interpretations of the international convention of the prevention of pollutions from ships

8/6/2019 Interpretations of the International Convention of the Prevention of Pollutions From Ships

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INTERNATIONAL ASSOCIATION OF CLASSIFICATION SOCIETIES

Interpretations

of the

International Convention

for the Prevention of

Pollution from Ships,

1973 as modified by

the Protocol of

1978 relating thereto

and its Annexes

IACS Ints. 2010


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Contents, Page 1

CONTENTS

MPC1 Periodical surveys of oil content meters 1988

MPC2 Operational manuals for oil discharge monitoring and control systems 1988

MPC3 Machinery space oil discharge monitoring and control systems 1988

MPC4 Discharge of segregated ballast 1988

MPC5 Minimum vertical depth of each double bottom tank or space 1990

MPC6 Calculation of the aggregate capacity of SBT 1997

MPC7 Deleted April 2010

MPC8 Deleted in Oct 2005

MPC9 Interpretation of Width of Wing Tanks and Height of Double Bottom Tanksat Turn of the Bilge Area June 2002

MPC10 Endorsement of Certificates with the Date of Completion of the Rev.1 Nov 2005Survey on which they are Based

MPC11 Interpretation to MARPOL I/25A May 2004

MPC 12 Annex V1 of Marpol 73/78 Rev.1 Mar 2006Regulation 1

MPC 13 Annex V1 of Marpol 73/78 Rev.1 Mar 2006Regulation 2 (4)

MPC 14 Annex V1 of Marpol 73/78 July 2004Regulation1 / Regulation 5

MPC 15 Annex V1 of Marpol 73/78 July 2004Regulation 9 (4) (b)

MPC 16 Annex V1 of Marpol 73/78 July 2004Regulation 13 (1) (a) (i)

MPC 17 Annex V1 of Marpol 73/78 July 2004Regulation 13 (1) (a) (ii)

MPC 18 Annex V1 of Marpol 73/78 Rev.1 Mar 2006Regulation 13 (1) (b) (i)

MPC 19 Annex V1 of Marpol 73/78 July 2004Regulation 13 (1) (c)

MPC 20 Annex V1 of Marpol 73/78 July 2004Regulation 13 (2) (a) (i)

MPC 21 Annex V1 of Marpol 73/78 Rev.1 Mar 2006Regulation 13 (2) (a) (iii)

MPC 22 Annex V1 of Marpol 73/78 July 2004Regulation 13 (3) (a)

MPC 23 Annex V1 of Marpol 73/78 July 2004Regulation 13 (3) (b)

IACS Int. 2010


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MPC 24 Annex V1 of Marpol 73/78 July 2004Regulation 14 (6)

MPC 25 Annex V1 of Marpol 73/78 July 2004Regulation 16 (2) (a)


MPC 27 Annex V1 of Marpol 73/78 July 2004

Regulation 16 (7)

MPC 28 Deleted in Dec 2005


MPC 30 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of July 2004Emission of Nitrogen Oxides from Marine Diesel EnginesTable 3- Symbols and Subscripts for terms and variables used in the formulae forthe test-bed measurement methods

MPC 31 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of July 2004Emission of Nitrogen Oxides from Marine Diesel Engines

Chapter 1.2.1

MPC 32 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of July 2004Emission of Nitrogen Oxides from Marine Diesel EnginesChapter 1.3.2.2

MPC 33 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Rev.1 Mar 2006Emission of Nitrogen Oxides from Marine Diesel EnginesChapter 2.2.4

MPC 34 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of July 2004Emission of Nitrogen Oxides from Marine Diesel EnginesChapter 2.2.5

MPC 35 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Rev.1 Mar 2006

Emission of Nitrogen Oxides from Marine Diesel EnginesChapter 2.2.8







MPC 42 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Rev.1 Mar 2006Emission of Nitrogen Oxides from Marine Diesel Engines

Chapter 2.3.13


Contents, Page 2

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5/129


MPC 64 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of July 2004Emission of Nitrogen Oxides from Marine Diesel EnginesChapter 5.6 Permissible deviations of instruments for engine-related parametersand other essential parameters

MPC 65 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of July 2004

Emission of Nitrogen Oxides from Marine Diesel EnginesChapter 5.9.1.2






MPC 71Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of July 2004Emission of Nitrogen Oxides from Marine Diesel EnginesChapter 5.9.6.2




MPC 75 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of July 2004Emission of Nitrogen Oxides from Marine Diesel EnginesChapter 5.11 Deviation evaluation for gaseous emissions



MPC 78 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Rev.1 Mar 2006Emission of Nitrogen Oxides from Marine Diesel EnginesChapter 6.2.3.4.2

Contents, Page 4

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MPC 79 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Rev.1 Mar 2006Emission of Nitrogen Oxides from Marine Diesel EnginesChapter 6.2.3.5

MPC 80 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Rev.1 Mar 2006Emission of Nitrogen Oxides from Marine Diesel EnginesAppendix 4 Calibration of the analytical instruments (Refer to the chapter 5 ofthe NOX Technical Code)1 Introduction

MPC 81 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of July 2004Emission of Nitrogen Oxides from Marine Diesel EnginesAppendix 4 Calibration of the analytical instruments (Refer to the chapter 5 ofthe NOX Technical Code)8.1

MPC 82 Regulation 14, Annex VI of MARPOL 73/78 Sept 2005

MPC 83 Regulation 18, Annex VI of MARPOL 73/78 Sept 2005

MPC 84 Regulation 16(9) Annex VI of MARPOL 73/78 Nov 2005

MPC 85 Regulation 22(5), Annex I of MARPOL 73/78 as amended by resolution Rev.4 Sept 2008MEPC.117(52)

MPC86 Annex IV of MARPOL 73/78Regulation 10.1 as amended by Resolution MEPC.115(51) Corr.1 Oct 2007

MPC87 Annex I of MARPOL 73/78 Regulation 12A as amended by Resolution Jan 2007MEPC.141(54)

MPC88 Annex IV of MARPOL 73/78 Feb 2007Regulation 9.1.1

MPC 89

MPC 90 Annex I of MARPOL 73/78 Regulation 1 as amended by Resolution Sept 2007MEPC.117(52)

MPC 91 Annex IV of MARPOL 73/78 Sept 2007

MPC 92 Tonnage to be used when applying MARPOL Annex VI Oct 2007

MPC 93 Annex I of MARPOL 73/78 Regulation 23 Accidental oil outflow performance, July 2008as amended by Resolution MEPC.117 (52)

MPC 94 Annex I of MARPOL 73/78 Regulation 12A.6-8 and 11.8 Oil Fuel Tank July 2008Protection, as amended by Resolution MEPC.141(54)

MPC 95 Measurement of Distances Aug 2008

MPC96 Initial Statutory Surveys at New Construction Corr.1 Jul 2010

MPC 97 Volatile Organic Compounds (VOCs) Management Plan July 2010

Contents, Page 5

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MPC1 - MPC2

Periodical surveys of oil content meters

(Annex I, Regulation 15(3))

A periodical survey of an oil discharge monitoring and control system would include a functional test asdescribed in Resolution MEPC 13(19) but not a test with oil to verify the continuing accuracy of the oilcontent meter.

Operational manuals for oil discharge

monitoring and control systems

(Annex I, Regulation 15(3) (c))

For compliance with Regulation 15(3) (a) and (c) of MARPOL 73/78 - Annex I and IMO ResolutionsA 496 (XII) and MEPC 13 (19), the Oil Discharge Monitoring and Control System Operational Manualis to contain all the details necessary to operate and maintain the system and should include at least thefollowing information. The information may be grouped as indicated, or in an equivalent manner.

Introduction : Particulars of the ship, together with the date on which the system was/is to be installedand index to remainder of manual.Text of Regulations 15(3) (a) and 9(1) to be quoted in full.

Section 1 : Manufacturer's equipment manuals for major components of the system. These mayinclude installation, commissioning, operating and fault finding procedures for the oilcontent monitor.

Section 2 : Operations manual comprising a description of the ship's cargo ballast systems,designated overboard discharges with sampling points, normal operational procedures,automatic inputs, manual inputs (as applicable), starting interlock and discharge valvecontrol (as applicable), override system, audible and visual alarms, outputs recorded and,where required for manual input, flow rate when discharging by gravity and whenpumping ballast overboard. It should also include instructions for the discharge of oilywater following mal-function of the equipment.The above information is to be supported by copies of relevant approved diagrams.Reference may be made to Section 1, where applicable.

Section 3 : Technical manual comprising fault finding schedules, maintenance record and electrical,

pneumatic and hydraulic schematic diagrams and descriptions of the complete system.Reference may be made to Section 1, where applicable.

Section 4 : Test and check-out procedures to include a functional test at installation and guidancenotes for the Surveyors carrying out initial and in-service surveys.Reference may be made to Section 1, where applicable.

Appendix I : Technical installation specification including location and mounting of components,arrangements for maintaining integrity of 'safe' zones, safety requirements for electricalequipment installed in hazardous zones supported by copies of approved drawings,sample piping layout and sample delay calculations, design and arrangements ofsampling probes, flushing arrangements and zero setting.Reference may be made to Section 1, where applicable.

Appendix II : Copy of Type Approval Certificate and Workshop Certificates for major components.

MPC1(1988)

MPC2(1988)

IACS Int. 1988

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MPC3 - MPC4

Machinery space oil discharge monitoringand control systems


As neither Regulation 16(5) nor Resolution A444(XI) specifically require it, a Classification Societycannot insist on automatic recording of date and time in an oil discharge monitoring and control systemprovided for 100 ppm oily water separating equipment.

Discharge of segregated ballast


For new construction ships, an overboard discharge outlet for segregated ballast should be providedabove the deepest ballast waterline in order to facilitate compliance with Regulation 18(6).For other ships (without this facility), the Regulation requires that the surface of the ballast water beexamined immediately before discharge, to ensure that no contamination with oil has taken place.Further guidance from the Committee on how this should be done would be appreciated, particularly inthe case of double bottom tanks. One solution could be the provision of a sampling line to the oilcontent meter or an arrangement similar to a part flow system.

Minimum vertical depth of each doublebottom tank or space

(Annex I, Regulation 13E (4) (b))

For the purpose of determining the minimum vertical depth of each double bottom tank or space to betaken into account when calculating the protecting area PAg, suction wells may be neglected, providedsuch wells are not excessive in area and extend below the cargo tank for a minimum distance and in no

case more than half the height of the double bottom tank or space.

MPC3(1988)

MPC4(1988)

MPC5(1990)

IACS Int. 1990

vv

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MPC6

Calculation of the aggregate capacity ofSBT(Regulation 13F (3) (d) 4.12

In calculating the aggregate capacity under regulation 13F (3) (d), the following should be taken intoaccount:

.1 the capacity of engine-room ballast tanks should be excluded from the aggregate capacity ofballast tanks;

.2 the capacity of ballast tank located inboard of double hull should be excluded from the aggregatecapacity of ballast tanks (see figure 1).

Note: This IACS Unified Interpretation was submitted to IMO and is contained in MEPC/Circ. 316 of25th July 1996.

MPC6(1997)

IACS Int. 1997

FPTP/R

SBT

SBT

E/RAPT

A

A

SBTCOTSBT

SECTION A-A

Fig. 1

COTAssumed double hull line

SBT

SBT

SBT SBT

SBTSBT

SBT SBT

SBT SBT

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MPC6

.3 spaces such as void spaces located in the double hull within the cargo tank length should be

included in the aggregate capacity of ballast tanks (see figure 2).

IACS Int. 1997

MPC6(1997)

FPT

VOID SPACES

VOID SPACES

P/R

SBT

SBT

E/RAPT

SBT*SBT*

SBT* SBT*

B

B B

B

SBT* SBT*COT

VOID SPACES VOID SPACES

SECTION B-B

Fig. 2

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MPC7

Page 1 of 1 IACS Int. 1998/Corr.1 1999

A2(cont)

MPC7(May

1998)

(Corr.1Feb 1999)

Hydrostatic Balance Loading

Deleted Apr 2010, since Hydrostatic Balance Loading is no longer acceptable underMARPOL Annex I.

End ofDocument


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MPC 8

Interpretation of installed on board

(MARPOL 73/78, Annex VI/16(2)(a))

Deleted in Oct 2005

MPC8(Oct.1999)

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IACS Req. 2002

MPC 9

MPC9(June 2002)

Interpretation of Width of Wing Tanks and

Height of Double Bottom Tanks at Turn of the

Bilge Area

(MARPOL 73/78, Annex I/13 F (3)(c))

The requirements of Reg. 13F(3)(c) at turn of the bilge areas are applicable throughout theentire tank length.

Note: 1. This UI MPC 9 is to be uniformly implemented by IACS Members and Associates from1 January 2003. vv

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Endorsement of Certificates with the Dateof Completion of the Survey on which theyare Based

Resolutions MSC.170(79), MSC.171(79), MSC.172(79), MSC.174(79) throughMSC.179(79) and MSC.181(79) through MSC.187(79) require that the identifiedcertificates include the statement:

"Completion date of the survey on which this certificate is based:dd/mm/yyyy".

Interpretation

For application of the above resolutions, the following IACS UnifiedInterpretation applies:

The Completion date of the survey on which this certificate is based, is the date ofthe last initial/renewal survey visit on which all statutory and class items, required tobe surveyed, have been surveyed (regardless if they were found satisfactory or withminor deficiency).

Note:

1. This UI is to be uniformly implemented by IACS Members and Associates from 1March 2004.

2. Revision 1 of this UI is to be uniformly implemented by IACS Members andAssociates from 1 July 2006.

IACS Int. 2003/Rev.1 2005

MPC 10

SC183(Nov 2003)(Rev.1, Nov.

2005)

LL67(Nov 2003)(Rev.1, Nov.2005)

MPC10(Nov 2003)(Rev.1, Nov.2005)

MPC10-1


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MPC 11

Interpretation to MARPOL I/25A

Regulation 25A:

Intact stability

(1) This regulation shall apply to oil tankers of 5,000 tons deadweight and above

(a) for which the building contract is placed on or after 1 February 1999, or

(b) in the absence of a building contract, the keels of which are laid orwhich are at a similar stage of construction on or after 1 August 1999,or

(c) the delivery of which is on or after 1 February 2002, or

(d) which have undergone a major conversion

(i) for which the contract is placed after 1 February 1999, or

(ii) in the absence of a contract, the construction work of which isbegun after 1 August 1999, or

(iii) which is completed after 1 February 2002.

(2) Every oil tanker shall comply with the intact stability criteria specified insubparagraphs (a) and (b) of this paragraph, as appropriate, for any operating draughtunder the worst possible conditions of cargo and ballast loading, consistent with goodoperational practice, including intermediate stages of liquid transfer operations. Underall conditions the ballast tanks shall be assumed slack.

(a) In port, the initial metacentric height GMo, corrected for free surfacemeasured at 0 heel, shall be not less than 015m,

(b) At sea, the following criteria shall be applicable

(i) the area under the righting lever curve (GZ curve) shall be notless than 0.055 m.rad up to = 30 angle of heel and not lessthan 0.09 m.rad up to = 40 or other angle of flooding f* ifthis angle is less than 40Additionally, the area under therighting lever curve (GZ curve) between the angles of heel of30 and 40 or between 30 and f, if this angle is less than40, shall be not less than 0.03 m.rad;

_________________*fis the angle of heel at which openings ip the hull, superstructures or deck-houses, which cannot be closed weathertight, immerse In applying this

criterion, small openings through which progressive flooding cannot take place

need not be considered as open.

MPC11(May 2004)

IACS Int. 200411-1

Note:

1. This UI is to be uniformly implemented by IACS Members and Associates from 1April 2005.

2. The damage stability requirements in MARPOL I/13F and I/25 shall not apply forthe purpose of demonstrating compliance with MARPOL Reg. I/25A. v


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(ii) the righting lever GZ shall be at least 0.20 m at an angle of heelequal to or greater than 30;

(iii) the maximum righting arm shall occur at an angle of heelpreferably exceeding 30 but not less than 25; and

(iv) the initial metacentnc height GMo, corrected for free surfacemeasured at 0 heel, shall be not less than 0.15m.

(3) The requirements of paragraph (2) shall be met through design measures. Forcombination carriers simple supplementary operational procedures may beallowed.

(4) Simple supplementary operational procedures for liquid transfer operationsreferred to in paragraph (3) shall mean written procedures made available to themaster which:

(a) are approved by the Administration;

(b) indicate those cargo and ballast tanks which may, under any specificcondition of liquid transfer and possible range of cargo densities, beslack and still allow the stability criteria to be met. The slack tanks mayvary during the liquid transfer operations and be of any combinationprovided they satisfy the criteria;

(c) will be readily understandable to the officer-in-charge of liquid transferoperations;

(d) provide for planned sequences of cargo/ballast transfer operations;

(e) allow comparisons of attained and required stability using stabilityperformance criteria in graphical or tabular form;

(f) require no extensive mathematical calculations by the officer-in-charge;

(g) provide for corrective actions to be taken by the officer-in-charge incase of departure from recommended values and in case of emergencysituations; and

(h) are prominently displayed in the approved trim and stability booklet andat the cargo/ballast transfer control station and in any computersoftware by which stability calculations are performed.

Interpretation:

For proving compliance with Reg.I/25A, as an alternative to the loading case describedin MARPOL Unified Interpretation 11A it is accepted to carry out an extensive analysiscovering all possible combinations of cargo and ballast tank loading. For suchextensive analysis conditions it is considered that:

(a) Weight, centre of gravity co-ordinates and free surface moment for all tanksshould be according to the actual content considered in the calculations.

MPC11

(cont d)

MPC 11

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(b) The extensive calculations should be carried out in accordance with the

following:

1.The draughts are to be varied between light ballast and scantling draft.

2.Consumables including but not restricted to fuel oil, diesel oil and fresh watercorresponding to 97%, 50% and 10% content should be considered.

3.For each draught and variation of consumables, the available deadweight is tocomprise ballast water and cargo, such that combinations between maximumballast and minimum cargo and vice-versa, are covered. In all cases thenumber of ballast and cargo tanks loaded should be chosen to reflect the worstcombination of VCG and free surface effects. Operational limits on the numberof tanks considered to be simultaneously slack and exclusion of specific tanksare not permitted. All ballast tanks are to have at least 1% content.

4.Cargo densities between the lowest and highest intended to be carried shouldbe considered.

5.Sufficient steps between all limits should be examined to ensure that the worstconditions are identified. A minimum of 20 steps for the range of cargo andballast content, between 1% and 99% of total capacity, should be examined.More closely spaced steps near critical parts of the range may be necessary.

At every stage the criteria described in MARPOL Reg. I/25A paragraph 2 are tobe met.

MPC11cont

MPC 11

IACS Int. 200411-3

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MPC 12

Annex VI of MARPOL 73/78Regulation 1

Application

Regulation 1 reads as follows:

The provisions of this Annex shall apply to all ships, except where expressly providedotherwise in regulations 3, 5, 6, 13, 15, 18 and 19 of this Annex.

Interpretation:

For application of this regulation the term all ships shall be interpreted as applicable to allships (as defined by MARPOL 73 Article 2 (4)).(MEPC/Circ. 473)

MPC

12

(July 2004)(Rev.1Mar 2006)

IACS Int. 2004/Rev.1 200612-1

Note:

1. This UI is to be uniformly implemented by IACS Societies from 19 May 2005.

2. Revision 1 of this UI is to be uniformly implemented by IACS Societies from

1 July 2006.


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Annex VI of MARPOL 73/78

Regulation 2 (4)

Ozone depleting substances

Regulation 2 (4) reads as follows:

New installations, in relation to Regulation 12 of this Annex, means the installation of systems,equipment, including new portable fire extinguishing units, insulation, or other material on aship after the date on which this Annex enters into force, but excludes repair or recharge ofpreviously installed systems, equipment, insulation, or other material, or recharge of portablefire extinguishing units.

Interpretation:

For application of this regulation the term new installations shall be interpreted as follows:

(a) For new ships, installations on board ships the keels of which are laid or which are at asimilar stage of construction on or after 19 May 2005.

(b) For existing ships, new installations with a contractual delivery date to the ship on orafter the entry into force date or, in the absence of a contractual delivery date, the actual

delivery of the equipment to the ship on or after 19 May 2005.

The same interpretation shall apply with regard to new HCFC installations but with thesubstitution of 1 January 2020 in place of the 19 May 2005.(MEPC/Circ. 473)

MPC 13

IACS Int. 2004/Rev.1 200613-1

Note:



1 July 2006.

MPC

13

(July 2004)(Rev.1Mar 2006)


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Annex VI of MARPOL 73/78Regulation 1 / Regulation 5Application / Surveys and Inspections

Regulation 1 reads as follows:

The provisions of this Annex shall apply to all ships, except where expressly providedotherwise in regulations 3, 5, 6, 13, 15, 18 and 19 of this Annex.


In the case of ships of less than 400 gross tonnage, the Administration may establish

appropriate measures in order to ensure that the applicable provisions of this Annex arecomplied with.

Interpretation:

It shall be interpreted that all marine diesel engines over 130 kW except those exempted byRegulation 13 and Regulation 19 are to comply with the Regulation 13 limit regardless of thegross tonnage of the ship onto which the engine is installed. In this context such engines musthave an approved Technical File and must be issued with an EIAPP certificate in accordancewith the NOx Technical Code in all cases.

However the application of the ship surveys as given in Regulation 5 to ships under 400 GTwould be at the discretion of the relevant Administration.

MPC 14

IACS Int. 200414-1

v v

Note:

This UI is to be uniformly implemented by IACS Societies from 19 May 2005.

MPC14(July 2004)


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Annex VI of MARPOL 73/78Regulation 9 (4) (b)

Regulation 9

Duration and validity of Certificate

Regulation 9 (4) (b) reads as follows:

An International Air Pollution Prevention Certificate shall cease to be valid if significantalterations have taken place to the equipment, systems, fittings, arrangements or material towhich this Annex applies without the express approval of the Administration, except the directreplacement of such equipment or fittings with equipment or fittings that conform with the

requirements of this Annex. For the purpose of Regulation 13, significant alteration shallinclude any change or adjustment to the system, fittings, or arrangement of a diesel enginewhich results in the nitrogen oxide limits applied to that engine no longer being complied with.

Interpretation:

For application of this regulation the term significant alteration shall be interpreted as relatingto a change that is outside the scope of the approved Technical File. Any such changes are to beapproved as part of the existing Engine Group / Engine Family or, if that is not possible, a newEngine Group / Engine Family shall be established.

MPC 15

IACS Int. 2004

15-1

vv

MPC15(July 2004)

Note:



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Annex VI of MARPOL 73/78Regulation 13 (1) (a) (i)

Regulation 13 Nitrogen oxides (NOx )

Regulation 13 (1) (a) (i) reads as follows:

This regulation shall apply to each diesel engine with a power output of more than 130kWwhich is installed on a ship constructed on or after 1 January 2000.

Interpretation:

For application of this regulation it shall be interpreted that the term installed relates to anengine that is permanently secured or connected to the ships structure, fuel / coolant / exhaustsystems or power systems.

MPC 16

IACS Int. 200416-1

vv

MPC16(July 2004)

Note:



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Annex VI of MARPOL 73/78Regulation 13 (1) (a) (ii)


Regulation 13 (1) (a) (ii) reads as follows:

This regulation shall apply to each diesel engine with a power output of more than 130kWwhich undergoes a major conversion on or after 1 January 2000.

Interpretation:

For application of this regulation the date of commencement of the major conversion shall bethat detailed in the contract for conversion or, in the absence of a contractual commencementdate, the actual date the engine was made unavailable for normal operational service accordingto the ships log.

MPC 17

IACS Int. 200417-1

vv

MPC17(July 2004)

Note:



24/129

Annex VI of MARPOL 73/78Regulation 13 (1) (b) (i)


Regulation 13 (1) (b) (i) reads as follows:

This regulation does not apply to emergency diesel engines, engines installed in lifeboats andany device or equipment intended to be used solely in case of emergency.

Interpretation:

Regulation 13 does not apply to an engine which is used solely in response to emergencies onthe ship on which the engine is installed.(MEPC/Circ. 473)

MPC 18

IACS Int. 2004/Rev.1 200618-1

MPC

18

(July 2004)(Rev.1Mar 2006)

Note:



1 July 2006.


25/129

Annex VI of MARPOL 73/78Regulation 13 (1) (c)


Regulation 13 (1) (c) reads as follows:

Notwithstanding the provisions of sub-paragraph (a) of this paragraph, the Administration mayallow exclusion from the application of this regulation to any diesel engine which is installedon a ship constructed, or on a ship which undergoes a major conversion, before the entry intoforce of the present Protocol, provided that the ship is solely engaged in voyages to ports oroffshore terminals within the State of the flag of which the ship is entitled to fly.

Interpretation:

For application of this regulation the term on a ship which undergoes a major conversion,shall be interpreted as an error inserting the concept of ship in place of engine, shipconversion is not given elsewhere within the Annex. In order to be consistent with regulation13 (1) (a) (i) & (ii) this shall be read as or engine which undergoes a major conversion.

MPC 19

IACS Int. 200419-1

v v

MPC19(July 2004)

Note:



26/129

Annex VI of MARPOL 73/78Regulation 13 (2) (a) (i)


Regulation 13 (2) (a) (i) reads as follows:

For the purpose of this regulation, major conversion means a modification of an engine wherethe engine is replaced by a new engine built on or after 1 January 2000.

Interpretation:

This section shall be interpreted as follows:

(a) For application of this regulation the term replaced shall be interpreted as beingapplicable to an engine installed either as a direct replacement for an existing engine orone installed as an addition to the original engine complement as at 1 January 2000 tomeet revised ship requirements; and,

(b) For application of this regulation the term new shall be interpreted as applying toengines that left the manufacturers works for the first time on or after 1 January 2000.

MPC 20

IACS Int. 200420-1

v v

MPC20(July 2004)

Note:



27/129

Annex VI of MARPOL 73/78Regulation 13 (2) (a) (iii)


Regulation 13 (2) (a) (iii) reads as follows:

For the purpose of this regulation, major conversion means a modification of an engine wherethe maximum continuous rating of the engine is increased by more than 10%.

Interpretation:

For application of this regulation in the case of ships built before 1 January 2000 the term by

more than 10% shall be interpreted as applicable to the pre 1 January 2000 maximumcontinuous rating.(MEPC/Circ. 473)

MPC 21

IACS Int. 2004/Rev.1 200621-1

MPC

21

(July 2004)(Rev.1Mar 2006)

Note:



1 July 2006.


28/129

Annex VI of MARPOL 73/78Regulation 13 (3) (a)


Regulation 13 (3) (a) reads as follows:

Subject to the provision of regulation 3 of this Annex, the operation of each diesel engine towhich this regulation applies is prohibited, except when the emission of nitrogen oxides(calculated as the total weighted emission of NO2) from the engine is within the followinglimits:

(i) 17.0 g/kWh when n is less than 130 rpm

(ii) 45.0 x n(-0.2) g/kWh when n is 130 or more but less than 2000 rpm

(iii) 9.8 g/kWh when n is 2000 rpm or more

where n = rated engine speed (crankshaft revolutions per minute).

When using fuel composed of blends from hydrocarbons derived from petroleum refining, testprocedure and measurement methods shall be in accordance with the NOx Technical Code,taking into consideration the test cycles and weighting factors outlined in appendix II to thisAnnex.

Interpretation:

For application of this regulation it shall be interpreted that the limit and determined NO xvalues, in g/kWh for the appropriate application cycle, are to be given and compared to aprecision of one decimal place.

MPC 22

IACS Int. 200422-1

v v

MPC22(July 2004)

Note:



29/129

Annex VI of MARPOL 73/78Regulation 13 (3) (b)


Regulation 13 (3) (b) reads as follows:

Notwithstanding the provisions of sub-paragraph (a) of this paragraph, the operation of a dieselengine is permitted when:

(i) an exhaust gas cleaning system, approved by the Administration in accordance with theNOx Technical Code, is applied to the engine to reduce onboard NOx emissions at leastto the limits specified in sub-paragraph (a), or

(ii) any other equivalent method, approved by the Administration taking into accountrelevant guidelines to be developed by the Organization, is applied to reduce onboardNOx emissions at least to the limit specified in sub-paragraph (a) of this paragraph.

Interpretation:

For application of this sub part (i) of this regulation it shall be interpreted that approval inaccordance with the NOx Technical Code be on the basis of the complete assembly of engineand NOx reduction device. Consequently item 1.15 of the Supplement to EIAPP Certificate

shall give the actual NOx emission value (g/kWh) for the engine with the NOx reduction devicein operation.

MPC 23

IACS Int. 200423-1

v v

MPC23(July 2004)

Note:



30/129

Annex VI of MARPOL 73/78Regulation 14 (6)

Regulation 14 Sulphur oxides (SOx)


Those ships using separate fuel oils to comply with paragraph (4) (a) of this regulation shallallow sufficient time for the fuel oil service system to be fully flushed of all fuels exceeding1.5% m/m sulphur content prior to entry into a SOx emission control area. The volume of thelow sulphur fuel oils (less than or equal to 1.5% sulphur content) in each tank as well as the

date, time, and position of the ship when any fuel-changeover operation is completed, shall berecorded in such log-book as prescribed by the Administration.

Interpretation:

For application of this regulation the term prior to entry into a SOx emission control areashall, in accordance with the term when any fuel-changeover operation is completed, beinterpreted as a requirement to record the defined details in the log book also on exit from theSOx emission control area, prior to commencing change over.

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Regulation 16 (2) (a)

Regulation 16 Shipboard incineration

Regulation 16 (2) (a) reads as follows:

Except as provided in sub-paragraph (b) of this paragraph, each incinerator installed on board aship on or after 1 January 2000 shall meet the requirements contained in appendix IV to thisAnnex. Each incinerator shall be approved by the Administration taking into account thestandard specifications for shipboard incinerators developed by the Organisation*.

*Refer to resolution MEPC 76(40), Standard specification for shipboard incinerators.

Interpretation:

For application of this regulation the term installed on board a ship on or after 1 January 2000shall be interpreted as follows:

(a) For new ships, installations on board ships the keels of which are laid or which are at asimilar stage of construction on or after 1 January 2000.

(b) For existing ships, new installations with a contractual delivery date to the ship on orafter 1 January 2000 or, in the absence of a contractual delivery date, the actual deliveryof the equipment to the ship on or after 1 January 2000.

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Shipboard incineration of polyvinyl chlorides (PVCs) shall be prohibited, except in shipboardincinerators for which IMO Type Approval Certificates have been issued.

Interpretation:

For application of this regulation it shall be interpreted as applicable to incinerators meetingeither MEPC 59(33) or MEPC 76(40) specifications.

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All ships with incinerators subject to this regulation shall possess a manufacturers operatingmanual which shall specify how to operate the incinerator within the limits described inparagraph 2 of appendix IV to this Annex.

Interpretation:

For application of this regulation it shall be interpreted that possession of an operating manualis applicable only to MEPC 76(40) incinerators installed on or after 1 January 2000.

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Deleted in Dec. 2005

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Regulation 18 Fuel oil quality


For each ship subject to regulations 5 and 6 of this Annex, details of fuel oil for combustionpurposes delivered to and used on board shall be recorded by means of a bunker delivery notewhich shall contain at least the information specified in appendix V to this Annex.

Interpretation:

For application of this regulation it shall be interpreted as applicable to all ships of 400 grosstonnage or above and, at the Administrations discretion, for ships of less than 400 grosstonnage.

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Resolution 2 of the 1997 MARPOL ConferenceTechnical Code on Control of Emission ofNitrogen Oxides from Marine Diesel EnginesTable 3 Symbols and subscripts for terms and variables used in the formulae for thetest-bed measurement methods

Table 3 gives:

Interpretation:

For application of the term ps it shall be interpreted that the dry atmospheric pressure isdetermined in accordance with the following formula:

It shall also be interpreted that the pa term be determined using a temperature value for theintake air measured at the same physical location as the measurements forpB andRa.

Interpretation:

For application of the term Ta it shall be interpreted that the temperature of the intake airtemperature is that determined at the engine / turbocharger intake suction filter.

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MPC30(July 2004)

Symbol Term Dimension

paSaturation vapour pressure of the engineintake air (in ISO 3046-1, 1995:psy = PSY,

test ambient vapour pressure)

kPa

pB

Total barometric pressure (in ISO 3046-1,

1995:px = PX, site ambient total pressure;

py = PY, test ambient total pressure)

kPa

ps Dry atmospheric pressure kPa

Ra Relative humidity of the intake air %

Ta Absolute temperature of the intake air K

p pR p

S Ba a

=

100


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Resolution 2 of the 1997 MARPOL Conference

Technical Code on Control of Emission ofNitrogen Oxides from Marine Diesel EnginesChapter 1.2.1

Chapter 1.2 Application

Chapter 1.2.1 reads as follows:

This Code applies to all diesel engines with a power output of more than 130 kW which areinstalled, or are designed and intended for installation, on board any ship subject to Annex VI,with the exception of those engines described in paragraph 1(b) of regulation 13. Regarding therequirements for survey and certification under regulation 5 of Annex VI, this Code addressesonly those requirements applicable to an engines compliance with the NOx emission limits.

Interpretation:

For application of this section the term installed shall be interpreted as per IACS UI MPCNos. 14, 16, 17 & 18.

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Resolution 2 of the 1997 MARPOL ConferenceTechnical Code on Control of Emission ofNitrogen Oxides from Marine Diesel Engines

Chapter 1.3.2.2

Chapter 1.3 Definitions

Chapter 1.3.2.2 reads as follows:

For engines installed on ships constructed before 1 January 2000, substantial modification

means any modification made to an engine which increases its existing emission characteristicsestablished by the simplified measurement method as described in 6.3 in excess of theallowances set out in 6.3.11. These changes include, but are not limited to, changes in itsoperations or in its technical parameters (e.g., changing camshafts, fuel injection systems, airsystems, combustion chamber configuration, or timing calibration of the engine).

Interpretation:

For application of this section it shall be interpreted that an increase in emissioncharacteristics relates to an increase in the application average cycle weighted NOx emissionvalue.

Furthermore it shall also be interpreted that any modification made on or after 1 January 2000to such an engine involving alternative duty cycle, rating, components or settings that wereavailable, but not necessarily utilised, prior to 1 January 2000 shall not be considered asrepresenting a substantial modification to that engine.

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Resolution 2 of the 1997 MARPOL ConferenceTechnical Code on Control of Emission ofNitrogen Oxides from Marine Diesel EnginesChapter 2.2.4

Chapter 2.2 Procedures for pre-certification of an Engine Group


There are engines which, due to their size, construction and delivery schedule, cannot be pre-

certified on a test-bed. In such cases, the engine manufacturer, shipowner or ship builder shallmake application to the Administration requesting an on-board test (see 2.1.2.2). The applicantmust demonstrate to the Administration that the on-board test fully meets all of therequirements of a test-bed procedure as specified in chapter 5 of this Code. Such a survey maybe accepted for one engine or for an engine group represented by the parent engine only, but itshall not be accepted for an engine family certification. In no case shall an allowance begranted for possible deviations of measurements if an initial survey is carried on board a shipwithout any valid pre-certification test.

Interpretation:

For engines undergoing an on-board certification test, to be issued with an EIAPP Certificate,the same procedure apply as if the engine had been pre-certified on a test-bed:

(a) the survey on-board meets the pre-certification survey requirements; and

(b) the on-board test fully meets all of the requirements of a test-bed procedure as specifiedin chapter 5 of the NOx Technical Code; and

(c) the application average weighted NOx emission value meets the requirements ofRegulation 13 of Annex VI;and

(d) the engine has an approved Technical File.

(MEPC/Circ. 473)

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Chapter 2.2.5


Chapter 2.2.5 reads as follows:If the pre-certification test results show that an engine fails to meet the NOx emission limits asrequired by regulation 13 of Annex VI, a NOxreducing device may be installed. This device,when installed on the engine, must be recognised as an essential component of the engine andits presence will be recorded in the engines technical file. To receive an EIAPP Certificate forthis assembly, the engine, including the reducing device, as installed, must be re-tested to showcompliance with the NOx emission limits. However, in this case, the assembly may be retestedin accordance with the simplified measurement method addressed in 6.3. The NOxreducingdevice shall be included on the EIAPP Certificate together with all other records requested by

the Administration. The engines technical file shall also contain on-board NOx verificationprocedures for the device to ensure it is operating correctly.

Interpretation:


(a) An engine does not need to be shown, at the pre-certification survey, to fail to meet theRegulation 13 NOx emission limit requirements before a NOx reducing device isinstalled. Where it is intended from the outset that a NOx reducing device is to be fittedin accordance with Regulation 13(3)(b)(i) then the whole assembly shall be tested inaccordance with the requirements of the test bed procedure as specified in Chapter 5.

In those cases where it is proposed that the engine with a NOx-reducing device is to betested onboard to demonstrate compliance, as a Parent Engine + device therequirements of 2.2.4 shall apply.

(b) Where the pre-certification test of an engine, undertaken in accordance with Chapter 5,shows that a NOx reducing device would need to be fitted in order to meet theRegulation 13 NOx emission limit requirements, and the whole assembly is subsequentlyretested in accordance with the simplified measurement method, the test reports fromboth the engine pre-certification test and the subsequent simplified measurement methodtest shall be included in the Technical File.

Where the simplified measurement method is used to verify that the whole assemblymeets the Regulation 13 NOx emission limit requirements the allowances as given under

6.3.11 shall not be granted.

(c) In cases (a) and (b) the approval is on the basis of the complete assembly of engine andNOx reduction device. Consequently Item 1.15 of the Supplement to EIAPP Certificateshall give the actual NOx emission value (g/kWh) for the engine with the NOx reductiondevice in operation.

(d) The efficiency of the NOxreducing device (as demonstrated) shall be considered asunique to the Engine Group as tested and therefore non-transferable. Hence should thesame NOx reducing device be used for another Engine Group the whole assemblage(engine + NOx reducing device) shall be tested. An after-treatment device shall not becertified independent of the engine to which it is to be coupled.

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A flow chart providing guidance for compliance with the requirements of a pre-certificationsurvey for marine diesel engines intended for installation on board of ships is provided in figure

1 of appendix 2 of this Code.

Interpretation:

The text in chapter 2 gives the certification procedures which shall be followed. Wherediscepancies exists with figure 1, the text of chapter 2 takes precedence.(MEPC/Circ. 473)

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Technical Code on Control of Emission ofNitrogen Oxides from Marine Diesel EnginesChapter 2.2.9



A model form of an EIAPP Certificate is attached as appendix 1 to this Code.

Interpretation:

The model form Supplement to Engine International Air Pollution Prevention Certificateparticulars indicated below shall be interpreted as follows:

(a) 1.12 Specification(s) of test fuel

The particular ISO 8217 grade specification applicable to the fuel oil used at the relevantParent Engine test (i.e. DMA, DMB, DMC) shall be given on all (Parent and MemberEngine) EIAPP Certificates within that Engine Group / Engine Family.

(b) 1.14 Applicable NOx emission limit (g/kWh) (regulation 13 of Annex VI)

The limit value given here shall be the limit value for the Engine Group / Engine Familybased on the highest engine speed to be included in that Engine Group / Engine Family(in accordance with Regulation 13(3)(a)), irrespective of the rated speed of the ParentEngine or the rated speed of the particular engine as given on the EIAPP Certificate.

(c) 1.15 Engines actual NOx emission value (g/kW h)

The appropriate application average weighted NOx emission value(s) determined at theParent Engine test shall be given on all (Parent and Member Engine) EIAPP Certificates.In the case of an Engine Group / Engine Family which is approved to more than oneapplication cycle the Parent Engine value shall, as a minimum, be given for the particularapplication cycle applicable to the specific engine to which the EIAPP Certificate refers.

In those cases where the Technical File includes tolerances in respect of NOx emission

settings then the effect upon the as measured emission value of those tolerances shall bestated and the basis of the emission value, as stated under 1.15 of the EIAPP Certificate,be given. In no cases shall the effect tolerances be such as to exceed the limit value asstated under 1.14 of the EIAPP Certificate.

Where the installation includes a NOxreducing device the actual NOx emission value(g/kWh) for the engine with the NOx reduction device in operation shall be given.

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Chapter 2.3 Procedures for certification of an engine


The shipowner shall have the option of direct measurement of NOx emissions during engine

operation. Such data may take the form of spot checks logged with other engine operating dataon a regular basis and over the full range of engine operation or may result from continuousmonitoring and data storage. Data must be current (taken within the last 30 days) and must havebeen acquired using the test procedures cited in this NOx Technical Code. These monitoringrecords shall be kept on board for three months for verification purposes by the Parties to theProtocol of 1997. Data shall also be corrected for ambient conditions and fuel specification, andmeasuring equipment must be checked for correct calibration and operation, in accordance withthe procedures specified by the measurement equipment manufacturer in the engines technicalfile. Where exhaust gas after-treatment devices are fitted which influence the NOx emissions,the measuring point(s) must be located downstream of such devices.

Interpretation:

For application of this section it shall be interpreted that any system or procedure utilised tomonitor engine NOx emissions by the direct measurement method shall meet the requirementsof MEPC Resolution 103(49) Guidelines for On-board NOx Verification Procedure DirectMeasurement and Monitoring Method.

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Resolution 2 of the 1997 MARPOLConference Technical Code on Control ofEmission of Nitrogen Oxides from MarineDiesel Engines

Chapter 2.3.5



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

Interpretation:

For application of this section it shall be interpreted that sufficient data shall be collected by thedirect measurement method to enable the weighted average NOx emissions to be determined inaccordance with MEPC Resolution 103(49) Guidelines for On-board NOxVerificationProcedure Direct Measurement and Monitoring Method.

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Every marine diesel engine installed on board a ship shall be provided with a technical file. Thetechnical 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 shallcontain information as specified in 2.4.1.

Interpretation:

For application of this section it shall be interpreted that the term engine manufacturer is theentity which applied for the engine certification.(MEPC/Circ. 473)

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Chapter 2.3.11



If any adjustment or modification is made which is outside the approved limits documented in

the technical file, the IAPP Certificate may be issued only if the overall NO x emissionperformance is verified to be within the required limits by: a direct on-board NOx monitoring,as approved by the Administration; a simplified on-board NOx measurement; or, reference tothe test-bed testing for the relevant engine group approval showing that the adjustments ormodifications do not exceed the NOx emission limits.

Interpretation:


(a) Verification by the direct on-board NOx monitoring method is only applicable to the re-

issue of IAPP Certificates at periodical surveys or their endorsement at intermediate /annual surveys.

(b) The demonstration of compliance in accordance with either direct on-board NOxmonitoring or simplified on-board NOx measurement does not establish a new EngineGroup but does define the on-board verification procedure to be used thereafter to verifycontinuing compliance for that particular engine.

In these instances it shall be understood that the Parent Engine emission value, as givenin the EIAPP Certificate, thereafter only relates to the condition of that engine at the Pre-certification Survey stage.

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The Administration may, at its own discretion, abbreviate or reduce all parts of the survey onboard, in accordance with this Code, to an engine which has been issued an EIAPP Certificate.

However, the entire survey on board must be completed for at least one cylinder and/or oneengine in an engine family or engine group, or spare part, if applicable, and the abbreviationmay be made only if all the other cylinders and/or engines or spare parts are expected toperform in the same manner as the surveyed engine and/or cylinder or spare part.

Interpretation:

For application of this section it shall be interpreted that a physical verification must becompleted prior to the issue or endorsement of an IAPP Certificate. This verification may becompleted on a spare part representative of the working component (at the Administrationsdiscretion) but such a component must be suitably defined in the Technical File on-board NOxverification procedures.

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Flow charts providing guidance for compliance with the requirements of an initial, periodicaland 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.

Interpretation:


The text in chapter 2 gives the certification procedures which shall be followed. Wherediscrepancies exists with figure 2 and 3, the text of chapter 2 takes precedence.(MEPC/Circ. 473)

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Resolution 2 of the 1997 MARPOL ConferenceTechnical Code on Control of Emission ofNitrogen Oxides from Marine Diesel EnginesChapter 2.4.1.5

Chapter 2.4 Technical file and on-board NOx verification procedures


To enable an Administration to perform the engine surveys described in 2.1, the technical filerequired by 2.3.6 shall, at a minimum, contain a copy of the test report required in 5.10.

Interpretation:

For application of this section it shall be interpreted that:

(a) The copy of the test report to be included in the Technical File of every engine shallprovide, as a minimum, the data necessary to verify the relevant Parent Engines actualNOx emission value as detailed under item 1.15 of the EIAPP Certificate; and,

(b) In those cases where the Engine Group / Engine Family is certified for more than oneapplication cycle the Technical File is to include, as a minimum, the Parent Engine Testreport(s) for those duty cycles for which the particular engine is certified as given on

the engines EIAPP Certificate and detailed under items 1.9, 1.14 and 1.15 of theSupplement to the EIAPP Certificate.

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To enable an Administration to perform the engine surveys described in 2.1, the technical filerequired by 2.3.6 shall, at a minimum, contain the specifications of those spare

parts/components which, when used in the engine, according to those specifications, will resultin continued compliance of the engine with the NOx emission limits.

Interpretation:

For application of this section the term according to those specifications shall be interpretedas follows:

(a) It is considered that in this context specification may be read as identification markingand as such the identification of a NOx influencing component by a manufacturers partnumber or specific marking scheme would be sufficient.

In such instances the identification marking would be tied to a particular drawing orother data defining the features of that component with regard to its influence on NOxformation in the combustion process. Those drawings or other data shall form part of theconformity of production procedures as required under Chapter 4.

(b) The specification need only address those aspects of the design of the componentwhich directly affect its function as a NOx critical component. For some components itmay be possible to define these components by means of an outline dimensioned drawingwithin the conformity of production procedures or as a drawing directly included withinthe Technical File.

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Chapter 2.4.2



To ensure that engines are in compliance with regulation 13 of Annex VI after installation, each

engine with an EIAPP Certificate shall be checked at least once prior to issuance of the IAPPCertificate. Such check can be done using the on-board NOx verification procedures specifiedin the engines technical file or one of the other methods if the owner s representative does notwish to check using the on-board NOx verification procedures.

Interpretation:

For application of this section it shall be interpreted that, prior to the issuance of an IAPPCertificate, compliance after installation can only be verified by using an on-board NOxverification procedure approved by the Administration for that particular engine.

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On-board NOx verification procedures shall be determined by using the direct measurement andmonitoring method in accordance with 2.3.4, 2.3.5, 2.3.7, 2.3.8, 2.3.11, and 5.5.

Interpretation:

For application of this section it shall be interpreted that the on-board NOx verificationprocedures have been approved by the Administration taking into account MEPC Resolution103(49) the Guidelines for On-board NOx Verification Procedure Direct Measurement andMonitoring Method.

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When a NOx monitoring and recording device is specified as on-board NOx verificationprocedures, such device shall be approved by the Administration based on guidelines to be

developed by the Organization. These guidelines shall include, but are not limited to, thefollowing items:

.1 a definition of continuous NOx monitoring, taking into account both steady-state andtransitional operations of the engine;

.2 data recording, processing and retention;

.3 a specification for the equipment to ensure that its reliability is maintained duringservice;

.4 a specification for environmental testing of the device;

.5 a specification for the testing of the equipment to demonstrate that it has a suitable

accuracy, repeatability and cross sensitivity compared with the applicable sections of thisCode; and

.6 the form of the approval certificate to be issued by the Administration.

Interpretation:

For application of this section it shall be interpreted that MEPC Resolution 103(49) Guidelinesfor On-board NOx Verification Procedure Direct Measurement and Monitoring Methoddefines the guidelines as developed by the Organization.

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Chapter 3.1 Maximum allowable NOx emission limits for marine diesel engines


The graph in figure 1 represents the maximum allowable NOx emission limit values based on

the formulae included in paragraph 3(a) of regulation 13 of Annex VI. The total weighted NOxemissions, as measured and calculated in accordance with the procedures in this Code, shall beequal to or less than the applicable value from the graph corresponding to the rated speed of theengine.

Interpretation:

For application of this section (in accordance with the Unified Interpretation of Regulation 13(3) (a)) that precision to one decimal place shall be applied when comparing the determinedfinal weighted NOx values (g/kWh) with the applicable limit determined in accordance with theformulae given under paragraph 3(a) of regulation 13 of Annex VI.

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Chapter 3.1.3

Chapter 3.1 Maximum allowable NOx emission limits for marine diesel engines


An engines applicable exhaust emissions limit value from figure 1 and the actual calculated

exhaust emissions value for the engine shall be stated on the engines EIAPP Certificate.

Interpretation:

For application of this section it shall be interpreted (in accordance with the UnifiedInterpretation of Regulation 13 (3) (a)) that the limit and determined NOx values in g/kWhstated on the EIAPP Certificate shall be given to the first decimal place.

Furthermore (in accordance with the Unified Interpretation of Chapter 2.2.9) it is the relevantapplication cycle(s) Parent Engine value(s) which must be stated on the engines EIAPPCertificate.

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Chapter 3.2 Test cycles and weighting factors to be applied


For every individual engine or parent engine of an engine group or family, one of the test cyclesspecified in 3.2.2 to 3.2.6 shall be applied for verification of compliance with the NOx emission

limits in accordance with regulation 13 of Annex VI.

Interpretation:

For application of this section it shall be interpreted that:

(a) One of the test cycles specified in Chapters 3.2.2 to 3.2.6, applicable to the application,shall be applied.

(b) Where more than one test cycle is to be applied the average cycle weighted NOxemission value (in g/kWh) for each cycle is to be stated on the EIAPP Certificate 1.15,together with the corresponding limit value, 1.14.

(c) A Parent Engine test for a particular duty cycle is to follow the appropriate test cycle. AParent Engine emission value shall not be constructed by, for example, adding datafrom one test to emission values taken from another test.

(d) In those instances where a constant speed engine as installed can be used either solely formain propulsion or auxiliary purposes, then that engine should be certified to both the E2and D2 cycles.

(e) Where a generator is also permanently fitted or coupled to main engine propulsionshafting then certification of that main engine using only the E2 or E3 cycle, asappropriate, is required.

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Chapter 3.2 Test cycles and weighting factors to be applied


For variable-pitch propeller sets, test cycle E2 shall be applied in accordance with table 1.

Table 1 Test cycle for Constant-speed main propulsion application (includingdiesel-electric drive and variable-pitch propeller installations)

Interpretation:

For application of the term variable-pitch propeller sets it shall be interpreted that the E2cycle is applicable to any propulsion engine coupled to a variable pitch propeller, irrespectiveof whether the system operates at constant speed or variable speeds.

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Speed 100% 100% 100% 100%

Test cycle type E2 Power 100% 75% 50% 25%

Weighting

factor0.2 0.5 0.15 0.15


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Chapter 4.1.2Chapter 4.1.3Chapter 4.1.4

Chapter 4 Approval for serially manufactured engines: engine family and engine groupconcepts

Chapter 4.1 General

Chapter 4.1.1 reads as follows:To avoid certification testing of every engine for compliance with the NOx emission limits, oneof two approval concepts may be adopted, namely the engine family or the engine groupconcept.

Chapter 4.1.2 reads as follows:The engine family concept may be applied to any series-produced engines which, through theirdesign, are proven to have similar NOx emission characteristics, are used as produced, and,during installation on board, require no adjustments or modifications which could adverselyaffect the NOx emissions.

Chapter 4.1.3 reads as follows:The engine group concept may be applied to a smaller series of engines produced for similarengine application and which require minor adjustments and modifications during installationor in service on board. These engines are normally large power engines for main propulsion.

Chapter 4.1.4 reads as follows:Initially the engine manufacturer may, at its discretion, determine whether engines should be

covered by the engine family or engine group concept. In general, the type of application shallbe based on whether the engines will be modified, and to what extent, after testing on a test-bed.

Interpretation:

The Engine Family concept shall be interpreted as applicable to mass produced small boreengines (generally high speed) that may, for design purposes, include adjustable features but aregenerally dispatched with the intent that no installation or in service setting modificationsare undertaken.

For marine engine applications the Engine Group concept shall be interpreted as applicable toany engine intended for main propulsion or auxiliary duties, where adjustment and modification

following installation (and through the service life of the engine) is considered routine.

For application of the Engine Family or Engine Group concepts it shall be interpreted thatengines within an Engine Family may have different cylinder bore and stroke dimensions(within the defined limits - see Chapter 4.3.8.2.3) and that engines within an Engine Groupconcept effectively have identical bore and stroke dimensions as a result of only one of theparameters defined under Chapter 4.4.5.2 being permitted to vary within the defined enginegroup.

An Onboard NOx Verification Procedure shall be included within the Technical Files of allengines irrespective of whether they are included within an Engine Family or Engine Group.

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Technical Code on Control of Emission ofNitrogen Oxides from Marine Diesel EnginesChapter 4.3.1Chapter 4.4.1

Chapter 4.3 Application of the engine family concept


The engine family concept provides the possibility of reducing the number of engines whichmust be submitted for approval testing, while providing safeguards that all engines within thefamily comply with the approval requirements. In the engine family concept, engines with

similar emission characteristics and design are represented by a parent engine within the family.

Chapter 4.4 Application of the engine group concept


These are engines used primarily for main propulsion. They normally require adjustment ormodification to suit the on-board operating conditions but which should not result in NO xemissions exceeding the limits in 3.1 of this Code.

Interpretation:

For application of these sections it shall be interpreted that where the measured performance ofa Member Engine to an Engine Family or Engine Group is fundamental to the verification thatthat member engine is operating within the parameters defined by the approved engine familyor group, then that performance data (emissions, engine performance, ambient conditions) andother necessary data shall have been obtained in accordance with NOx Technical Code Chapter5.

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Chapter 4.3.10.6

Chapter 4.4.8

Chapter 4.3 Application of the engine family conceptChapter 4.3.7 reads as follows:Before granting an engine family approval, the Administration shall take the necessarymeasures to verify that adequate arrangements have been made to ensure effective control ofthe conformity of production.

Chapter 4.3.10 Certification of an engine familyChapter 4.3.10 Certification of an engine familyChapter 4.3.10.6 reads as follows:Before granting an engine family approval for new, serially produced engines, theAdministration shall take the necessary measures to verify that adequate arrangements havebeen made to ensure effective control of the conformity of production. This requirement may

not be necessary for families established for the purpose of engine modifications on board afteran EIAPP Certificate has been issued.

Chapter 4.4 Certification of an engine groupChapter 4.4.8 Certification of an engine groupChapter 4.4.8 reads as follows:The requirements of 4.3.10 apply mutatis mutandis to this section.

Interpretation:For application of these sections it shall be interpreted that the conformity of productionscheme would need to demonstrate the following aspects:

(a) The connection between the NOx critical component part / ID numbers as proposed forthe Engine Family or Engine Group and the drawing numbers (and revision status ifapplicable) defining those components.

(b) The means by which the Administration will be able, at the time of a survey, to verifythat the drawings used for the production of the NOx critical components correspond tothe drawings established as defining the Engine Family or Engine Group.

(c) Drawing revision control arrangements. Where it is proposed by a manufacturer thatrevisions to the NOx critical component drawings defining an Engine Family or EngineGroup may be undertaken through the life of an engine, then the conformity ofproduction scheme would need to demonstrate the procedures to be adopted to cover thecases where revisions (a) will not, or (b) may affect NOx emissions. These proceduresshall cover drawing number allocation, effect on the identification markings on the NOx

critical components and the provision for providing the revised drawings to theAdministration responsible for the original Engine Family or Engine Group approval.

Where these revisions may affect the NOx emission

interpretations of the international convention of the prevention of pollutions from ships

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