2.4.1 To enable an Administration to perform the
engine surveys described in 2.1,
the technical file required by 2.3.4 shall,
at a minimum, contain the following information:
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.1 identification of those components, settings
and operating values of the engine that influences its NOx emissions
including any NOx reducing device or system;
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.2 identification of the full range of allowable
adjustments or alternatives for the components of the engine;
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.3 full record of the relevant engine’s
performance, including the engine’s rated speed and rated power;
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.4 a system of onboard NOx verification
procedures to verify compliance with the NOx emission limits
during onboard verification surveys in accordance with chapter 6;
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.5 a copy of the relevant parent engine test data,
as given in section 2 of appendix 5 of
this Code;
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.6 if applicable, the designation and restrictions
for an engine that is an engine within an engine family or engine
group;
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.7 specifications of those spare parts/components
that, when used in the engine, according to those specifications,
will result in continued compliance of the engine with the applicable
NOx emission limit; and
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.8 the EIAPP Certificate, as applicable.
2.4.2 As a general principle, onboard NOx verification
procedures shall enable a surveyor to easily determine if an engine
has remained in compliance with the applicable requirements of regulation 13. At the same time, it
shall not be so burdensome as to unduly delay the ship or to require
in-depth knowledge of the characteristics of a particular engine or
specialist measuring devices not available on board.
2.4.3 The onboard NOx verification
procedure shall be one of the following methods:
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.1 engine parameter check method in accordance
with 6.2 to verify that an engine’s
component, setting and operating values have not deviated from the
specifications in the engine’s technical file;
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.2 simplified measurement method in accordance
with 6.3; or
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.3 direct measurement and monitoring method in
accordance with 6.4.
2.4.4 When considering which onboard NOx verification
procedures should be included in an engine’s technical file
to verify whether an engine complies with the applicable NOx emission
limit during the required onboard verification surveys, other than
at an engine’s initial onboard survey, any of the three onboard
NOx verification procedures as specified in 6.1 may be applied. However, the procedures
associated with the method applied are to be approved by the Administration.
If the method differs from the verification procedure method specified
in the technical file as originally approved, the procedure of the
method needs to be either added as an amendment to the technical file
or appended as an alternative to the procedure given in the technical
file. Thereafter the shipowner may choose which of the methods approved
in the technical file is to be used to demonstrate compliance.
2.4.5 In addition to the method specified by the
engine manufacturer and given in the technical file, as approved by
the Administration for the initial certification in the engine, the
shipowner shall have the option of direct measurement of NOx emissions
in accordance with 6.4. 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 Code. These monitoring records
shall be kept on board for three months for verification purposes
by a Party in accordance with regulation
10. 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 approved procedures
given in the Onboard Operating Manual. Where exhaust gas after-treatment
devices are fitted that influence the NOx emissions, the
measuring point(s) must be located downstream of such devices.