engine, in accordance with 2.4 of this Code.

  1.3.16 A record book of engine parameters is the document used in connection with the engine parameter check method for recording all parameter changes, including components and engine settings, that may influence NOx emission of the engine.

  1.3.17 An approved method is a method for a particular engine, or a range of engines, which, when applied to the engine, will ensure that the engine complies with the applicable NOx limit as detailed in regulation 13.7.

  1.3.18 An existing engine is an engine which is subject to regulation 13.7.

  1.3.19 An approved method file is a document which describes an approved method and its means of survey.

  1.3.20 Electronic Record Book means a device or system, approved by the Administration, used to electronically record the entries required under this Code in lieu of a hard copy record book.

Parent topic: Chapter 1 - General
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