IMO REPORT OF THE MARINE ENVIRONMENT PROTECTION COMMITTEE ON ITS FORTY-NINTH SESSION

Transcription

1 INTERNATIONAL MARITIME ORGANIZATION E IMO MARINE ENVIRONMENT PROTECTION COMMITTEE 49th session Agenda item 22 MEPC 49/22/Add.2 13 August 2003 Original: ENGLISH REPORT OF THE MARINE ENVIRONMENT PROTECTION COMMITTEE ON ITS FORTY-NINTH SESSION Attached are annexes 13 to 25 to the report of the Marine Environment Protection Committee on its forty-ninth session (MEPC 49/22). *** For reasons of economy, this document is printed in a limited number. Delegates are kindly asked to bring their copies to meetings and not to request additional copies.

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3 ANNEX 13 RESOLUTION MEPC.107(49) Adopted on 18 July 2003 REVISED GUIDELINES AND SPECIFICATIONS FOR POLLUTION PREVENTION EQUIPMENT FOR MACHINERY SPACE BILGES OF SHIPS THE MARINE ENVIRONMENT PROTECTION COMMITTEE, RECALLING Article 38(a) of the Convention on the International Maritime Organization concerning the functions of the Committee, NOTING resolution MEPC.60(33) adopted on 30 October 1992 by which the Marine Environment Protection Committee adopted, at its thirty-third session, the revised Guidelines and Specifications for Pollution Prevention Equipment for Machinery Space Bilges of Ships and invited Governments to adopt and apply them to the maximum possible extent which they found reasonable and practicable and to report to the Organization the results of such application, NOTING FURTHER the provisions of regulation 16(5) of Annex I of the International Convention for the Prevention of Pollution from Ships, 1973, as modified by the Protocol of 1978 thereto (MARPOL 73/78), in which reference is made to the above-mentioned specifications, RECOGNIZING the advancement of technology, as well as the amendments to Annex I of MARPOL 73/78 on its operational discharge requirements which were adopted by the Marine Environment Protection Committee in 1992 and which entered into force on 6 July 1993, HAVING CONSIDERED, at its forty-ninth session, the Revised Guidelines and Specifications developed by the Sub-Committee on Ship Design and Equipment in the light of the requirements of Annex I of MARPOL 73/78, 1. ADOPTS the Revised Guidelines and Specifications for Pollution Prevention Equipment for Machinery Space Bilges of Ships, the text of which is set out in the annex to this resolution, which supersedes the recommendations contained in resolution MEPC.60(33); 2. INVITES Governments to: (a) (b) implement the Revised Guidelines and Specifications and apply them so that all equipment installed on board on or after 1 January 2005 meets these Revised Guidelines and Specifications in so far as is reasonable and practicable; and provide the Organization with information on experiences gained from their application and, in particular, on successful testing of equipment against the Specifications;

4 ANNEX 13 Page 2 3. REQUESTS the Secretariat, on the basis of information received, to maintain and update a list of approved equipment and to circulate it once a year to Governments; and 4. FURTHER INVITES Governments to issue an appropriate Certificate of type approval as referred to in paragraph of the Specifications and to recognize such certificates issued under the authority of other Governments as having the same validity as certificates issued by them.

5 ANNEX 13 Page 3 ANNEX REVISED GUIDELINES AND SPECIFICATIONS FOR POLLUTION PREVENTION EQUIPMENT FOR MACHINERY SPACES OF SHIPS TABLE OF CONTENTS 1 Introduction 2 Background 3 Definitions 4 Technical specifications 5 Specifications for type approval testing of pollution prevention equipment 6 Installation requirements ANNEX Part 1 - Test and performance specifications for type approval of 15 ppm bilge separators Part 2 - Test and performance specifications for type approval of 15 ppm bilge alarms Part 3 - Specifications for environmental testing for type approval of pollution prevention equipment Part 4 - Method for the determination of the oil content Part 5 - Documentation of approval APPENDIX 1 - Certificate of type approval for 15 ppm bilge separator APPENDIX 2 - Certificate of type approval for 15 ppm bilge alarm

6 ANNEX 13 Page 4 REVISED GUIDELINES AND SPECIFICATIONS FOR POLLUTION PREVENTION EQUIPMENT FOR MACHINERY SPACE BILGES OF SHIPS 1 INTRODUCTION 1.1 General The specifications in respect of 15 ppm Bilge Separators are considered to be applicable for use in conjunction with oily bilge-water and ballast water from fuel oil tanks, as these are of a low or medium capacity, and are conditioned by the need to avoid discharging oil mixtures with an oil content more than 15 ppm of the mixture It is recognized that the development and testing of high capacity separating equipment designed for dealing with effluent from cargo tanks on tankers pose special problems and such equipment does not require to be tested under these specifications. Such development and tests should not be hindered and Administrations should be prepared to accept deviations from these specifications when they are considered necessary in this context It should be understood that a 15 ppm Bilge Separator must be capable of handling any oily mixtures from the machinery space bilges and be expected to be effective over the complete range of oils which might be carried on board ship, and deal satisfactorily with oil of very high relative density, or with a mixture presented to it as an emulsion. Cleansing agents, emulsifiers, solvents or surfactants used for cleaning purposes may cause the bilge water to emulsify. Proper measures should be taken to minimize the presence of these substances in the bilges of a ship. With the possibility of emulsified bilge water always present the 15 ppm Bilge Separator must be capable of separating the oil from the emulsion to produce an effluent with an oil content not exceeding 15 ppm Where a range of 15 ppm Bilge Separators of the same design, but of different capacities, requires certification in accordance with these specifications, the Administration may accept tests in two capacities within the range, in lieu of tests on every size, providing that the two tests actually performed are from the lowest quarter and highest quarter of the range. Training Ship staff training should include familiarization in the operation and maintenance of the equipment. Maintenance The routine maintenance of the 15 ppm Bilge Separator and the 15 ppm Bilge Alarm system should be clearly defined by the manufacturer in the associated Operating and Maintenance Manuals. All routine and repair maintenance to be recorded Regulations referred to in these Guidelines and Specifications are those contained in Annex I of MARPOL 73/78.

7 ANNEX 13 Page Purpose These Guidelines and Specifications contain requirements regarding the design, installation, performance and testing of pollution prevention equipment required by regulation The purpose of these Guidelines and Specifications is:.1 to provide a uniform interpretation of the requirements of regulation 16;.2 to assist Administrations in determining appropriate design, construction and operational parameters for pollution prevention equipment when such equipment is fitted in ships flying the flag of their State;.3 to define test and performance requirements for pollution prevention equipment; and.4 to provide guidance for installation requirements. 1.3 Applicability These Guidelines and Specifications apply:.1 to installations fitted to ships, the keel of which are laid or which are at a similar stage of construction on or after 1 January 2005; and.2 to new installations fitted on or after 1 January 2005 to ships, the keel of which were laid or which were at a similar stage construction before 1 January 2005 in so far as is reasonable and practicable The Guidelines and Specifications adopted under resolutions A.393(X) and MEPC.60(33) are not applicable to ships to which these new Guidelines and Specifications apply Installations fitted to ships the keel of which were laid or which were at a similar stage of construction before 1 January 2005 should comply either:.1 with the Recommendation on International Performance and Test Specifications for Oily-Water Separating Equipment and Oil Content Meters adopted under resolution A.393(X), for equipment installed on board on or after 14 November 1978, as applicable; or.2 with the Guidelines and Specifications adopted under resolution MEPC.60(33), for pollution prevention equipment installed on board on or after 30 April 1994, as applicable; or with the requirements contained in these Guidelines and Specifications. 1.4 Summary of requirements The approval requirements for pollution prevention equipment specified in these Guidelines and Specifications are summarized below:

8 ANNEX 13 Page 6.1 the 15 ppm Bilge Separator should be tested for type approval in accordance with the procedures described in part 1 of the annex, subject to environmental tests specified in part 3 of the annex; and.2 the oil content meter for the 15 ppm Bilge Separator effluent discharge, hereinafter referred to as the 15 ppm Bilge Alarm should be tested for type approval in accordance with part 2 of the annex, subject to the environmental tests specified in part 3 of the annex. 2 BACKGROUND 2.1 The requirements of Annex I of MARPOL 73/78 relating to pollution prevention equipment for ships are set out in regulation 16, which stipulates that ships of 400 gross tonnage and above should be installed with approved equipment. 2.2 Regulation 16(5) stipulates that the oil content of the effluent from 15 ppm Bilge Separators should not exceed 15 ppm. The 15 ppm Bilge Alarm shall activate to indicate when this level cannot be maintained, and initiate automatic stop of overboard discharge of oily mixtures where applicable. 3 DEFINITIONS 3.1 Pollution prevention equipment For the purpose of these Guidelines and Specifications pollution prevention equipment installed in a ship in compliance with regulation 16 comprises:.1 15 ppm Bilge Separator;.2 15 ppm Bilge Alarm; and.3 automatic stopping device ppm Bilge Separator 15 ppm Bilge Separator may include any combinations of a separator, filter, coalescer or other means, and also a single unit designed to produce an effluent with oil content not exceeding 15 ppm ppm Bilge Alarm The alarm arrangements specified in regulation 16(5) are referred to in these Guidelines and Specifications as a 15 ppm Bilge Alarm. 3.4 ppm ppm means parts of oil per million parts of water by volume.

9 ANNEX 13 Page ppm display ppm display is a numerical scale display of the 15 ppm Bilge Alarm. 3.6 Automatic Stopping Device The automatic stopping device is a device used, where applicable, to automatically stop any discharge overboard of oily mixture when the oil content of the effluent exceeds 15 ppm. The automatic stopping device should consist of a valve arrangement installed in the effluent outlet line of the 15 ppm Bilge Separator which automatically diverts the effluent mixture from being discharged overboard back to the ship s bilges or bilge tank when the oil content of the effluent exceeds 15 ppm. 4 TECHNICAL SPECIFICATIONS ppm Bilge Separator The 15 ppm Bilge Separator should be strongly constructed and suitable for shipboard use, bearing in mind its intended location on the ship It should, if intended to be fitted in locations where flammable atmospheres may be present, comply with the relevant safety regulations for such spaces. Any electrical equipment which is part of the 15 ppm Bilge Separator should be based in a non-hazardous area, or should be certified by the Administration as safe for use in a hazardous area. Any moving parts which are fitted in hazardous areas should be arranged so as to avoid the formation of static electricity The 15 ppm Bilge Separator should be so designed that it functions automatically. However, fail-safe arrangements to avoid any discharge in case of malfunction should be provided Changing the feed to the 15 ppm Bilge Separator from bilge water to oil, bilge water to emulsified bilge water, or from oil and/or water to air should not result in the discharge overboard of any mixture containing more than 15 ppm of oil The system should require the minimum of attention to bring it into operation. In the case of equipment used for engine room bilges, there should be no need for any adjustment to valves and other equipment to bring the system into operation. The equipment should be capable of operating for at least 24 hours of normal duty without attention All working parts of the 15 ppm Bilge Separator which are liable to wear or to damage should be easily accessible for maintenance ppm Bilge Alarm These Specifications relate to 15 ppm Bilge Alarms The 15 ppm Bilge Alarm should resist corrosion in conditions of the marine environment The 15 ppm Bilge Alarm should, if intended to be fitted in locations where flammable atmosphere may be present, comply with the relevant safety regulations for such spaces. Any electrical equipment which is part of the 15 ppm Bilge Alarm should be placed in a

10 ANNEX 13 Page 8 non-hazardous area, or should be certified by the Administration as safe for use in a hazardous atmosphere. Any moving parts which are fitted in hazardous areas should be arranged so as to avoid the formation of static electricity The 15 ppm Bilge Alarm should not contain or use any substance of a dangerous nature, unless adequate arrangements, acceptable to the Administration, are provided to eliminate any hazards introduced thereby A ppm display should be provided. The ppm display should not be affected by emulsions and/or the type of oil given that the test fluid detailed in paragraph of part 1 of the annex is deemed to represent a mixture that may be expected in the machinery space bilges of a ship. It should not be necessary to calibrate the 15 ppm Bilge Alarm on board ship, but onboard testing according to the manufacturers instructions shall be permitted. The accuracy of the readings should at all times remain within the limit specified in paragraph of part 2 of the annex The response time of the 15 ppm Bilge Alarm, that is, the time which elapses between an alteration in the sample being supplied to the 15 ppm Bilge Alarm and the ppm display showing the correct response, should not exceed 5 seconds The 15 ppm Bilge Alarm should be fitted with an electrical/electronic device which should be pre-set by the manufacturer to activate when the effluent exceeds 15 ppm. This should also operate automatically if at any time the 15 ppm Bilge Alarm should fail to function, require a warm-up period or otherwise be de-energized It is recommended that a simple means be provided aboard ship to check on instrument drift, repeatability of the instrument reading, and the ability to re-zero the instrument The 15 ppm Bilge Alarm should record date, time and alarm status, and operating status of the 15 ppm Bilge Separator. The recording device should also store data for at least eighteen months and should be able to display or print a protocol for official inspections as required. In the event the 15 ppm Bilge Alarm is replaced, means should be provided to ensure the data recorded remains available on board for 18 months To avoid wilful manipulation of 15 ppm Bilge Alarms, the following items should be included:.1 every access of the 15 ppm Bilge Alarm beyond the essential requirements of paragraph requires the breaking of a seal; and.2 the 15 ppm Bilge Alarm should be so constructed that the alarm is always activated whenever clean water is used for cleaning or zeroing purposes The accuracy of the 15 ppm Bilge Alarms should be checked at IOPP Certificate renewal surveys according to the manufacturers instructions. Alternatively the unit may be replaced by a calibrated 15 ppm Bilge Alarm. The calibration certificate for the 15 ppm Bilge Alarm, certifying date of last calibration check, should be retained onboard for inspection purposes. The accuracy checks can only be done by the manufacturer or persons authorized by the manufacturer.

11 ANNEX 13 Page 9 5 SPECIFICATION FOR TYPE APPROVAL TESTING OF POLLUTION PREVENTION EQUIPMENT 5.1 Testing requirements The production model of pollution prevention equipment, for which the approval will apply, should be identical to the equipment, type-tested in accordance with the test and performance specifications contained in part 1 or 2 of the annex to these Guidelines and Specifications. The equipment should also be type-tested in accordance with the specifications for environmental testing contained in part 3 of the annex. 5.2 Approval and certification procedures Pollution prevention equipment which in every respect fulfils the requirements of these Guidelines and Specifications may be approved by the Administration for fitting on board ships. The approval should take the form of a certificate of type approval specifying the main particulars of the apparatus and any limiting conditions on its usage necessary to ensure its proper performance. Such certificate should be issued in the format shown in part 5 of the annex. A copy of the certificate of type approval for pollution prevention should be carried on board ships fitted with such equipment at all times A certificate of type approval for a 15 ppm Bilge Alarm should be issued and retained on board Approved pollution prevention equipment may be accepted by other countries for use on their vessels on the basis of the first trials, or after new tests carried out under the supervision of their own representatives. Should equipment pass a test in one country but fail a test of a similar nature in another country, then the two countries concerned should consult one another with a view to reaching a mutually acceptable agreement. 6 INSTALLATION REQUIREMENTS ppm Bilge Separator For future inspection purposes on board ship, a sampling point should be provided in a vertical section of the water effluent piping as close as is practicable to the 15 ppm Bilge Separator outlet. Re-circulating facilities should be provided, after and adjacent to the overboard outlet of the stopping device to enable the 15 ppm Bilge Separator system, including the 15 ppm Bilge Alarm and the automatic stopping device, to be tested with the overboard discharge closed (see figure 1). The re-circulating facility should be so configured as to prevent under all operating conditions any by-pass of the oily-water-separator The capacity of the supply pump should not exceed 110% of the rated capacity of the 15 ppm Bilge Separator with size of pump and motor to be stated on the Certificate of Type Approval The 15 ppm Bilge Separator should be fitted with a permanently attached plate giving any operational or installation limits considered necessary by the manufacturer or the Administration A vessel fitted with a 15 ppm Bilge Separator should, at all times, have on board a copy of the Operating and Maintenance manuals.

12 ANNEX 13 Page ppm Bilge Alarm The layout of the installation should be arranged so that the overall response time (including the response time of the 15 ppm Bilge Alarm) between an effluent discharge from the 15 ppm Bilge Separator exceeding 15 ppm, and the operation of the Automatic Stopping Device preventing overboard discharge, should be as short as possible and in any case not more than 20 s The arrangement on board ship for the extraction of samples from the 15 ppm Bilge Separator discharge line to the 15 ppm Bilge Alarm should give a truly representative sample of the effluent with an adequate pressure and flow A vessel fitted with a 15 ppm Bilge Alarm should, at all times, have on board a copy of the Operating and Maintenance manuals.

13 ANNEX 13 Page 11 ANNEX The annex provides detailed Test and Performance Specifications for pollution prevention equipment and contains: Part 1 - Test and Performance Specifications for Type Approval of 15 ppm Bilge Separators; Part 2 - Test and Performance Specifications for Type Approval of 15 ppm Bilge Alarms; Part 3 - Specification for Environmental Testing for Type Approval of pollution prevention equipment; Part 4 - Method for the Determination of Oil Content; and Part 5 - Documentation of Approval. PART 1 TEST AND PERFORMANCE SPECIFICATIONS FOR TYPE APPROVAL OF 15 PPM BILGE SEPARATORS 1.1 General These Test and Performance Specifications for Type Approval relate to 15 ppm Bilge Separators. In addition, the electrical and electronic systems of the 15 ppm Bilge Separator should be tested in accordance with the Specifications for Environmental Testing contained in part 3 of this annex The 15 ppm Bilge Separator being tested should comply with the relevant requirements of the technical specifications contained in section 4.1 of these Guidelines and Specifications. 1.2 Test Specifications These Specifications relate to 15 ppm Bilge Separators. 15 ppm Bilge Separators should be capable of producing an effluent for discharge to the sea containing not more than 15 ppm of oil irrespective of the oil content of the feed supplied to it The influent, whether emulsified or non-emulsified, which the system has in practice to deal with, depends on:.1 the position of the oil/water interface, with respect to the suction point, in the space being pumped;.2 the type of pump used;.3 the type and degree of closure of any control valve in the circuit; and.4 the general size and configuration of the system.

14 ANNEX 13 Page 12 Therefore the test rig must be so constructed as to include not only the 15 ppm Bilge Separator, but also the pumps, valves, pipes and fittings as shown in figure 2. It is to be so designed for testing 15 ppm Bilge Separators with and without an integral supply pump. - For the testing of 15 ppm Bilge Separators having no integral pump, the centrifugal pump A (figure 2) is used to feed the 15 ppm Bilge Separator with valves 4 and 6 open, and valve 5 closed. The rate of flow from the centrifugal pump "A" is matched to the design throughput of the 15 ppm Bilge Separator by the adjustment of the centrifugal pump s discharge valve. - Where the 15 ppm Bilge Separator is fitted with an integral pump, the centrifugal pump "A" is not required. - A centrifugal pump "B" should be fitted to re-circulate the Test Fluid C in the tank to ensure that the Test Fluid C is maintained in a stable condition throughout the testing. Re-circulation is not required for Test Fluids A and B. - To ensure a good mix of the Test Fluid and the water, a conditioning pipe as specified in paragraph of part 1 of this annex shall be fitted immediately before the 15 ppm Bilge Separator. - Other valves, flow meters and sample points should be fitted to the test rig as shown in figure 2. - The pipe work should be designed for a maximum liquid velocity of 3 metres/second. Water (clean water) RMG 35 DMA Test fluid Test fluid (Test fluid "A" A) (Test fluid B) "B" Sample point V2 V3 V8 V1 FM Flow meter FM V4 Test fluid "C" Sample point V5 P V6 Centrifugal pump A Centrifugal pump B P Auto. oil discharge valve V7 Conditioning 15 ppm Separated oil pipe Bilge Separator Observation window Sample point Sample point Effluent Figure 2 - Test rig

15 ANNEX 13 Page The tests should be carried out with a supply rate equal to the full throughput for which the 15 ppm Bilge Separator is designed Tests should be performed using three grades of test fluids.1 Test Fluid A which is a marine residual fuel oil in accordance with ISO 8217, type RMG 35 (density at 15 o C not less than 980 kg/m 3 ).2 Test Fluid "B" which is a marine distillate fuel oil in accordance with ISO 8217, type DMA (density at 15 o C not less than 830 kg/m 3 )..3 Test Fluid "C" which is a mixture of an oil-in-fresh water emulsion, in the ratio whereby 1 kg of the mixture consists of g of fresh water; g of Test Fluid A" g of Test Fluid B ; g surfactant (sodium salt of dodecylbenzene sulfonic acid) in the dry form; g iron oxides (The term iron oxide is used to describe black ferrosoferric oxide (Fe 3 O 4 ) with a particle size distribution of which 90% is less than 10 microns, the remainder having a maximum particle size of 100 microns); Note: Procedure for preparing Test Fluid C: (see example calculation) 1 - Preparation (1) measure out 1.2 times the quantity of surfactant required for the Test with Test Fluid C as described in ; and (2) mix it with fresh water and stir well in a small container (e.g., a beaker or bucket) to make a mixture ( Mixture D ) until the surfactant has been thoroughly dissolved. - To make Test Fluid C in the test fluid tank (figure 3), (3) Fill test fluid tank with fresh water with a quantity 1.2 times the volume of the total quantity of water in the test fluid C needed for the test described in Calculation of ingredients of Test Fluid C (Example: 2m 3 /h Bilge Separator). Operating period for the Test with Test Fluid C as per : 2.5 hours plus conditioning time (say 0.5hour) = 3 hours Net volume needed for the Test: Volume of test water: 2m 3 x 3 hours = 6m 3 Volume Test Fluid C : 6% of test water = 0.06 x 6m 3 = 0.36m 3 Actual Volume to be prepared: Volume of Test Fluid C to be prepared: 1.2 times of the net volume of Test Fluid C = 1.2 x 0.36 = 0.432m 3 Volume of fresh water in Test Fluid C : (947.8g/1000g) of Test Fluid C = x = m 3 Weight of Test Fluid A : (25g/1000g) of Test Fluid C =25/1000 x x 1000 = 10.8kg Weight of Test Fluid B : (25g/1000g) of Test Fluid C = 25/1000 x x 1000 = 10.8kg Weight of surfactant: (0.5g/1000g) of Test Fluid C = 0.5/1000 x x 1000 = 0.216kg Weight of iron oxide: (1.7g/1000g) of Test Fluid C )=1.7/1000 x x 1000 x 0.734kg

16 ANNEX 13 Page 14 (4) Operate centrifugal pump B running at a speed of not less than 3,000 rpm (nominal) with a flow rate at which the volume of the test fluid has been changed out at least once per minute. (5) Add Mixture D first, followed by oil and suspended solids (iron oxides) respectively, both 1.2 times of the required amounts, to the fresh water in the tank, (6) To establish a stable emulsion keep running the centrifugal pump B for one hour and confirm no oil floats on the surface of the test fluid. (7) After the one hour stated in paragraph (6) above keep running the centrifugal pump B at reduced speed to approximately 10% of original flow rate, until the end of the test. (1) Fresh water (2) Mixture D oils suspended solid D Outlet To 15ppm bilge separator H Inlet Centrifugal pump B Figure 3 - Tank of Test Fluid C Note: (1) The tank should be of a cylindrical shape. The level of the water should be: 2D > H > 0.5D, when preparing Test Fluid C. (2) Outlet going to centrifugal pump B should be placed at as low a position to the tank as possible. (3) Inlet to the tank should be fitted at the center of tank bottom so that the mixture flows upward to obtain uniform and stable emulsion. If the 15 ppm Bilge Separator is fitted with heating facilities to allow the separated oil retained in it to be discharged when the automatic discharge valve is activated, the Certificate of Type Approval should be endorsed under the heading Limiting Conditions Imposed with the following statement: The 15 ppm separator is fitted with heating facility.

17 ANNEX 13 Page If the 15 ppm Bilge Separator includes an integrated feed pump, this 15 ppm Bilge Separator should be tested with that pump supplying the required quantity of Test Fluid and water to the 15 ppm Bilge Separator at its rated capacity. If the 15 ppm Bilge Separator is to be fed by the ship s bilge pumps, then the unit will be tested by supplying the required quantity of Test Fluid and water mixture to the inlet of a centrifugal pump operating at not less that 1,000 rpm (see dotted line in figure 2). This pump should have a delivery capacity of not less than 1.1 times the rated capacity of the 15 ppm Bilge Separator at the delivery pressure required for the test. The variation in Test Fluid/water ratio will be obtained by adjusting valves on the Test Fluid and water suction pipes adjacent to the pump suction, and the flow rate of Test Fluid and water or the Test Fluid content of the supply to the 15 ppm Bilge Separator should be monitored. If a centrifugal pump is used, the excess pump capacity should be controlled by a throttle valve on the discharge side of the pump. In all cases, to ensure uniform conditions, the piping arrangements immediately prior to the 15 ppm Bilge Separator should be such that the influent to the 15 ppm Bilge Separator should have a Reynolds Number of not less than 10,000 as calculated in fresh water, a liquid velocity of not less than 1 metre per second and the length of the supply pipe from the point of Test Fluid injection to the 15 ppm Bilge Separator should have a length not less than 20 times its diameter. A mixture inlet sampling point and a thermometer pocket should be provided near the 15 ppm Bilge Separator inlet and an outlet sampling point and observation window should be provided on the discharge pipe In order to approach isokinetic sampling i.e. the sample enters the sampling pipe at stream velocity the sampling arrangement should be as shown in figure 4 and, if a cock is fitted, free flow should be effected for at least one minute before any sample is taken. The sampling points should be in pipes running vertically. Figure 4 Diagram of sampling arrangements A Distance A, not greater than 400 mm B Distance B, sufficient to insert sampling bottle C Dimension C, straight length should not be less than 60 mm D Dimension D, pipe thickness should not be greater than 2mm E Detail E, chisel-edged chamfer (30 o )

18 ANNEX 13 Page In the case of the 15 ppm Bilge Separator depending essentially on gravity, the feed to the system of the test water and Test Fluid mixture should be maintained at a temperature not greater than 40 o C, and heating and cooling coils should be provided where necessary. The water shall have a density of not more than 1,015 at 20 o C. In other forms of separation where the dependence of separation efficiency on temperature is not established, tests should be carried out over a range of influent temperatures representing the normal shipboard operating range of 10 o C to 40 o C or should be taken at a temperature in this range where the separation efficiency is known to be worst In those cases where, for the 15 ppm Bilge Separator, it is necessary to heat water up to a given temperature and to supply heat to maintain that temperature, the tests should be carried out at the given temperature The tests with Test Fluid A should be carried out as follows:.1 To ensure that the 15 ppm Bilge Separator commences the test with the oil section full of Test Fluid and with the supply line impregnated with Test Fluid, the 15 ppm Bilge Separator should, after filling with water (density at 20 o C not more than 1,015) and while in the operating condition, be fed with pure Test Fluid for not less than 5 min..2 The 15 ppm Bilge Separator should be fed with a mixture composed of between 5,000 and 10,000ppm of Test Fluid in water until steady conditions have been established. Steady conditions are assumed to be the conditions established after pumping through the 15 ppm Bilge Separator a quantity of Test Fluid/water mixture not less than twice the volume of the 15 ppm Bilge Separator. The test should then proceed for 30 min. Samples should be taken at the effluent outlet at 10 min and 20 min from the start of this period. At the end of this test, an air cock should be opened on the suction side of the pump and, if necessary, the oil and water valves should be slowly closed together, and a sample taken at the effluent discharge as the flow ceases (this point can be checked from the observation window)..3 A test identical to that described in , including the opening of the air cock, should be carried out with a mixture composed of approximately 25% * Test Fluid and 75% * water..4 The 15 ppm Bilge Separator should be fed with 100% * of Test Fluid for at least 5 min during which time the observation window should be checked for any oil discharge. Sufficient Test Fluid should be fed into the 15 ppm Bilge Separator to operate the automatic oil discharge valve. After the operation of the oil discharge valve, the test should be continued for 5 min using a 100% * Test Fluid supply in order to check the sufficiency of the oil discharge system..5 The 15 ppm Bilge Separator should be fed with water (density at 20 o C not more than 1,015) for 15 min. Samples of the separated water effluent are taken at the beginning of the test and after the first 10 min..6 A test lasting a minimum of 2 h should be carried out to check that the 15 ppm Bilge Separator will operate continuously and automatically. This trial should use a cycle varying progressively from water to oily mixture with approximately 25% * * Percentage of volume.

19 ANNEX 13 Page 17 Test Fluid content and back to water every 15 minutes, and should test adequately any automatic device which is fitted. The whole test sequence should be performed as a continuous programme. At the end of the test, while the 15 ppm Bilge Separator is being fed with 25% * Test Fluid, a water effluent sample should be taken for analysis The tests with Test Fluid B should be carried out as follows:.1 The 15 ppm Bilge Separator should be fed with a mixture composed of between 5,000 and 10,000ppm of Test Fluid in water until steady conditions have been established. Steady conditions are assumed to be the conditions established after pumping through the 15 ppm Bilge Separator a quantity of Test Fluid/water mixture not less than twice the volume of the 15 ppm Bilge Separator. The test should then proceed for 30 min. Samples should be taken at the effluent outlet at 10 min and 20 min from the start of this period. At the end of this test, an air cock should be opened on the suction side of the pump and, if necessary, the oil and water valves should be slowly closed together, and a sample taken at the effluent discharge as the flow ceases (this point can be checked from the observation window)..2 A test identical to that described in , including the opening of the air cock, should be carried out with a mixture composed of approximately 25% * Test Fluid and 75% * water The tests with Test Fluid C should be carried out as follows:.1 The 15 ppm Bilge Separator should be fed with a mixture composed of 6% Test Fluid C and 94% water to have emulsified oil content of 3,000 ppm in the test water until steady conditions have been established. Steady conditions are assumed to be the conditions established after pumping through the 15 ppm Bilge Separator a quantity of Test Fluid C /water mixture not less than twice the volume of the 15 ppm Bilge Separator..2 The test should then proceed for 2.5 h. Samples should be taken at the effluent outlet at 50 minutes and 100 minutes after conditioning. At the end of this test, an air cock should be opened on the suction side of the pump and, if necessary, the Test Fluid "C and water valves should be slowly closed together, and a sample taken at the effluent discharge as the flow ceases (this point can be checked from the observation window) Sampling should be carried out as shown in figure 4 so that the sample taken will suitably represent the fluid issuing from the effluent outlet of the 15 ppm Bilge Separator Samples should be taken in accordance with ISO :2000. The sample is to be extracted on the same day of collection, and be sealed and labelled in the presence of a representative of the national authority and arrangements should be made for analysis as soon as possible and in any case within seven days provided the samples are being kept between 2ºC and 6ºC at laboratories approved by the Administration The oil content of the samples should be determined in accordance with part 4 of the annex. * Percentage of volume.

20 ANNEX 13 Page When accurate and reliable oil content meters are fitted at inlet and outlet of the 15 ppm Bilge Separator, one sample at inlet and outlet taken during each test will be considered sufficient if they verify, to within + 10%, the meter readings noted at the same instant In the presentation of the results, the following data testing methods and readings should be reported:.1 Properties of test fluids A and B: - density at 15 o C; - kinematic viscosity 100 o C /40 o C); - flashpoint; - ash; and - water content;.2 Properties of test fluid C: - type of surfactant; - particle size percentage of the non soluble suspended solids; and - surfactant and iron oxide quality verification;.3 Properties of the water in the water tank: - density of water at 20ºC; and - details of any solid matter present;.4 Temperature at the inlet to the 15 ppm Bilge Separator;.5 A diagram of the test rig;.6 A diagram of the sampling arrangement; and.7 The method used in analysis of all samples taken and the results thereof, together with oil content meter readings, where appropriate. PART 2 - TEST AND PERFORMANCE SPECIFICATIONS FOR TYPE APPROVAL OF 15 PPM BILGE ALARMS 2.1 General These Test and Performance Specifications relate to 15 ppm Bilge Alarms. In addition, the electrical and electronic section of these systems should be in accordance with the Specifications for Environmental Testing contained in part 3 of this annex The 15 ppm Bilge Alarm being tested should comply with all the relevant requirements of the technical specifications contained in section 4.2 of these Guidelines and Specifications.

21 ANNEX 13 Page Test specifications For a 15 ppm Bilge Alarm, the accuracy should be within + 5 ppm. The accuracy of a 15 ppm Bilge Alarm should remain within the above limits despite the presence of contaminants other than oil, and the power supply varying by 10% from the design value i.e. in respect of electricity, compressed air, etc The sampling arrangement for the test rig should be such that a representative homogeneous sample is obtained under all conditions of operation and under all operational proportions of oil content. The sample should be obtained from the full flow through the 15 ppm Bilge Alarm, but when this is impracticable the sampling arrangements shown in figure 4 in part 1 should be used. Special care should be given to this stage of the process and the validity of the resultant findings During the various tests, the response time of the 15 ppm Bilge Alarm should be checked and it should be noted whether alarms operate adequately when a pre-stated threshold is exceeded A diagrammatic arrangement of a test facility for evaluating the performance of the 15 ppm Bilge Alarm is given in figure 5. The accuracy of the 15 ppm Bilge Alarm will be determined by comparing its readings against a known flow of Test Fluid injected into a known flow of water. The grab samples taken will be analysed in a laboratory by the methods specified in part 4 of this annex. The results of the laboratory analysis will be used for correction and to indicate sampling and test equipment variability. The water flow rate will be adjusted so that the entire Test Fluid-water flow passes through the 15 ppm Bilge Alarm, except the intermittent grab sample stream. Special care should be given to keep, continuously, a constant Test Fluid content in the water that flows into the 15 ppm Bilge Alarm. The metering pumps should be adjusted to deliver a nearly continuous quantity of Test Fluid. If Test Fluid injection becomes intermittent at low concentrations, the Test Fluid may be pre-mixed with water to provide continuous flow. The Test Fluid injection point should be immediately up-stream of the 15 ppm Bilge Alarm inlet to minimize time lags. Calibration test The 15 ppm Bilge Alarm will be calibrated and zeroed as per the manufacturer s instructions. It will then be tested with the three test fluids "A", "B" and "C", as specified in paragraph of part 1 of the annex, at the following oil concentrations in parts per million: 0, 15, and at the full scale of the meter. Each concentration test will last for 15 min. Following each concentration test, the 15 ppm Alarm will be run on oil-free water for 15 min and the reading noted. If it proves necessary to re-zero or re-calibrate the 15 ppm Bilge Alarm during this test, this fact will be noted.

22 ANNEX 13 Page 20 Contaminant and colour test Figure 5 - Diagrammatic arrangements of test facilities The 15 ppm Bilge Alarm should undergo contaminant and colour tests as follows:.1 the 15 ppm Bilge Alarm should be run on a mixture of clean water and 10 ppm Test Fluid B and reading noted;.2 the water supply should be changed from 10 ppm Test Fluid B and clean water to 10 ppm Test Fluid B and water contaminated with iron oxide in a concentration of 10 ppm;.3 any shift in the 15 ppm Bilge Alarm reading should be noted. The reading should be within the accuracy limits specified in paragraph 2.2.1;.4 the procedure specified in.2 and.3 above should be repeated with iron oxide concentrations of 50 ppm and 100 ppm respectively;.5 the 15 ppm Bilge Alarm should be run on a mixture of clean water and 10 ppm Test Fluid B and its reading noted;.6 the water supply should be changed from clean water to very salt water (a solution of 6% common salt with clean water);.7 any shift in the 15 ppm Bilge Alarm reading should be noted. The reading should be within the accuracy limits specified in paragraph 2.2.1; and.8 sufficient water should be available in the mixing tank to ensure an effective test of not less than 15 min.

23 ANNEX 13 Page 21 Sample pressure or flow test The 15 ppm Bilge Alarm should be run on a 15 ppm Test Fluid B sample. The water pressure or flow rate of the mixture should be adjusted from one half normal, normal and twice normal. Any effect of these changes on the 15 ppm Bilge Alarm ppm display reading should be noted and recorded on the Certificate. This test may require modification for 15 ppm Bilge Alarms with flow or pressure regulators or 15 ppm Bilge Alarms designed to discharge into an ambient pressure sump. Shut off tests The 15 ppm Bilge Alarm should be run on a 15 ppm Test Fluid B sample. The water and Test Fluid injection pumps should be shut off. The 15 ppm Bilge Alarm will be left turned on with no other changes made. After 8 hours, the water and Test Fluid injection pump should be turned on and set to provide the mixture of 15 ppm. The 15 ppm Bilge Alarm ppm display readings before and after each test and any damage to the 15 ppm Alarm should be noted and recorded on the Certificate. Utilities supply variation test If the 15 ppm Bilge Alarm requires any utilities besides electricity, it should be tested with these utilities at 110% and 90% of the design figures. Calibration and zero drift test The 15 ppm Bilge Alarm should be calibrated and zeroed. A 15 ppm Test Fluid B sample will run through the 15 ppm Bilge Alarm for eight hours and any calibration drift noted. Following this, the 15 ppm Bilge Alarm should run on oil-free water and any zero drift noted and recorded on the Certificate. During this test grab samples should be taken 0, 2, 4, 6, and 8 hours into the test schedule to verify any calibration drift. Response time test The response time is to be taken for the 15 ppm Bilge Alarm to give an alarm at 15 ppm oil concentration after the supply to the 15 ppm Bilge Alarm is changed from clean water to oily water having a concentration of more than 15 ppm oil A specification of the instrument concerned and a diagrammatic presentation of the test arrangements should be provided and the following data should be reported..1 types and properties of Test Fluids used in the tests (refer to part 1, paragraphs and of this annex);.2 details of contaminants used, in the form, for example, of a supplier s certificate or laboratory test protocol; and.3 results of tests and analysis of grab samples.

24 ANNEX 13 Page 22 PART 3 - SPECIFICATIONS FOR ENVIRONMENTAL TESTING FOR TYPE APPROVAL OF POLLUTION PREVENTION EQUIPMENT 3.1 General The specifications for environmental testing for type approval relate to the electrical and electronic sections of:.1 15 ppm Bilge Separator; and.2 15 ppm Bilge Alarm. The above-mentioned items, hereafter referred to as "equipment", when tested should comply with all the relevant requirements contained in section 5 of these Guidelines and Specifications. 3.2 Test specifications Testing requirements The electrical and electronic sections of the equipment in the standard production configuration should be subjected to the programme of environmental tests set out in this Specification at a laboratory approved for the purpose by the Administration or by the competent authority of the manufacturer s home country. A copy of the environmental test document, in a format similar to that specified in section 2 of part 5 of this annex, should be submitted to the Administration by the manufacturer, together with the application for type approval Test specification details Equipment should operate satisfactorily on completion of each of the following environmental tests:.1 Vibration tests:.1.1 a search should be made for resonance over the following range of frequency and amplitude of acceleration: to 13.2 Hz with an amplitude of + 1mm; and to 80 Hz with an acceleration of g. This search should be made in each of the three planes at a rate sufficiently low to permit detection of resonance;.1.2 the equipment should be vibrated in the planes at each major resonant frequency for a period of 2 hours;.1.3 if there is no resonant frequency, the equipment should be vibrated in each of the planes at 30 Hz with an acceleration of g for a period of 2 hours;.1.4 after completion of the tests specified in.1.2 or.1.3 of this paragraph a search should again be made for resonance and there should be no significant change in the vibration pattern.

25 ANNEX 13 Page 23.2 Temperature tests:.2.1 equipment that may be installed in an enclosed space that is environmentally controlled, including an engine-room, should be subjected, for a period of not less than 2 h, to: a low temperature test at 0 C; and a high temperature test at 55 C..3 Humidity tests: At the end of each of the tests referred to, the equipment should be switched on and it should function normally under the test conditions. Equipment should be left switched off for a period of 2 h at a temperature of 55ºC in an atmosphere with a relative humidity of 90%. At the end of this period the equipment should be switched on and should operate satisfactorily for 1 hour;.4 Inclination test: Equipment should operate satisfactorily at angles of inclination up to 22.5º in any plane from the normal operating position;.5 Reliability of electrical and electronic equipment: The electrical and electronic components of the equipment should be of a quality guaranteed by the manufacturer and suitable for their intended purpose. PART 4 METHOD FOR DETERMINATION OF OIL CONTENT Scope and application The International Standard ISO :2000 Water quality - Determination of hydrocarbon oil index Part 2: Method using solvent extraction and gas chromatography specifies a method for the sampling and subsequent determination of the hydrocarbon oil index in water using solvent extraction and gas chromatography. This method should be used for the determination of oil content requirements outlined in these Guidelines and Specification PART 5 DOCUMENTATION OF APPROVAL 5.1 Certificate of Type Approval for pollution prevention equipment Satisfactory compliance with all the test requirements enumerated in parts 1 and 2 of this annex should be shown in the Certificate of Type Approval issued by the Administration in the format specified in paragraph below. An Administration may issue a Certificate of Type Approval based on separate testing or on testing already carried out under supervision by another Administration.

26 ANNEX 13 Page A Certificate of Type Approval should be in the format shown in appendix 1 or 2 to this annex. The Certificate should identify the type and model of the pollution prevention equipment to which it applies and identify equipment assembly drawings, duly dated. Each drawing should bear the model specification numbers or equivalent identification details. The Certificate should include the full performance test protocol on which it is based. If a Certificate of Type Approval is issued by an Administration based on a Certificate previously issued by another Administration, the Certificate should identify the Administration which conducted the tests on the pollution prevention equipment and a copy of the original test results should be attached to it. 5.2 Format of environmental test protocol Satisfactory compliance with the environmental tests laid down in these Guidelines and Specifications, where applicable, should be shown on the environmental test protocol issued by the testing laboratory. The protocol should include at least the following details..1 identification of the equipment by type and drawing number, duly dated; and.2 a statement of the tests conducted on the equipment, including the results thereof The environmental test protocol should be endorsed by either the Administration or a competent authority of the manufacturer s home country to confirm that the laboratory is approved to conduct such tests. The protocol should also be signed and dated by the person in charge of the laboratory.

27 ANNEX 13 Page 25 Badge or Cipher APPENDIX 1 NAME OF ADMINISTRATION CERTIFICATE OF TYPE APPROVAL FOR 15PPM BILGE SEPARATOR This is to certify that the 15 ppm Bilge Separator listed below has been examined and tested in accordance with the requirements of the specifications contained in part 1 of the annex to the guidelines and specifications contained in IMO resolution MEPC.107(49). This certificate is valid only for 15 ppm Bilge Separator referred to below. 15 ppm Bilge Separator supplied by.. Under type and model designation..... and incorporating: * 15 ppm Bilge Separator manufactured by to specification/assembly drawing No.. date * Coalescer manufactured by to specification/assembly drawing No * Filters manufactured by other means. to specification/assembly drawing No * Other means to specification/assembly drawing No.. Control equipment manufactured by to specification/assembly drawing No. Supply pump capacity m 3 /h..motor kw rating kw. Maximum throughput of system. m 3 /h.. If integral feed pump is not fitted state method proposed for ensuring maximum throughput of system is not exceeded. A copy of this Certificate should be carried aboard a vessel fitted with this Separator at all times. Limiting conditions imposed... Test date and results attached in the appendix. Official stamp Signed... Administration of.... Date this day of 20.. * Delete as appropriate.

28 ANNEX 13 Page 26 APPENDIX TEST DATA AND RESULTS OF TESTS CONDUCTED ON A 15 PPM BILGE SEPARATOR IN ACCORDANCE WITH PART 1 OF THE ANNEX TO THE GUIDELINES AND SPECIFICATIONS CONTAINED IN IMO RESOLUTION MEPC.107(49) 15 ppm Bilge Separator submitted by Test location.. Method of sample analysis Samples analysed by. Environmental testing of the electrical and electronic sections of the 15 ppm Bilge Separator has been carried out in accordance with part 3 of the annex to the guidelines and specifications contained in IMO resolution MEPC.107(49). The equipment functioned satisfactorily on completion of each test specified on the environmental test protocol.

29 ANNEX 13 Page 27 Test fluid A Density at 15ºC Viscosity Centistokes at 100ºC Flashpoint ºC Ash content % Water content at start of test % Test fluid B Density at 15ºC Viscosity Centistokes at 40ºC Flashpoint ºC Ash content % Water content at start of test % Test fluid C Test water Test temperatures Surfactant - documentary evidence* Iron oxides - documentary evidence* Density at 20ºC Solid matter present Ambient ºC Test fluid A ºC Test fluid B ºC Test fluid C ºC Test water ºC Diagram of test rig attached Diagram of sampling arrangement attached * Certificate or laboratory analysis.

30 ANNEX 13 Page 28 TEST RESULTS (IN PPM) AND TEST PROCEDURES Test Fluid A ( ) ( ) ( ) ( ) ( ) ( ) Efficiency test Efficiency test 100% Condi % oil Condi- 25 % oil 100% oil tioning tioning oil Oil free 25% oil every 15 min. not Vm 30 Vm not Time less 2Ve 2Ve 30 less 120 (mins) than 5 than 5 Air cock open flow ceases Air cock open flow ceases Test sample 9(taken at the end of auto test, paragraph Ve - volume of equipment Test sample 9 (taken at the end of auto test, paragraph Annex to resolution..) Vm - quantity of oil/water mixture of the Annex to resolution ) Influent Effluent Test Fluid B Test fluid C ( ) ( ) (1.2.11) Efficiency test Efficiency test Efficiency test Condi % oil Condi- 25 % oil Conditioning 6% Test Fluid C tioning tioning Vm 30 Vm 30 Time Vm 150 Time 2Ve 2Ve (mins) 2Ve (mins) Influent Effluent Air cock open flow ceases Air cock open flow ceases Air cock open flow ceases steps refer to paragraph 1-18 points where samples to be taken 18 Signed. Date Official stamp (Official stamp or equivalent identification and the date of approval to be placed on all pages of the test protocol.)

31 ANNEX 13 Page 29 APPENDIX 2 Badge or Cipher NAME OF ADMINISTRATION CERTIFICATE OF TYPE APPROVAL FOR 15 PPM BILGE ALARM This is to certify that the 15 ppm Bilge Alarm, comprising the equipment listed below, has been examined and tested in accordance with the requirements of the specifications contained in part 2 of the annex to the Guidelines and Specifications contained in IMO resolution MEPC.107(49). This Certificate is valid only for the 15 ppm Bilge Alarm referred to below. 15 ppm Bilge Alarm supplied by.. under type and model designation. and incorporating: 15 ppm Bilge Alarm analysing unit manufactured by.. to specification/assembly drawing No. date.... Electronic section of 15 ppm Bilge Alarm manufactured by..... to specification/assembly drawing No. date.. * Sample feed pump manufactured by... to specification/assembly drawing No. date.. * Sample conditioning unit manufactured by to specification/assembly drawing No. date.. The 15 ppm Bilge Alarm is acceptable for use in accordance with regulation 16(5). A copy of this Certificate should be carried aboard a vessel fitted with this 15 ppm Bilge Alarm at all times. Test data and results attached as appendix. Official stamp Signed:... Administration of. Dated this.. day of * Delete as appropriate.

32 ANNEX 13 Page 30 APPENDIX TEST DATA AND RESULTS OF TESTS CONDUCTED ON A 15 PPM BILGE ALARM IN ACCORDANCE WITH PART 2 OF THE ANNEX TO THE GUIDELINES AND SPECIFICATIONS CONTAINED IMO RESOLUTION MEPC.107(49) 15 ppm Bilge Alarm submitted by.. Test location. Method of sample analysis... Samples analysed.. Environmental testing of the electronic section of the 15 ppm Bilge Alarm has been carried out in accordance with part 3 of the annex to the Guidelines and Specifications contained in IMO resolution MEPC.107(49). The equipment functioned satisfactorily on completion of each test specified on the environmental test protocol.

33 ANNEX 13 Page 31 CALIBRATION TEST AND RESPONSE TIME Test Fluid A B C Measured Grab sample Measured Grab sample Measured Grab sample 0 ppm 15 ppm Full scale (ppm) Water Temperature ºC ºC ºC Re-zero Yes/No Yes/No Yes/No Recalibrate Yes/No Yes/No Yes/No Response Time sec sec sec CONTAMINANT(S) AND COLOUR TEST Non-oil particulate matter Meter reading shift with ppm non-oil particulate contaminants and with very salt water. Oil Content Meter Reading Clean water and 10 ppm Test Fluid B ppm Very salt water Iron Oxide Iron Oxide Iron Oxide 10 ppm 50 ppm 100 ppm ppm ppm ppm ppm

34 ANNEX 13 Page 32 SAMPLE PRESSURE OR FLOW TEST 15 ppm Bilge Alarm reading shift at 50% of normal ppm 15 ppm Bilge Alarm reading shift at 200% of normal ppm Deviations from this test should be stated if necessary SHUT OFF TEST 15 ppm Bilge Alarm reading before shut-off ppm 15 ppm Bilge Alarm reading after start-up (minimum dry period 8 hours) ppm Damage to 15 ppm Bilge Alarm as follows:... UTILITIES SUPPLY VARIATION TEST 110% voltage effects.. 90% voltage effects.. 110% air pressure effects.. 90% air pressure effects.. 110% hydraulic pressure effects.. 90% hydraulic pressure effects.. OTHER COMMENTS

35 ANNEX 13 Page 33 CALIBRATION AND ZERO DRIFT TEST Calibration drift Zero drift ppm ppm Signed Dated..Official stamp (Official stamp or equivalent identification and the date of approval to be placed on all pages of the test protocol) ***

36

37 ANNEX 14 RESOLUTION MEPC.108(49) Adopted on 18 July 2003 REVISED GUIDELINES AND SPECIFICATIONS FOR OIL DISCHARGE MONITORING AND CONTROL SYSTEMS FOR OIL TANKERS THE MARINE ENVIRONMENT PROTECTION COMMITTEE, RECALLING Article 38(a) of the Convention on the International Maritime Organization concerning the functions of the Marine Environment Protection Committee conferred upon it by international conventions for the prevention and control of marine pollution, NOTING that regulation 15(3)(a) of Annex I of the International Convention for the Prevention of Pollution from Ships, 1973, as modified by the Protocol of 1978 relating thereto (MARPOL 73/78), specifies that oil tankers of 150 gross tonnage and above shall be fitted with an oil discharge and monitoring control system approved by the Administration and designed and installed in compliance with the Guidelines and Specifications for Oil Discharge Monitoring and Control Systems for Oil Tankers adopted by the Organization, NOTING ALSO resolution A.586(14) entitled Revised Guidelines and Specifications for Oil Discharge Monitoring and Control Systems for Oil Tankers developed in implementation of the said regulation, NOTING FURTHER regulation 14 of Annex II of MARPOL 73/78 in respect of the carriage of category C and D oil-like substances in oil tankers, RECALLING that by resolution A.886(21) the Assembly resolved that, in order to establish a uniform procedure, the function of adopting or amending performance standards and technical specifications referred to in the substantive text of MARPOL 73/78 and other IMO instruments, shall be performed by the Marine Environment Protection Committee and/or the Maritime Safety Committee, as appropriate, HAVING CONSIDERED, at its forty-ninth session, the recommendation submitted by the Sub-Committee on Ship Design and Equipment in light of the requirements of Annex I of MARPOL 73/78, 1. ADOPTS the Revised Guidelines and Specifications for Oil Discharge Monitoring and Control Systems for Oil Tankers, the text of which is set out in the Annex to this resolution, for application to oil tankers the keels of which are laid or which are in a similar stage of construction (hereinafter referred to as constructed ) on or after 1 January 2005; 2. INVITES Governments to implement these Revised Guidelines and Specifications when approving oil discharge monitoring and control systems being installed under regulation 15(3)(a) of Annex I of MARPOL 73/78 on oil tankers constructed on or after 1 January 2005.

38 ANNEX 14 Page 2 ANNEX REVISED GUIDELINES AND SPECIFICATIONS FOR OIL DISCHARGE MONITORING AND CONTROL SYSTEMS FOR OIL TANKERS TABLE OF CONTENTS 1 INTRODUCTION 1.1 Purpose 1.2 Applicability 1.3 Summary of requirements 2 BACKGROUND 3 DEFINITIONS 3.1 Oil discharge monitoring and control system 3.2 Control section 3.3 Overboard discharge control 3.4 Starting interlock 3.5 Control unit 3.6 PPM 4 IMPLEMENTATION REQUIREMENTS 5 CONSTRUCTION, MAINTENANCE, SECURITY, CALIBRATION AND TRAINING 6 TECHNICAL SPECIFICATIONS 6.1 Oil discharge monitoring and control system 6.2 Oil content meters 6.3 Sampling system 6.4 Flow rate indicating system 6.5 Ship s speed indicating system 6.6 Ship position indicating device 6.7 Overboard discharge control management 6.8 Processor and transmitting device 6.9 Recording devices 6.10 Data display 6.11 Manually operated alternatives in the event of equipment malfunction 6.12 Alarm conditions resulting in the stopping of discharge 6.13 Location of alarm indicator

39 ANNEX 14 Page 3 7 SPECIFICATIONS FOR TYPE APPROVAL OF THE OIL CONTENT METER AND THE CONTROL SECTION OF AN OIL DISCHARGE MONITORING AND CONTROL SYSTEM 7.1 Testing requirements 7.2 Approval and certification procedures 8 WORKSHOP FUNCTIONAL TEST REQUIREMENTS 9 PLAN APPROVAL REQUIREMENTS 10 GENERAL INSTALLATION REQUIREMENTS 11 INSTALLATION SURVEY 12 ON-BOARD FUNCTIONAL TEST AND CHECKOUT PROCEDURE ANNEX Part 1 - Test and performance specifications for type approval of oil content meters Part 2 - Specification for environmental testing for type approval of the oil content meter and the control section of an oil discharge monitoring and control system Part 3 - Documentation of approval APPENDIX - Certificate of type approval for oil content meters intended for monitoring the discharge of oil-contaminated water from the cargo tank areas of oil tankers

40 ANNEX 14 Page 4 1 INTRODUCTION 1.1 Purpose These Guidelines and Specifications contain requirements regarding the design, installation, performance and testing of oil discharge monitoring and control systems on oil tankers as required by regulation 15(3)(a) of Annex I of MARPOL 73/ The purpose of these Guidelines and Specifications is:.1 to provide a uniform interpretation of the requirements of regulation 15(3)(a) of Annex I of MARPOL 73/78;.2 to assist Administrations in determining appropriate design, construction and operational parameters for oil discharge monitoring and control systems for oil tankers, hereafter referred to as monitoring systems, when such systems are fitted in ships flying the flag of their State;.3 to define test and performance requirements for oil content meters and control sections forming part of monitoring systems;.4 to define requirements for plan approval of installations and functional testing of installed equipment; and.5 to provide guidance for the survey of installations on board These Guidelines and Specifications also apply to oil content monitoring systems used for monitoring certain category C and D oil-like noxious liquid substances carried in accordance with regulation 14 of Annex II of MARPOL 73/78. Wherever in these Guidelines and Specifications reference is made to oil being monitored, this applies likewise to such oil-like noxious liquid substances. 1.2 Applicability The Revised Guidelines and Specifications apply to equipment installed in oil tankers the keels of which are laid, or which are at a similar stage of construction, on or after 1 January The Guidelines and Specifications adopted under resolutions A.393(X), A.496(XII), MEPC.13(19) and A.586(14) are not applicable to oil tankers to which these new Guidelines and Specifications apply Equipment installed in other oil tankers the keels of which are laid, or are in a similar stage of construction, before 1 January 2005, should comply either with the requirements contained in the Guidelines and Specifications adopted under resolutions A.393(X), A.496(XII), MEPC.13(19) and A.586(14), as applicable, or with the requirements contained in these new Guidelines and Specifications.

41 ANNEX 14 Page Summary of requirements The approval requirements for various parts of a monitoring system as specified in these Guidelines and Specifications are summarized below:.1 the oil content meter should be tested for type approval in accordance with the procedures described in part 1 of the Annex;.2 the oil content meter and the control section of a monitoring system should be subjected to the environmental tests specified in part 2 of the annex;.3 documentation for plan approval, as specified in section 8, should be submitted to the Administration prior to the installation of the monitoring system;.4 the component parts of the system should undergo the workshop functional tests specified in section 8; and.5 the complete monitoring system should be surveyed in accordance with the procedures laid down in section BACKGROUND 2.1 The requirements of Annex I of MARPOL 73/78 relating to oil content monitoring of oil tanker ballast and tank washing water are set out in regulation 15(3)(a), which stipulates that oil tankers of 150 tons gross tonnage and above should be equipped with an approved monitoring system and that such system should record continuously:.1 the discharge of oil in litres per nautical mile; and.2 the total quantity of oil discharged, or alternatively, the oil content of the effluent and the rate of discharge. In both cases, the record should be identifiable as to time and date and should be kept for at least three years. 2.2 Regulation 15 also stipulates that the system should come into operation when there is any discharge of effluent into the sea and should be such as will ensure that any discharge of oily mixture is automatically stopped when the instantaneous rate of discharge of oil exceeds that permitted by regulation 9(1)(a). 3 DEFINITIONS 3.1 Oil discharge monitoring and control system An oil discharge monitoring and control system, referred to in these Guidelines and Specifications as a monitoring system, is a system which monitors the discharge into the sea of oily ballast or other oil-contaminated water from the cargo tank areas and comprises the items specified in paragraph

42 ANNEX 14 Page Control section A control section of a monitoring system is a unit composed of the items specified in paragraph Overboard discharge control An overboard discharge control is a device which automatically initiates the sequence to stop the overboard discharge of the effluent in alarm conditions and prevents the discharge throughout the period the alarm condition prevails. The device may be arranged to close the overboard valves or to stop the relevant pumps, as appropriate. 3.4 Starting interlock A starting interlock is a facility which prevents the initiation of the opening of the discharge valve or the operation of other equivalent arrangements before the monitoring system is fully operational when use of the monitoring system is required by the Convention. 3.5 Control unit A control unit is a device which receives automatic signals of:.1 oil content of the effluent ppm;.2 flow rate of discharge m 3 /hour;.3 ship s speed in knots;.4 ship's position - latitude and longitude;.5 date and time (GMT); and.6 status of the overboard discharge control The unit shall make automatic recordings of data as specified in paragraph ppm ppm means parts of oil per million parts of water by volume. 4 IMPLEMENTATION REQUIREMENTS Oil Discharge Monitoring and Control Systems should be fitted to oil tankers of 150 gross tonnage and above. It should employ a control unit and be fitted with a starting interlock and overboard discharge control.

43 ANNEX 14 Page 7 5 CONSTRUCTION, MAINTENANCE, SECURITY, CALIBRATION AND TRAINING 5.1 The instrument should be designed to ensure that user access is restricted to essential controls. Access beyond these controls should be available for emergency maintenance and temporary repair but must require the breaking of security seals or activation of another device which indicates an entry to the equipment. 5.2 The seals should be of a design that only the manufacturer or his agent can replace the seals or reset the system following inspection and permanent repairs to the equipment. 5.3 The accuracy of the Oil Discharge Monitoring equipment should be verified at the IOPP renewal surveys. The calibration certificate certifying date of last calibration check should be retained on board for inspection purposes. 5.4 The ODME unit may have several scales as appropriate for its intended use. The recording device fitted to a meter which has more than one scale should indicate the scale which is in use. 5.5 It is recommended that simple means be provided aboard ship to check on instrument drift, repeatability of the instrument reading, and the ability to re-zero the instrument. 5.6 Ship staff training should include familiarisation in the operation and the maintenance of the equipment. 5.7 The routine maintenance of the Oil Discharge Monitoring Equipment and troubleshooting procedures should be clearly defined by the manufacturer in the Operating and Maintenance Manual. All routine maintenance and repairs to be recorded. 6 TECHNICAL SPECIFICATIONS 6.1 Oil discharge monitoring and control system The monitoring system should be capable of effectively monitoring and controlling the discharge of any effluent into the sea through those overboard discharge outlets permitted by regulation 18 which, in the opinion of the Administration, are necessary to fulfil the operational requirements of the oil tanker The discharge of dirty ballast water or other oil-contaminated water from the cargo tank areas into the sea through outlets which are not controlled by the monitoring system is an infringement of the Convention The monitoring system should function effectively under all environmental conditions which oil tankers are normally assumed to encounter, and should be designed and constructed to satisfy the specifications for environmental testing specified in part 2 of the annex to these Guidelines and Specifications. Moreover,.1 the system should be so designed that no discharge of dirty ballast or other oil-contaminated water from the cargo tank areas can take place unless the monitoring system is in the normal operating mode and the relevant sampling point has been selected;

44 ANNEX 14 Page 8.2 preferably the system should sample the effluent discharge from a minimum number of discharge outlets and be so arranged that discharge overboard can take place via only one outlet at a time;.3 where it is intended that more than one line be used for simultaneous discharging purposes, one oil content meter, together with a flow meter, should be installed in each discharge line. These instruments should be connected to a common processor; and.4 in order to avoid alarms due to short-term high oil concentration signals (spikes) causing indications of high instantaneous rates of discharge, the short-term high ppm signal may be suppressed for a maximum of 10 s. Alternatively, the instantaneous rate of discharge may be continuously averaged during the preceding 20 s or less as computed from instantaneous ppm values of the oil content meter readings received at intervals not exceeding 5 s The monitoring system should comprise:.1 an oil content meter to measure the oil content of the effluent in ppm. The meter should be approved in accordance with the provisions contained in the annex to these Guidelines and Specifications and be certified to take into account the range of cargoes carried;.2 a flow rate indicating system to measure the rate of effluent being discharged into the sea;.3 a ship speed indicating device to give the ship s speed in knots;.4 a ship position indicating device to give the ship's position latitude and longitude;.5 a sampling system to convey a representative sample of the effluent to the oil content meter;.6 an overboard discharge control to stop the overboard discharge;.7 a starting interlock to prevent the discharge overboard of any effluent unless the monitoring system is fully operational; and.8 a control section comprising:.8.1 a processor, which accepts signals of oil content in the effluent, the effluent flow rate and the ship s speed and computes these values into litres of oil discharged per nautical mile and the total quantity of oil discharged;.8.2 means to provide alarms and command signals to the overboard discharge control;.8.3 a recording device to provide a record of data in accordance with paragraph 6.9.2;

45 ANNEX 14 Page a data display to exhibit the current operational data in accordance with paragraph 6.10;.8.5 a manual override system to be used in the event of failure of the monitoring system; and.8.6 means to provide signals to the starting interlock to prevent the discharge of any effluent before the monitoring system is fully operational Each main component of the oil content monitoring system should be fitted with a name-plate, properly identifying the component by assembly drawing number, type or model number and serial number, as appropriate If installed in a hazardous area, the electrical components of the monitoring system should meet the appropriate safety requirements laid down for these areas. 6.2 Oil content meter An oil content meter should satisfy the test and performance specifications contained in part 1 of the Annex to these Guidelines and Specifications and should conform with the general requirements contained in this subsection The accuracy of meters designed to monitor a wide range of oil content should be such that the reading will represent the actual oil content of the sample being tested within +10 ppm or +10%, whichever is the greater. The accuracy should remain within the above limit despite the presence of contaminants other than oil, such as entrained air, rust, mud and sand The meter should be designed so that it functions within the above limit when the power supply (in the form of electricity, compressed air, etc.) is varied by 10% from the value for which the meter is designed It is desirable that the reading should not be affected by the type of oil. If it is, it should not be necessary to calibrate the meter on board ship, but pre-set alterations in the calibration may be made in accordance with the manufacturer s instructions. In the latter case, means should be available to check that the correct calibration has been selected for the oil in question. The accuracy of the readings should at all times remain within the limit specified in The response time of the meter, as defined in paragraph of part 1 of the annex, should not exceed 20 s The meter may have several scales as appropriate for its intended use. The full range of the scale should not be less than 1,000 ppm The meter should have simple means to enable the ship s crew to check the functioning of the electrical and electronic circuitry of the meter by introduction of a simulated signal corresponding approximately to half the full-scale reading of the meter. It should also be possible for qualified personnel to recalibrate the meter on board the oil tanker. As specified in IEC publication 92 or its equivalent.

46 ANNEX 14 Page The meter should, if intended to be fitted in locations where flammable atmospheres may be present, comply with the relevant safety regulations for such spaces. Any electrical equipment which is part of the meter should be placed in a non-hazardous area, or should be certified by the Administration as safe for use in a hazardous atmosphere. Any moving parts which are fitted in hazardous areas should be so arranged as to avoid the formation of static electricity The meter should not contain or use any substance of a dangerous nature, unless adequate arrangements, acceptable to the Administration, are provided to eliminate any hazard introduced thereby The meter should resist corrosion in conditions of the marine environment The meter should be constructed from materials compatible with the liquids to be tested. 6.3 Sampling system Sampling points should be so located that relevant samples can be obtained from those outlets that are used for operational discharges in accordance with paragraph The sampling probes located in the overboard discharge lines and the piping system connecting the sampling probes to the oil content meter should meet the requirements of this section The piping and probes should be of a material resistant to fire, corrosion, and oil and be of adequate strength, properly jointed and supported The system should have a stop-valve fitted adjacent to each probe, except that, where the probe is mounted in a cargo line, two stop-valves shall be fitted, in series, in the sample line; one of these may be the remote controlled sample selector valve Sampling probes should be arranged for easy withdrawal and should as far as practicable be mounted at an accessible location in a vertical section of the discharge line. Should it be necessary to fit sampling probes in a horizontal section of the discharge line it should be ascertained, during the installation survey, that the pipe runs full of liquid at all times during the discharge of the effluent. Sampling probes should normally penetrate inside the discharge pipe to a distance of one quarter the diameter of that pipe Means should be provided for cleaning the probes and piping system by the provision of permanent clean water flushing arrangements or an equivalent method. The design of the probes and piping should be such as to minimize their clogging by oil, oily residue, and other matter The velocity of the fluid in the piping should be such that, taking into consideration the length of the piping, the overall response time should be as short as possible between an alteration in the mixture being pumped and the alteration in the meter reading and in any case not more than 40 s, including the response time of the meter The location of sampling probes in relation to any point of flow diversion to a slop tank should be selected with regard to the need for sampling the oily water in the recirculation mode.

47 ANNEX 14 Page The arrangements for driving the sampling pump or any other pumps used in the system should have regard to the safety requirements of the space in which the pump is located. Any bulkhead penetration between a hazardous and a non-hazardous area should be of a design approved by the Administration The flushing arrangement should be such that where necessary it can be utilized for test-running and stabilizing the oil content meter and correcting for zero setting Sample water returning to the slop tank should not be allowed to free-fall into the tank. In tankers equipped with an inert gas system a U-seal of adequate height should be arranged in the piping leading to a slop tank A valve should be provided for the manual collection of samples from the inlet piping to the meter at a point downstream of any sampling pump or at an equivalent location satisfactory to the Administration. 6.4 Flow rate indicating system A flow meter for measuring the rate of discharge should be installed in a vertical section of a discharge line or in any other section of a discharge line as appropriate, so as to be always filled with the liquid being discharged A flow meter should employ an operating principle which is suitable for shipboard use and, where relevant, can be used in large diameter pipes A flow meter should be suitable for the full range of flow rates that may be encountered during normal operation. Alternatively, arrangements such as the use of two flow meters of different ranges or a restriction of the operational flow rate range may be necessary to meet this requirement The flow meter, as installed, should have an accuracy of +10%, or better, of the instantaneous rate of discharge throughout the operating range for discharging the effluent Any component part of the flow meter in contact with the effluent should be of corrosionresistant and oil-resistant material of adequate strength The design of the flow metering arrangements should have regard to the safety requirements of the space in which such metering arrangements are located. 6.5 Ship s speed indicating system The automatic speed signal required for a monitoring system should be obtained from the ship s speed indicating device by means of a repeater signal. The speed information used may be either speed over the ground or speed through the water, depending upon the speed measuring equipment installed on board. See Recommendation on Performance Standards for Devices to Indicate Speed and Distance (Annex to resolution A.824(19) as amended by resolution MSC.96(72)).

48 ANNEX 14 Page Ship position indicating device The ship position indicating device shall consist of a receiver for a global navigation satellite system or a terrestrial radio navigation system, or other means, suitable for use at all times throughout the intended voyage to establish and update the ship s position by automatic means. 6.7 Overboard discharge control management The overboard discharge control should be able to stop the discharge of the effluent into the sea automatically by either closing all relevant overboard discharge valves or stopping all relevant pumps. The discharge control arrangement should be fail-safe so that all effluent discharge is stopped when the monitoring system is not in operation, at alarm conditions, or when the monitoring system fails to function. 6.8 Processor and transmitting device The processor of a control section should receive signals from the oil content meter, the flow rate indicating system and the ship s speed indicating system at time intervals not exceeding five seconds and should automatically compute the following:.1 instantaneous rate of discharge of oil in litres per nautical mile; and.2 total quantity of oil discharged during the voyage in cubic metres or litres When the limits imposed by regulation 9(1)(a)(iv) and (v) are exceeded, the processor should provide alarms and provide command signals to the overboard discharge control arrangement which will cause the discharge of effluent into the sea to stop The processor should normally include a device for the continuous generation of time and date information. Alternative arrangements for the automatic and continuous reception of time and date information from an external source may be accepted In the event of power failure the processor should retain its memory in respect to computation of the total quantity of oil discharged, time and date. A printout of data should be obtained when the monitoring system is operating with manual override, but this is not required if, when the power fails, the monitoring system activates the overboard discharge control to stop the discharge of effluent. 6.9 Recording devices The recording device of a control section should include a digital printer, which may be formatted electronically if preferred. The recorded parameters should be explicitly identified on the printout. The printout should be legible and should remain so once removed from the recording device and should be retained for at least three years The data to be automatically recorded should include at least the following:.1 instantaneous rate of discharge of oil (litres per nautical mile);.2 instantaneous oil content (ppm);

49 ANNEX 14 Page 13.3 the total quantity of oil discharged (cubic metres or litres);.4 time and date (GMT);.5 ship s speed in knots;.6 ship s position latitude and longitude;.7 effluent flow rate;.8 status of the overboard discharge control or arrangement;.9 oil type selector setting, where applicable;.10 alarm condition;.11 failure (i.e. no flow, fault, etc.); and.12 override action (i.e. manual override, flushing, calibration, etc.). Any information inserted manually as a result of an override action should be identified on the printout Data required in paragraph of these Guidelines and Specifications should be printed out, as applicable, or may be stored electronically with printout capability, with the following minimum frequency:.1 when the discharge is started;.2 when the discharge is stopped;.3 at intervals of not more than 10 min (except when the system is in stand-by mode);.4 when an alarm condition develops;.5 when normal conditions are restored;.6 whenever the computed rate of discharge varies by 10 litres per nautical mile;.7 when zero-setting or calibration modes are selected; and.8 on manual command The recording device should be located in a position easily accessible to the person in charge of the overboard discharge operation.

50 ANNEX 14 Page Data display In addition to the recorded printout, the current data should be visibly displayed and should as a minimum contain the following:.1 instantaneous rate of discharge of oil (litres per nautical mile);.2 total quantity of oil discharged (cubic metres or litres);.3 instantaneous oil content (ppm).4 flow rate;.5 ship s speed; and.6 status of the overboard discharge control or arrangement The data display should be located in a position easily observed by the person in charge of the overboard discharge operation Manually operated alternatives in the event of equipment malfunction The alternative means of obtaining information in the event of a failure in the monitoring system should be as follows:.1 oil content meter or sampling system: visual observation of the surface of the water adjacent to the effluent discharge;.2 flow meter: pump discharge characteristics, etc.;.3 ship s speed indicating device: main engine rpm, etc.;.4 processor: manual calculation and manual recording; and.5 overboard discharge control: manual operation of pumps and valves Alarm conditions resulting in the stopping of discharge Audio-visual alarms should be activated for any of the following conditions and the monitoring system should be so arranged that the discharge of effluent into the sea is stopped:.1 whenever the instantaneous rate of discharge of oil exceeds 30 litres per nautical mile;.2 when the total quantity of oil discharged reaches 1/30,000 of the previous cargo;.3 in the event of failure of the system s operation, such as:.3.1 power failure;.3.2 loss of sample; Existing ships to comply with requirements of regulation 9(1)(a)(5) of MARPOL Annex I.

51 ANNEX 14 Page significant failure of the measuring or recording system; or.3.4 when the input of any sensor exceeds the effective capacity of the system Location of alarm indicator The alarm indicator of the system should be installed in the cargo control room, where provided, and/or in other places where it will attract immediate attention and action. 7 SPECIFICATIONS FOR TYPE APPROVAL OF THE OIL CONTENT METER AND THE CONTROL SECTION OF AN OIL DISCHARGE MONITORING AND CONTROL SYSTEM 7.1 Testing requirements An oil content meter should be tested for its ability to determine the oil content over a wide range of oil contents and types of oil and within the accuracy limits specified in paragraph The meter, which is to be identical in all respects with the production model for which the approval will apply, should be type-tested in accordance with the test and performance specifications contained in part 1 of the annex to these Guidelines and Specifications An oil content meter and a control section of the monitoring system, which is to be identical in all respects with the production model for which the approval will apply, should be type-tested in accordance with the specification for environmental testing contained in part 2 of the annex to these Guidelines and Specifications. 7.2 Approval and certification procedures Oil content meters which in every respect fulfil the requirements of these Guidelines and Specifications may be approved by the Administration for fitting on board tankers. The approval should take the form of a certificate of type approval specifying the main particulars of the apparatus and any limiting conditions on its usage necessary to ensure its proper performance. Such certificate should be issued in the format shown in part 3 of the annex to these Guidelines and Specifications. A copy of the certificate of type approval for the oil content meter should be carried aboard an oil tanker fitted with such equipment at all times A certificate of type approval should be issued for the specific application for which the oil content meter is approved, i.e. for crude oil, black products, white products, other products or applications as listed on the certificate Approved oil content meters may be accepted by other countries for use on their ships on basis of the first trials, or after new tests carried out under the supervision of their own representatives. Should an oil content meter pass a test in one country but fail a test of a similar nature in another country, then the two countries concerned should consult one another with a view to reaching a mutually acceptable agreement. 8 WORKSHOP FUNCTIONAL TEST REQUIREMENTS 8.1 Each oil content meter and each control section of a monitoring system should be subjected to a functional test on a suitable test bench prior to delivery. The detailed programme for a functional test of such equipment should be developed by the manufacturer, taking into

52 ANNEX 14 Page 16 account the features and functions of the specific design of equipment. A completed workshop certificate including the delivery test protocol should be supplied with each unit delivered. 8.2 A functional test conducted on an oil content meter should include at least all the following operations:.1 check flow rate, pressure drop, or an equivalent parameter as appropriate;.2 check all alarm functions built into the meter;.3 check all switching functions interconnecting with other parts of the system; and.4 check correct reading at several ppm values on all measurement scales when operated on an oil appropriate for the application of the meter or by an equivalent method. 8.3 A functional check conducted on a control section of a monitoring system should include at least all the following operations:.1 check all alarm functions;.2 check correct function of the signal processor and the recording equipment when simulated input signals of ppm, flow rate, and speed are varied;.3 check that the alarm is activated when the input signals are varied so that the discharge limits contained in regulation 9(1)(a)(iv) and (v) are exceeded;.4 check that a signal is given to the overboard discharge control when alarm conditions are reached; and.5 check that the alarm is activated when each one of the input signals is varied to exceed the capacity of the system. 9 PLAN APPROVAL REQUIREMENTS Adequate documentation should be prepared well in advance of the intended installation of a monitoring system and should be submitted to the Administration for approval. The documentation to be submitted should include at least all the following:.1 a description of the monitoring system. The description should include a diagrammatic drawing of the pumping and piping arrangements, identifying the operational outlets for dirty ballast and oil-contaminated water from the cargo tank area and compatible with the operational requirements set out in the oil tanker s cargo and ballast handling manuals. Special considerations may have to be given to installations in oil tankers which have unusual pumping and piping arrangements;.2 equipment manuals, supplied by manufacturers, which should contain details of the major components of the monitoring system;

53 ANNEX 14 Page 17.3 an operations and technical manual for the complete monitoring system which is proposed to be installed in the oil tanker. This manual should cover the arrangements and operation of the system as a whole and should specifically describe parts of the system which are not covered by the manufacturer s equipment manuals;.4 the operations section of the manual should include normal operational procedures and procedures for the discharge of oily water in the event of malfunction of the equipment;.5 the technical section of the manual should include adequate information (description and diagrammatic drawings of the pumping and piping arrangements of the monitoring system and electrical/electronic wiring diagrams) to enable fault finding and should include instructions for keeping a maintenance record;.6 a technical installation specification defining, inter alia, the location and mounting of components, arrangements for maintaining the integrity of the boundary between safe and hazardous spaces and the arrangement of the sample piping, including calculation of the sample response time referred to in paragraph The installation should comply with manufacturers specific installation criteria;.7 a copy of the certificate of type approval for the oil content meter and technical documentation relevant to other main components of the monitoring system; and.8 a recommended test and checkout procedure specific to the monitoring system installed. This procedure should specify all the checks to be carried out in a functional test by the installation contractor and should provide guidance for the surveyor when carrying out the on-board survey of the monitoring system and confirming the installation reflects the manufacturers specific installation criteria. 10 GENERAL INSTALLATION REQUIREMENTS 10.1 The on-board installation arrangements must be such that satisfactory function of the entire system is obtained and all safety regulations issued by the relevant Administration are complied with The installation arrangements must conform in each case with those specified and approved under the procedure for plan approval outlined in section The installation arrangements must also satisfy all relevant parts of the technical specifications in section 6 and all relevant installation instructions provided by the manufacturer of the various items of equipment and components. 11 INSTALLATION SURVEY 11.1 Verify that the following documentation is on board in a suitable format for permanent use:.1 copy of the certificate of type approval for the oil content meter;

54 ANNEX 14 Page 18.2 statement from the Administration, or from a laboratory authorized by the Administration, to confirm that the control section of the monitoring system has been type-tested in accordance with the specifications for environmental testing contained in part 2 of the annex;.3 equipment manuals for major components of the system;.4 operations and technical manual approved by the Administration, containing a technical description of the system, operational procedures and backup procedures in case of equipment malfunction;.5 installation specification; and.6 installation checkout procedures Verify the completeness of the workshop certificate for the oil content meter and the control section of the monitoring system Verify that the system installation has been carried out in accordance with the approved technical installation specification referred to in paragraph Verify that:.1 the oil content meter is identical to the one for which the certificate of type approval has been issued;.2 the installation of the oil content meter and the control section of the monitoring system has been carried out in accordance with the manufacturer s equipment specification; and.3 the operational outlets are located in the positions indicated on the drawing of the pumping and piping arrangements Verify that the workmanship of the installation is satisfactory and, in particular, that the bulkhead penetrations are to the relevant approved standard Verify that the monitoring system operates correctly when tested in accordance with the approved procedures contained in section 12 of these Guidelines and Specifications. 12 ON-BOARD FUNCTIONAL TEST AND CHECKOUT PROCEDURE The functional test referred to in paragraph should include at least all the following tests when the monitoring system is operating on water:.1 verify correct running of pumps, absence of leakage in the sample pumping and piping system, correct functioning of remote controlled sampling valves, etc.;.2 verify by checking flow rates or pressure drops, as appropriate, that the system operates under correct flow conditions. This test should be repeated separately for each sampling point;

55 ANNEX 14 Page 19.3 verify that alarms function correctly when a malfunction occurs external to the monitoring system, such as no sample flow, no flow meter signal, power failure, etc.;.4 vary the simulated input signals manually while the monitoring system is operating on water and check the recordings for correct values and timing. Vary the simulated manual input signals until alarm conditions are obtained, and verify proper recordings. Ascertain that the overboard discharge control is activating and verify that the action is being recorded;.5 verify that normal operating condition can be reset when the value of the instantaneous rate of discharge is reduced below 30 litres per nautical mile;.6 activate the manual override control and verify that a recording is made and that the overboard discharge control can be operated;.7 turn off the system and verify that the overboard discharge valve closes automatically or the relevant pumps are stopped and the overboard discharge control is inoperative;.8 start up the system and check the zero and gain setting for the oil content meter in accordance with the manufacturer s operations and technical manual; and.9 check the accuracy of the flow meter(s), for example by pumping water in a loop where the flow rate may be calculated from the level change in a tank. The check should be made at a flow rate of about 50% of the rated flow of the flow meter.

56 ANNEX 14 Page 20 ANNEX This annex contains detailed test and performance specifications for components of an oil discharge monitoring and control system for oil tankers. The Annex is divided into three parts: Part 1 - Test and performance specifications for type approval of oil content meters; Part 2 - Specification for environmental testing for type approval of the oil content meter and the control section of an oil discharge monitoring and control system; and Part 3 - Documentation of approval PART 1 - TEST AND PERFORMANCE SPECIFICATIONS FOR TYPE APPROVAL OF OIL CONTENT METERS 1.1 General This test and performance specification for type approval relates to oil content meters for oil discharge monitoring and control systems for oil tankers. A meter may be tested for one of several specified applications (crude oils, black products, and white products) and the certificate of type approval should clearly indicate the accepted application(s). In addition, the electronic and measuring section of the oil content meter should be tested in accordance with the specification for environmental testing contained in part 2 of this annex The meter being tested should satisfy all the relevant requirements contained in section 6 of these Guidelines and Specifications. 1.2 Test specifications A meter designed to operate over a wide range of oil content should measure the true oil content of the sample entering the meter during each test within +10 ppm or +10%, whichever is the greater, and testing should be performed in accordance with the procedures detailed in paragraphs to of this specification. The accuracy should remain within these limits in the presence of contaminants other than oil and +10% variations from design criteria with respect to power (electricity and compressed air) A diagrammatic arrangement of a test rig for evaluating the performance of oil content meters is given in figure 1. The accuracy of the oil content meter should be determined by comparing its readings with a known flow of oil injected into a known flow of water. The grab samples taken should be analysed in a laboratory by the method described in paragraph 1.3 of this specification. The results of the laboratory analysis will be used for correlation and to indicate sampling and test equipment variability. The water flow rate should be adjusted so that the entire oil-water flow passes through the oil content meter, except the intermittent grab sample stream. Special care should be given to keep, continuously, a constant oil content in the water that flows into the meter. The oil and contaminant metering pumps should be adjusted to deliver a steady flow. If oil injection becomes intermittent at low concentrations, the oil may be premixed with water to provide continuous flow, if absolutely necessary. The oil injection point should be immediately upstream of the oil content meter inlet to minimize time lags caused by the sample system. Wherever No.2 crude oil is specified in particular tests, a similar crude oil may be substituted, provided that the oil selected is used throughout the tests.

57 MEPC 49/22/Add.2 ANNEX 14 Page The sampling arrangement should be such that a representative homogeneous sample is obtained under all conditions of operation and under all operational proportions of oil content. The sample should be obtained from the full flow through the meter, but when this is impracticable, the sampling arrangements shown in figure 2 should be used. Special care should be taken in collecting and preserving the sample to ensure validity of the resultant findings Should the oil content meter incorporate a filter or other device for removing solid contaminants from the mixture to be tested, such a device should be regarded as part of the oil content meter and be connected during all the tests. After completion of the contaminant, tests referred to in paragraph the device used to remove solid contaminants from the mixture should be opened up and the residues inspected to ascertain that they do not contain significant amounts of oil Calibration and zero test. The oil content meter should be calibrated and zeroed in accordance with the manufacturer s instructions. It should then be tested using the No.2 crude oil at the following concentrations in ppm 0, 15, 50, 100, 200 and at intervals of 200 up to the maximum of the meter s highest range. A complete calibration curve should be constructed. Each concentration test should last for 15 min. After each concentration test the meter should be run on oil-free water for 15 min and the reading noted. The instrument should not be re-calibrated in spite of any movement from zero Response tests. Different oil types After calibration in the previous test, the oil content meter should be tested at concentrations of 15 ppm, 150 ppm and 90% of the maximum full-scale with the following oils. Additional concentrations may be added if required to construct a complete calibration curve for each of the following oils: For CRUDE OILS¹ Category of Oil Categories Represented Parameters Tolerance 1 Density low Viscosity low Pour Point very low Density*: Kinematic viscosity**: 2.65 ± 5% Cloud point***: -2 ± 3 C General description mixed base 2 Density medium Viscosity medium Pour point low General description mixed base 3 Density high Viscosity medium Pour point low General description naphthenic 4 Density very high Viscosity very high Pour point low General description asphaltic 5 Density medium Viscosity high Pour point very high General description paraffinic Density: Kinematic viscosity: ± 5% Cloud point: -5 ± 3 C Density: Kinematic Viscosity: 12.9 ± 5% Cloud point: 5 ± 3 C Density: Kinematic Viscosity: 1246 ± 5% Cloud point: 29 ± 3 C Density: Kinematic Viscosity: 3.96² ± 5% Cloud point: 39 ± 3 C 6 Marine residual fuel oil RMG 35 RMG 35 Parameters as per ISO 8217:1996 (table 2)

58 ANNEX 14 Page 22 Notes: 1 Reference for these parameters is Institute of Petroleum publication Petroleum Measurement Paper No. 8 ISBN This viscosity is recorded at 40ºC due to this oil s high pour point which renders the kinematic viscosity not measurable at 20ºC. * Density in kg/m 3 at 15ºC; this parameter is reported by conversion using table 3 of the Petroleum Measurement Tables ASTM D ** Kinematic viscosity (Cst) at 20ºC. *** Cloud Point in ºC. Note: Other oils covering the range of properties shown may be substituted if those shown are unobtainable. The characteristics of the oil and age of sample shall be recorded. Samples used for approval must be less than 12 months old. Following each test, the meter should be run on oil-free water for 15 min and the meter reading recorded. Should the meter reading at zero oil through put exceed the accuracy requirement, an automatic cleaning device should be fitted to the instrument as standard. If it is necessary to re-zero, recalibrate, or clean the meter between tests, this fact and the time required to recalibrate or clean the meter should be noted and recorded on the certificate White petroleum products. If the meter is considered suitable for white petroleum products, it should also be tested with the following products in a manner similar to the tests set out in paragraphs and 1.2.6:.1 Automotive gasoline;.2 Kerosene; and.3 Marine distillate fuel oil DMA ISO 8217: 1996 (table 1). If the meter is to be considered suitable for any of the category C and D oil-like noxious liquid substances referred to in the list contained in the unified interpretations to regulation 14 of Annex II of MARPOL 73/78, it should also be tested against each such substance for which approval is required, in a manner similar to the tests set out in paragraphs and The high shear pump shown in figure 1 should be kept in operation at high speed during this test to assist in dissolving the appropriate fraction of the substance in the water stream Response times. The oil content meter should be run on oil-free water and zeroed. The oil injection pump, set to 100 ppm No.2 crude oil, should be turned on. The following response times should be recorded and included on the certificate:.1 time for first detectable reading;.2 time to read 63 ppm;.3 time to read 90 ppm; and

59 ANNEX 14 Page 23.4 time to read 100 ppm or for reading to stabilize at maximum, the value (ppm) of which should be recorded. Following this upscale test, the oil injection pump should be turned off and the following response times should be recorded and included on the certificate:.5 time for the maximum reading to drop detectably;.6 time to read 37 ppm;.7 time to read 10 ppm; and.8 time for reading to stabilize at minimum, the value (ppm) of which should be recorded. The response time of the meter, which should be taken as the average of the response time recorded to read 63 ppm and the response time recorded to read 37 ppm, should be less than 20 s Oil fouling and calibration shift tests. Two tests using No.2 crude oil should be performed to determine the effect of oil fouling on calibration shift. The first test should be done with a 10% oil concentration and the second with a 100% oil concentration. For the 10% oil concentration test, the meter should initially be running on oil-free water. The high capacity oil injection pump, set to give 10% oil in water, should be turned on for 1 min and then turned off. For the 100% oil concentration test, the meter should be running on oil-free water. The water should be turned off and 100% oil turned on for 1 min. The oil should then be turned off and the oil-free water flow resumed. Care must be taken in the design of the test equipment to ensure that the oil fouling test results are not degraded by fouling of the sample piping external to the meter. The following response times should be noted for both tests and recorded on the certificate:.1 time for first detectable reading;.2 time to read 15 ppm;.3 time to read 100 ppm;.4 time for reading to go off scale on the highest range;.5 time for reading to return back on scale on the highest range;.6 time for reading to return to 100 ppm;.7 time for reading to return to 15 ppm; and.8 time for reading to return to zero or stabilize at minimum ppm reading.

60 ANNEX 14 Page 24 If it is necessary to clean the meter after each oil fouling test for it to return to a zero reading, this fact and the time required to clean and recalibrate the meter shall be noted and recorded on the certificate. After successful completion of both oil fouling tests, a 100 ppm mixture of No.2 crude oil should be introduced and any calibration shift noted and recorded on the certificate Contaminant tests. The meter should be run on contaminant test as follows:.1 the contaminants should be mixed in the mixing tank with clean water as follows: not less than 270 ppm by weight of attapulgite (see note (a)) and 30 ppm by weight of iron oxides (see note (b)). Each material should be mixed sequentially in the mixing tank to the following criteria:.1.1 attapulgite for a period of not less than 15 min so that a homogenous suspension is formed; iron oxides for an additional period of not less than 10 min. The mixing process should maintain the contaminants in suspension throughout the test period;.2 the meter should be run on a mixture of clean water and No.2 crude oil of 15 ppm;.3 the water supply should be changed from clean water to contaminated water;.4 any shift in the meter reading should be noted in the certificate. The meter reading should be within the accuracy limits specified in 1.2.1;.5 the test specified in.2,.3, and.4 above, should be repeated with oil concentrations of 100 ppm and 300 ppm; and.6 sufficient water should be available in the mixing tanks to ensure an effective test period of not less than 15 min. Notes: (a) (b) Attapulgite is a clay mineral with the chemical formula (MgAl) 5 Si 8 O 22 (OH) 4 4H 2 O and is stable in both fresh and salt water. The test contaminant should have a particle size distribution with about 30% of 10 microns or less and a maximum particle size of 100 microns. The term iron oxides is used to describe black ferrosoferric oxide (Fe 3 O 4 ) with a particle size distribution of which 90% is less than 10 microns, the remainder having a maximum particle size of 100 microns Air entrainment test.1 The meter should be run on a mixture of water and 15 ppm No.2 crude oil..2 Air should be injected into the test circuit immediately before the sample pump or, in the absence of such pump, immediately before any conditioning unit used to prepare the mixture for measurement. Injection should be by needle having an orifice dimension not exceeding 0.5 mm in diameter arranged in line with the sample flow. The quantity of air injected should be 1% of the designated flow rate of the sample pump or conditioning unit at the point of injection. Air should

61 ANNEX 14 Page 25 be delivered to the system by direct injection or pump via a suitable measuring device designed to permit a constant controllable flow rate within +10% of the required rate of injection for an uninterrupted effective test period of not less than 15 min..3 Any shift in the meter reading should be recorded on the certificate..4 The tests specified in points 1, 2 and 3 should be repeated with an oil concentration of 100 ppm and 300 ppm respectively Oil particle size - shear pump test. The meter should be run on a mixture of water and No. 2 crude oil of 100 ppm. The high shear pump, shown in figure 1, should be run at various speeds to provide a range of oil particle size to the meter and on completion of this test the pump should be stopped. Any effect of particle size on the meter reading should be noted and recorded on the certificate. The purpose of this test is to demonstrate that the meter s accuracy is not significantly affected by the oil droplet size or by the degree of oil and water mixing Temperature test. The meter should be run on a mixture of water and No.2 crude oil of 100 ppm. The water temperature should initially be set at 10 o C and then at 65 o C. If the manufacturer s specification lists an operating maximum water temperature of less than 65 o C,the meter should be run at that maximum temperature and this fact, together with any effect of water temperature on the meter reading, should be recorded on the certificate Sample pressure or flow test. The meter should be run on a mixture of water and No.2 crude oil of 100 ppm. The water pressure or flow rate of the mixture should be adjusted from one-half normal, to normal and to twice normal. Any effect of these changes on the meter reading should be recorded on the certificate. This test may require modification, depending on the flow characteristics of the meter Shut-off test. The meter should run on a mixture of water and No.2 crude oil of 100 ppm. The water and oil injection pumps should be shut off and the meter left on with no other changes made. After eight hours, the water and the oil injection pumps should be turned on and set to provide a mixture of 100 ppm. The meter readings before and after each test and any damage to the meter should be recorded on the certificate. This test also determines the proper functioning of the low flow shut-off and alarm Utility supply variation test. The meter should be run on a mixture of water and No.2 crude oil of 100 ppm. The supply voltage should be increased to 110% of the nominal value for one hour and then reduced to 90% of the nominal value for one hour. Any effect on meter performance should be recorded on the certificate. If the operation of the meter requires any utilities besides electricity, it should be tested with these utilities at 110% and 90% of the design figures Calibration and zero drift test. The meter should be calibrated and zeroed in accordance with the procedures in the manufacturer s instructions manual. A mixture of water and No.2 crude oil of 100 ppm should be run through the meter for eight hours and any calibration drift recorded on the certificate. Following this, the meter should be run on oil-free water and any zero drift recorded on the certificate.

62 ANNEX 14 Page Shut-down and re-energization test. The meter should be shut down and de-energized for one week. It should be turned on and started in accordance with the manufacturer s instructions. After the suggested warm-up and calibration procedures, the meter should be run for a period of eight hours, operating alternatively for one hour on a mixture of water and No.2 crude oil of 100 ppm and for one hour on oil-free water. After each step in the operation, any zero or span drift should be recorded on the certificate. The total time required to perform the manufacturer s suggested warm-up and calibration should also be recorded on the certificate Reporting of test results. A specification of the instrument concerned and a diagrammatic presentation of the test arrangements should be provided to the Administration by the manufacturer when applying for type approval and the following data should be reported in the international metric system of units:.1 types and properties of oils used in the tests;.2 details of contaminants used, in the form, for example, of a supplier s certificate or laboratory test protocol; and.3 results of tests and analysis of grab samples. The recommendations of the manufacturer of the oil content meter concerning the choice and application of cleansing agents used for cleaning purpose should be recorded in the appendix to the type approval certificate. Figure 1 Test rig The size of the mixing tank should be specified so as to allow a minimum once through effective test period of 15 min. Adequate arrangements should be made for in-tank mixing or recycling to ensure a homogeneous mixture.

63 ANNEX 14 Page 27 A Distance A, not greater than 400 mm B Distance B, sufficient to insert sample bottle C Dimension C, straight length should not be less than 60 mm D Dimension D, pipe thickness should not be greater than 2 mm E Detail E, chisel-edged chamfer (30º) Figure 2 Alternative sampling arrangement in test rig 1.3 Method for the determination of oil content The determination of the oil content will be performed according to the International Standard ISO :2000 Water quality Determination of hydrocarbon oil index Part 2: Method using solvent extraction and gas chromatography that specifies a method for sampling and subsequent determination of the hydrocarbon oil index in water using solvent extraction and gas chromatography. This method should be used for the determination of oil content requirements outlined in these Guidelines and Specifications. PART 2 SPECIFICATION FOR ENVIRONMENTAL TESTING FOR TYPE APPROVAL OF THE OIL CONTENT METER AND THE CONTROL SECTION OF AN OIL DISCHARGE MONITORING AND CONTROL SYSTEM 2.1 General The specification for environmental testing for type approval relates to the electronic section of the oil content meter and the control section of a monitoring and control system. A control section may be an independent unit or be combined with the electronic part of the oil content meter The equipment tested should comply with all the relevant requirements contained in section 5 of the Guidelines and Specifications.

64 ANNEX 14 Page Test specifications Testing requirements The electrical and electronic section of the oil content meter and the control section of the monitoring system in the standard production configuration should be subjected to the programme of environmental tests set out in this specification at a laboratory approved for the purpose by the Administration or by the competent authority of the manufacturer s home country. A copy of the environmental test document, in a format similar to that specified in paragraph 3.2 of this specification, should be submitted to the Administration by the manufacturer together with the application for type approval Test specification details Equipment should operate satisfactorily on completion of each of the following environmental tests:.1 Vibration tests.1.1 a search should be made for resonance over the following range of frequency and amplitude or acceleration: to 13.2 Hz with an amplitude of +1 mm; and to 80 Hz with an acceleration of +0.7 g; This search should be made in each of the three planes at a rate sufficiently low to permit detection of resonance;.1.2 the equipment should be vibrated in the planes at each major resonant frequency for a period of two hours;.1.3 if there is no resonant frequency, the equipment should be vibrated in each of the plans at 30 Hz with an acceleration of +0.7 g for a period of two hours;.1.4 after completion of the tests specified in.1.2 or.1.3 of this paragraph a search should again be made for resonance and there should be no significant change in the vibration pattern;.2 Temperature tests.2.1 Equipment that may be installed in exposed areas on the open deck or in an enclosed space not environmentally controlled should be subjected, for a period of not less than two hours, to: a low temperature test at 25 o C; and a high temperature test at 55 o C;

65 MEPC 49/22/Add.2 ANNEX 14 Page Equipment that may be installed in an enclosed space that is environmentally controlled including an engine-room, should be subjected, for a period of not less than two hours, to: a low temperature test at 0 o C; and a high temperature test at 55 o C;.3 Humidity tests At the end of each of the tests referred to in this subparagraph above, the equipment should be switched on and it should function normally under the test conditions; Equipment should be left switched off for a period of two hours at a temperature of 55 o C in an atmosphere with a relevant humidity of 90%. At the end of this period, the equipment should be switched on and should operate satisfactorily for one hour;.4 Tests for protection against heavy seas Equipment that may be installed in exposed areas on the open deck shall be subjected to tests for protection against heavy seas in accordance with lp 56 of IEC publication 529 or its equivalent;.5 Fluctuation in power supply.5.1 Equipment should operate satisfactorily with: a voltage variation of +10% together with a simultaneous frequency variation of +5%; a transient voltage of +20% together with a simultaneous frequency transient of +10%, with a transient recovery time of three seconds;.6 Inclination test Equipment should operate satisfactorily at angles of inclination up to 22.5 o C in any plane from the normal operating position;.7 Reliability of electrical and electronic equipment The electrical and electronic components of the equipment should be of a quality guaranteed by the manufacturer and suitable for their intended purpose. PART 3 DOCUMENTATION OF APPROVAL 3.1 Certificate of type approval for oil content meters Satisfactory compliance with all the test requirements enumerated in part 1 of this annex should be shown in the certificate of type approval issued by the Administration in the format

66 ANNEX 14 Page 30 specified in paragraph below. An Administration may issue a certificate of type approval based on separate testing or on testing already carried out under supervision by another Administration A certificate of type approval should be in the format shown in the appendix to this annex. The certificate should identify the type and model of the oil content meter to which it applies and identify equipment assembly drawings, duly dated. Each drawing should bear the model specification numbers or equivalent identification details. The certificate should include the full performance test protocol on which it is based. If a certificate of type approval is issued by an Administration based on a certificate previously issued by another Administration, the certificate should identify the Administration which conducted the tests on the oil content meter and a copy of the original test should be attached to it. 3.2 Format of environmental test protocol Satisfactory compliance with the environmental tests laid down in these Guidelines and Specifications, where applicable, should be shown on the environmental test protocol issued by the testing laboratory. The protocol should include at least the following details:.1 identification of the equipment by type and drawing number, duly dated; and.2 a statement of the tests conducted on the equipment, including the results thereof The environmental test protocol should be endorsed by either the Administration or a competent authority of the manufacturer s home country to confirm that the laboratory is approved to conduct such tests. The protocol should also be signed and dated by the person in charge of the laboratory.

67 ANNEX 14 Page 31 Badge or Cipher APPENDIX NAME OF ADMINISTRATION CERTIFICATE OF TYPE APPROVAL FOR OIL CONTENT METERS INTENDED FOR MONITORING THE DISCHARGE OF OIL-CONTAMINATED WATER FROM THE CARGO TANK AREAS OF OIL TANKERS This is to certify that the oil content meter, comprising the equipment listed below, has been examined and tested in accordance with the requirements of the specification contained in part 1 of the annex to the Guidelines and Specifications contained in IMO resolution MEPC.108(49). This certificate is valid only for an oil content meter referred to below. Oil content meter supplied by. under type and model designation.. and incorporating: Oil content meter analysing unit manufactured by. to specification /assembly drawing No....date.. Electronic section of oil content meter manufactured by to specification/assembly drawing No.. date... *Sample feed pump manufactured by.. to specification/assembly drawing No.. date..... *Sample conditioning unit manufactured by.. to specification/assembly drawing No.. date..... The oil content meter is acceptable for the following applications: * Crude oils * Black" products * "White" products * Oil-like noxious liquid substances, other products, or applications, listed below A copy of this certificate should be carried aboard a ship fitted with this equipment at all times. Test data and results attached as appendix. Signed.. Official stamp Administration of.. Dated this... day of.. 20 * Delete as appropriate.

68 ANNEX 14 Page 32 APPENDIX TEST DATA AND RESULTS OF TESTS CONDUCTED ON AN OIL CONTENT METER IN ACCORDANCE WITH PART 1 OF THE ANNEX TO THE GUIDELINES AND SPECIFICATIONS CONTAINED IN IMO RESOLUTION MEPC.108(49) Oil content meter submitted by Test location.. Method of sample analysis. Samples analysed by. Environmental testing of the electronic section of the oil content meter has been carried out in accordance with part 2 of the annex to the Guidelines and Specifications contained in IMO resolution MEPC.108(49). The equipment functioned satisfactorily on completion of each test specified on the environmental test protocol.

69 ANNEX 14 Page 33 READINGS (ppm) Indicated Measured Grab sample REMARKS CALIBRATION TEST 800 WATER TEMPERATURE ºC 1000 RE-ZERO YES/NO * YES/NO* OIL TYPE RESPONSE TESTS No.1 crude oil % M.F.S.V. = RECORDED ZERO RE-ZERO YES/NO* TIME mins RECALIBRATE YES/NO* TIME mins CLEAN YES/NO* TIME mins No.2 crude oil % M.F.S.V. = RECORDED ZERO RE-ZERO YES/NO* TIME mins RECALIBRATE YES/NO* TIME mins M.F.S.V. = MAXIMUM CLEAN YES/NO* FULL SCALE VALUE TIME mins * Delete as appropriate.

70 ANNEX 14 Page 34 READINGS (ppm) Indicated Measured Grab sample REMARKS No.3 crude oil % M.F.S.V. = RECORDED ZERO RE-ZERO YES/NO TIME mins RECALIBRATE YES/NO* TIME mins CLEAN YES/NO* TIME mins No.4 crude oil % M.F.S.V. = RECORDED ZERO RE-ZERO YES/NO* TIME mins RECALIBRATE YES/NO* TIME mins CLEAN YES/NO* TIME mins No.5 crude oil % M.F.S.V. = RECORDED ZERO RE-ZERO YES/NO* TIME mins RECALIBRATE YES/NO* TIME mins CLEAN YES/NO* TIME mins Delete as appropriate.

71 ANNEX 14 Page 35 Marine residual fuel oil READINGS (ppm) Indicated Measured Grab sample 15 RMG 35- ISO REMARKS 90% M.F.S.V. = RECORDED ZERO RE-ZERO YES/NO TIME mins RECALIBRATE YES/NO* TIME mins CLEAN YES/NO* TIME mins Automotive gasoline % M.F.S.V. = RECORDED ZERO RE-ZERO YES/NO* TIME mins RECALIBRATE YES/NO* TIME mins CLEAN YES/NO* TIME mins Delete as appropriate.

72 ANNEX 14 Page 36 READINGS (ppm) Indicated Measured Grab sample REMARKS Kerosene % M.F.S.V. = RECORDED ZERO RE-ZERO YES/NO TIME mins RECALIBRATE YES/NO* TIME mins CLEAN YES/NO* TIME mins Marine distillate fuel oil DMA-ISO % M.F.S.V. = RECORDED ZERO RE-ZERO YES/NO* TIME mins RECALIBRATE YES/NO* TIME mins CLEAN YES/NO* TIME mins Note: If alternative oils covering the same range of properties as the crude oils listed are used, these should be substituted where applicable. Delete as appropriate.

73 ANNEX 14 Page 37 OIL-LIKE NOXIOUS LIQUID SUBSTANCES, OTHER PRODUCTS OR APPLICATIONS READINGS (ppm) Indicated Measured Grab sample REMARKS Name of product % M.F.S.V. = RECORDED ZERO RE-ZERO YES/NO TIME mins RECALIBRATE YES/NO** TIME mins CLEAN YES/NO** TIME mins Name of product % M.F.S.V. = RECORDED ZERO RE-ZERO YES/NO** TIME mins RECALIBRATE YES/NO** TIME mins CLEAN YES/NO** TIME mins This page should be included in the certificate only if the oil content meter has been tested against category C or D oil-like noxious liquid substances. Delete as appropriate.

74 ANNEX 14 Page 38 RESPONSE TIMES First detectable reading seconds 63 ppm 1 90 ppm Stabilized maximum reading or 100 ppm.. ppm First detectable drop 37 ppm 2 10 ppm Stabilized minimum reading.. ppm RESPONSE TIME = =

75 ANNEX 14 Page 39 OIL FOULING AND CALIBRATION SHIFT 10% oil concentration test First detectable response seconds 15 ppm 100 ppm Off scale on highest range On scale on highest range 100 ppm 15 ppm Minimum reading.. ppm Further cleaning required YES/NO (State extent) Time. mins 100% oil concentration test seconds First detectable response 15 ppm 100 ppm.. Off scale on highest range On scale on highest range 100 ppm 15 ppm Minimum reading.. ppm Further cleaning required YES/NO* (State extent) Time. mins Calibration shift.. ppm Delete as appropriate.

76 ANNEX 14 Page 40 CONTAMINANT TEST Meter reading shift with 300 ppm non-oil contaminants mixed with water and No.2 crude oil in oil concentrations of: - 15 ppm...ppm ppm...ppm ppm...ppm AIR ENTRAINMENT TEST Meter reading shift with 1% air entrained in water and No.2 crude oil added in concentrations of: - 15 ppm...ppm ppm...ppm ppm...ppm OIL PARTICLE SIZE TEST Meter reading shift...ppm TEMPERATURE TEST Calibration test water temperature... ºC Meter reading shift at 10 C Meter reading shift at 65 C...ppm...ppm SAMPLE PRESSURE OR FLOW TEST Meter reading shift at 50 of normal Meter reading shift at 200 of normal...ppm...ppm Deviations from this test should be stated if necessary SHUT-OFF TEST Meter reading before shut off Meter reading after start-up (minimum dry period 8 hours)...ppm...ppm Damage to meter as follows:

77 ANNEX 14 Page 41 UTILITIES SUPPLY VARIATION TEST 110% voltage effects... 90% voltage effects % air pressure effects... 90% air pressure effects % hydraulic pressure effects... 90% hydraulic pressure effects... OTHER COMMENTS CALIBRATION AND ZERO DRIFT TEST Calibration drift Zero drift...ppm...ppm SHUTDOWN AND RE-ENERGIZATION TEST Span drift Zero drift Time for warm-up and calibration...ppm...ppm..mins Signed Date Official stamp (Official stamp or equivalent identification and the date of approval to be placed on all pages of the test protocol) ***

78

79 ANNEX 15 RESOLUTION MEPC.109(49) Adopted on 18 July 2003 TRIPARTITE AGREEMENTS THE MARINE ENVIRONMENT PROTECTION COMMITTEE, NOTING regulation 3(4) of Annex II to MARPOL 73/78, which describes the procedure for obtaining a provisional assessment of liquid substances carried in bulk which have not been categorized under paragraph (1) of this regulation, NOTING ALSO that unified interpretations 2A.1 describes, in detail, the procedure to be carried out in order to obtain such a provisional assessment, RECOGNIZING that for the Government of the State Party to MARPOL 73/78 shipping or producing the substance to be provisionally assessed needs to be able to contact the Government of the State in whose port the cargo will be received and the Government of the flag State involved in transporting the substance, RECOGNIZING ALSO that such contact points are published by the Organization in MEPC.2 circulars, which are updated every year in December, NOTING the difficulties experienced by some States in contacting other States which have not informed the Organization of their contact details to be included in the MEPC.2 circulars, 1. AGREES that those contact points which have not informed the Organization of their latest contact details should be deemed to have accepted the tripartite agreements whilst other contact points should still follow the Unified Interpretations 2A.1.4 and 2A.1.6 of regulation 3(4) of Annex II to MARPOL 73/78; 2. AGREES ALSO to review the application of this agreement at a future date. ***

80

81 ANNEX 16 RESOLUTION MEPC.110(49) Adopted on 18 July 2003 REVISED INTERIM GUIDELINES FOR THE APPROVAL OF ALTERNATIVE METHODS OF DESIGN AND CONSTRUCTION OF OIL TANKERS UNDER REGULATION 13F(5) OF ANNEX I OF MARPOL 73/78 THE MARINE ENVIRONMENT PROTECTION COMMITTEE, RECALLING Article 38(a) of the Convention on the International Maritime Organization concerning the functions of the Marine Environment Protection Committee (the Committee) conferred upon it by international conventions for the prevention and control of marine pollution, NOTING resolution MEPC.52(32) by which the Committee adopted regulations 13F and 13G and related amendments to Annex I of MARPOL 73/78, NOTING ALSO resolution MEPC.66(37) by which the Committee adopted the Interim Guidelines for the approval of alternative methods of design and construction of oil tankers under regulation 13F(5) of annex I of MARPOL 73/78, NOTING FURTHER that by resolution MEPC.66(37), the Committee resolved to keep the Interim Guidelines under review and to develop final guidelines in the light of experience, HAVING CONSIDERED, at its forty-ninth session, the recommendation made by the Sub-Committee on Bulk Liquids and Gases, 1. ADOPTS the Revised Interim Guidelines for the approval of alternative methods of design and construction of oil tankers under regulation 13F(5) of Annex I of MARPOL 73/78, the text of which is set out in the Annex to the present resolution; 2. INVITES Member Governments to give due consideration to the Revised Interim Guidelines when evaluating other methods of design and construction of oil tankers as alternatives to the requirements prescribed in regulation 13F(5) of Annex I of MARPOL 73/78 for submission of such designs to the Committee for approval; 3. AGREES to keep the Revised Interim Guidelines under review in the light of experience gained; 4. INVITES the Maritime Safety Committee to note the Revised Interim Guidelines; 5. URGES Member Governments to bring the aforementioned Revised Interim Guidelines to the attention of shipbuilders, shipowners, ship operators and other parties concerned with the design, construction and operation of oil tankers with a view to encouraging their use for oil tankers constructed on or after 1 April 2005; 6. REVOKES resolution MEPC.66(37).

82 ANNEX 16 Page 2 ANNEX REVISED INTERIM GUIDELINES FOR THE APPROVAL OF ALTERNATIVE METHODS OF DESIGN AND CONSTRUCTION OF OIL TANKERS UNDER REGULATION 13F(5) OF ANNEX I OF MARPOL 73/78 Preamble 1 The purpose of these Revised Interim Guidelines, hereunder referred to as "the Guidelines'', is to provide an international standard for the evaluation and approval of alternative methods of design and construction of oil tankers under regulation 13F(5) of Annex I of MARPOL 73/78. 2 The basic philosophy of the Guidelines is to compare the oil outflow performance in case of collision or stranding of an alternative tanker design to that of reference double-hull designs complying with regulation 13F(3) on the basis of a calculated pollution-prevention index. 3 The oil outflow performance of double-hull tankers which comply with regulation 13F(3) may be different. The longitudinal subdivision of the cargo tanks has a major influence on the oil outflow in case of inner hull penetration. The selected reference double-hull designs exhibit a favourable oil outflow performance. 4 The calculation of oil outflow is based on the probabilistic methodology and best available tanker accident damage statistics. Reappraisal of the Guidelines may be appropriate when more information on tanker accident damage has become available and more experience with the application of these Guidelines has been gained. 5 Falling tides will have an adverse effect on oil outflow from a stranded tanker and the Guidelines take account of this. The tide values specified in section 5 represent realistic average tidal changes which have been chosen to identify the influence of tidal changes on the oil outflow in case of stranding. 1 General 1.1 Regulation 13F of Annex I of MARPOL 73/78 specifies structural requirements for new tankers of 600 dwt and above, contracted on or after 6 July Paragraph (3) of the regulation requires tankers of 5,000 dwt and above to be equipped with double hulls. Various detailed requirements and permissible exceptions are given in the regulation. Paragraph (5) of the regulation specifies that other designs may be accepted as alternatives to double hull, provided they give at least the same level of protection against oil pollution in the event of collision or stranding and are approved in principle by the Marine Environment Protection Committee (MEPC) based on Guidelines developed by the Organization. 1.2 These Guidelines should be used to assess the acceptability of alternative oil tanker designs of 5,000 dwt and above with regard to the prevention of oil outflow in the event of collision or stranding as specified in paragraph (5) of regulation 13F.

83 ANNEX 16 Page For any alternative design of an oil tanker not satisfying regulation 13F(3) or (4), a study of the cargo oil outflow performance should be carried out as specified in sections 4 through 6 of these Guidelines. 1.4 This study should cover the full range of ship sizes with a minimum of four different ship sizes, unless the approval is requested for only a limited range of vessel sizes. Data for four reference double-hull designs are given in section Evaluation of the cargo oil outflow performance of the proposed alternative design should be made by calculating the pollution-prevention index E, as outlined in section 4 of these Guidelines. 1.6 The probabilistic methodology for the calculation of oil outflow according to these Guidelines is based on available tanker casualty statistics. With the collection of additional statistical material, the damage density distribution functions specified in paragraph 5.2 should be periodically reviewed. 1.7 In principle, and as far as applicable, the requirements of paragraphs (3)(d)-(f), (6) and (8) of regulation 13F apply also to alternative designs. The requirements of paragraph (9) of regulation 13F also applies to alternative designs. In addition, it should be demonstrated by means of a risk analysis that the new design under consideration provides an adequate safety level. Such analysis should address any specific risks associated with the alternative design and, if there are any, it should be demonstrated that safe solutions exist to cope with them. 2 Applicability 2.1 These Guidelines apply to the assessment of alternative designs of oil tankers to be constructed of steel or other equivalent material, as required by SOLAS regulation II-2/11. Designs for tankers intended to be constructed of other materials or incorporating novel features (e.g. non-metallic materials) or designs which use impact-absorbing devices should be specially considered. 2.2 The approval procedure of these Guidelines applies to oil tankers of sizes up to 350,000 dwt. For larger sizes the approval procedure should be specially considered. 3 Approval procedure for alternative tanker designs 3.1 An Administration which receives a request for approval of an alternative tanker design for the purpose of complying with regulation 13F, should first evaluate the proposed design and satisfy itself that the design complies with these Guidelines and other applicable regulations of MARPOL Annex I. That Administration should then submit the proposal and the supporting documentation, together with its own evaluation report, to the Organization for evaluation and approval of the design concept by the MEPC as an alternative to the requirements of regulation 13F(3). Only design concepts which have been approved in principle by the MEPC are allowed for the construction of tankers to which regulation 13F(5) applies.

84 ANNEX 16 Page The submission to the Administration and the Organization should at least include the following items:.1 detailed specification of the alternative design concept;.2 drawings showing the basic design of the tank system and, where necessary, of the entire ship;.3 study of the oil outflow performance as outlined in paragraphs 1.3 to 1.5;.4 risk analysis as outlined in paragraph 1.7;.5 details of the calculation procedure or computer program used for the probabilistic oil outflow analysis to satisfy the Administration that the calculation procedure used gives satisfactory results. For verification of the computer program see paragraph 6.2. Any additional information may be required to be submitted if deemed necessary. 3.3 In addition to the approval procedure for the design concept specified in paragraphs 3.1 and 3.2 above, the final shipyard design should be approved by the Flag State Administration for compliance with these Guidelines and all other applicable regulations MARPOL Annex I. This should include survivability considerations as referred to in paragraph Any approved design concept will require reconsideration if the Guidelines have been amended. 4 Oil outflow analysis 4.1 General The oil pollution prevention performance of a tanker design is expressed by a non-dimensional oil pollution prevention index E which is a function of the three oil outflow parameters: probability of zero oil outflow, mean oil outflow and extreme oil outflow. The oil outflow parameters should be calculated for all conceivable damage cases within the entire envelope of damage conditions as detailed in section The three oil outflow parameters are defined as follows:.1 Probability of zero oil outflow. This parameter represents the probability that no cargo oil will escape from the tanker in case of collision or stranding. If, e.g., the parameter equals 0.6, in 60% of all collision or stranding accidents no oil outflow is expected to occur..2 Mean oil outflow parameter. The mean oil outflow represents the sum of all outflow volumes multiplied by their respective probabilities. The mean oil outflow parameter is expressed as a fraction of the total cargo oil capacity at 98% tank filling.

85 ANNEX 16 Page 5.3 Extreme oil outflow parameter. The extreme oil outflow is calculated - after the volumes of all outflow cases have been arranged in ascending order - as the sum of the outflow volumes between 0.9 and 1.0 cumulative probability, multiplied by their respective probabilities. The value so derived is multiplied by 10. The extreme oil outflow parameter is expressed as a fraction of the total cargo oil capacity at 98% tank filling In general, consideration of ship's survivability will not be required for the conceptual approval of an alternative design. This may, however, be required in special cases, depending on special features of the design. 4.2 Pollution-prevention index The level of protection against oil pollution in the event of collision or stranding as compared to the reference double-hull designs should be determined by calculation of the pollution-prevention index E as follows: where: E = k 1 P O /P OR + k 2 ( O MR )/( O M ) + k 3 ( O ER )/( O E ) 1.0 (4.2) k 1, k 2 and k 3 are weighting factors having the values: k 1 = 0.5 k 2 = 0.4 k 3 = 0.1 P O = probability of zero oil outflow for the alternative design O M = mean oil outflow parameter for the alternative design O E = extreme oil outflow parameter for the alternative design P OR, O MR and O ER are the corresponding parameters for the reference double-hull design of the same cargo oil capacity as specified in section Calculation of oil outflow parameters The oil outflow parameters P O, O M and O E should be calculated as follows: Probability of zero oil outflow, P O : n P O = P i K i (4.3-1) i=1 where: i represents each compartment or group of compartments under consideration, running from i = 1 to i = n P i accounts for the probability that only the compartment or group of compartments under consideration are breached K i equals 0 if there is oil outflow from any of the breached cargo spaces in i. If there is no outflow, K i equals 1.

86 ANNEX 16 Page 6 Mean oil outflow parameter, O M : n O M = (P i O i )/C (4.3-2) i=1 where: O i = combined oil outflow (m 3 ) from all cargo spaces breached in i C = total cargo oil capacity at 98% tank filling (m 3 ) Extreme oil outflow parameter, O E : n O E = 10 (P ie O ie )/C (4.3-3) i =1 where the index ie represents the extreme outflow cases, which are the damage cases falling within the cumulative probability range between 0.9 and 1.0 after they have been arranged as specified in paragraph Assumptions for calculating oil outflow parameters 5.1 General The assumptions specified in this section should be used when calculating the oil outflow parameters Outflow parameters should be calculated independently for collisions and strandings and then combined as follows: of the computed value for collisions; and of the computed value for strandings For strandings, independent calculations should be done for 0 m and 2.5 m fall in tide. Outflow parameters for the stranded conditions should be a weighted average, calculated as follows:.1.7 for 0 m tide condition; and for 2.5 m fall in tide condition The damage cases and the associated probability factor P i for each damage case should be determined based on the damage density distribution functions as specified in paragraph The following general assumptions apply for the calculation of outflow parameters:.1 The ship should be assumed loaded to the load line draught d s with zero trim and heel. All cargo tanks should be assumed loaded to 98% of their volumetric capacity. The nominal density of the cargo oil should be calculated as follows: ρ n = 1000 (DW)/C (kg/m 3 ) ( )

87 ANNEX 16 Page 7.2 For the purposes of these outflow calculations, the permeability of each space within the cargo block, including cargo tanks, ballast tanks and other non-oil spaces should be taken as 0.99, unless proven otherwise..3 For all cases of collision damage, the entire contents of all damaged cargo oil tanks should be assumed to be spilled into the sea, unless proven otherwise..4 For all stranded conditions, the ship should be assumed aground on a shelf. Assumed stranded draughts prior to tidal change should be equal to the initial intact draughts. Should the ship trim or float free due to the outflow of oil, this should be accounted for in the calculations for the final shipyard design..5 In general, an inert gas overpressure of 0.05 bar gauge should be assumed if an inert gas system is fitted, otherwise the inert gas overpressure should be taken as zero..6 For the calculation of oil outflow in case of stranding, the principles of hydrostatic balance should apply, and the location of damage used for calculations of hydrostatic pressure balance and related oil outflow calculations should be the lowest point in the cargo tank..7 For cargo tanks bounded by the bottom shell, unless proven otherwise, oil outflow equal to 1% of the volume of the damaged tank should be assumed to account for initial exchange losses and dynamic effects due to current and waves..8 For breached non-cargo spaces located wholly or in part below breached cargo oil tanks, the flooded volume of these spaces at equilibrium should be assumed to contain 50% oil and 50% seawater by volume, unless proven otherwise..9 If deemed necessary, model tests may be required to determine the influence of tidal, current and swell effects on the oil outflow performance..10 For ship designs which incorporate cargo transfer systems for reducing oil outflow, calculations should be provided illustrating the effectiveness of such devices. For these calculations, damage openings consistent with the damage density distribution functions defined in paragraph 5.2 should be assumed..11 Where, for the final shipyard design referred to in 3.3 and in the special cases referred to in paragraph 4.1.3, damage stability calculations are required, the following should apply: A damage stability calculation should be performed for each damage case. The stability in the final stage of flooding should be regarded as sufficient if the requirements of MARPOL regulation I/25(3) are complied with. Should the ship fail to meet the survivability criteria as defined in MARPOL regulation I/25(3), 100% oil outflow from all cargo tanks should be assumed for that damage case.

88 ANNEX 16 Page Damage assumptions General, definitions The damage assumptions for the probabilistic oil outflow analysis are given in terms of the damage density distribution functions specified in paragraphs and These functions are so scaled that the total probability for each damage parameter equals 100% (i.e. the area under each curve equals 1.0). The location of a damage refers always to the centre of a damage. Damage location and extent to an inner horizontal bottom or vertical bulkhead should be assumed to be the same as the statistically derived damage to the outer hull. The location and extent of damage to compartment boundaries should be assumed to be of rectangular shape, following the hull surface in the extents defined in paragraphs and The following definitions apply for the purpose of paragraphs and x = dimensionless distance from A.P. relative to the ship s length between perpendiculars y = dimensionless longitudinal extent of damage relative to the ship s length between perpendiculars z t = dimensionless transverse penetration extent relative to the ship s breadth z v = dimensionless vertical penetration extent relative to the ship s depth z l = dimensionless vertical distance between the baseline and the centre of the vertical extent z v relative to the distance between baseline and deck level (normally the ship s depth) b = dimensionless transverse extent to bottom damage relative to the ship s breadth b l = dimensionless transverse location of bottom damage relative to the ship s breadth Side damage due to collision Function for longitudinal location: f S1 = 1.0 for 0 x 0.1; Function for longitudinal extent: f S2 = y for y 0.1 f S2 = y for 0.1 < y 0.2 f S2 = 0.35 for 0.2 < y 0.3; Function for transverse penetration: f S3 = z t for z t 0.05 f S3 = z t for 0.05 < z t 0.1 f S3 = 0.56 for 0.1 < z t 0.3;

89 ANNEX 16 Page 9 Function for vertical extent: f S4 = z v for z v 0.3 f S4 = 0.5 for z v > 0.3 Function for vertical location: f S5 = z l for z l 0.25 f S5 = 5z l for 0.25 < z l 0.5 f S5 = 1.50 for 0.5 < z l 1.0. Graphs of the functions f S1, f S2, f S3, f S4 and f S5 are shone in figures 1 and Bottom damage due to stranding Function for longitudinal location: f b1 = x for x 0.5 f b1 = 4x 1.4 for 0.5 < x 1.0; Function for longitudinal extent: f b2 = y for y 0.3 f b2 = 0.5 for 0.3 < y 0.8; Function for vertical penetration: f b3 = z v for z v 0.1 f b3 = 1.1 for 0.1 < z v 0.3; Function for transverse extent: f b4 = b for b 0.3 f b4 = 0.4 for 0.3 < b 0.9 f b4 = 12b 10.4 for b > 0.9; Function for transverse location: f b5 = 1.0 for 0 b Graphs of the functions f b1, f b2, f b3, f b4 and f b5 are shone in figures 3 and 4. 6 Probabilistic methodology for calculating oil outflow 6.1 Damage cases Using the damage probability distribution functions specified in paragraph 5.2, all damage cases n as per paragraph 4.3 should be evaluated and placed in ascending order of oil outflow. The cumulative probability for all damage cases should be computed, being the running sum of probabilities beginning at the minimum outflow damage case and proceeding to the maximum outflow damage case. The cumulative probability for all damage cases should be 1.0.

90 ANNEX 16 Page For each damage case the damage consequences in terms of penetrations (breaching) of cargo tank boundaries should be evaluated and the related oil outflow calculated. A cargo tank should be considered as being breached in a damage case under consideration if the applied damage envelope reaches any part of the cargo tank boundaries When determining the damage cases, it should be assumed for the purpose of these calculations that the location, extent and penetration of damages are independent of each other. 6.2 Oil outflow calculations The probabilistic oil outflow calculations may be done as outlined by the Example for the Application of the Revised Interim Guidelines given in the appendix to these Guidelines. Other calculation procedures may be accepted, provided they show acceptable accuracy The computer program used for the oil outflow analysis should be verified against the data for oil outflow parameters for the reference double-hull designs given in section After the final waterline has been determined, the oil outflow from each damaged cargo tank should be computed for each damage case under the assumptions specified in paragraph Reference double-hull designs 7.1 Data for four reference double-hull designs of 5,000 dwt, 60,000 dwt, 150,000 dwt and 283,000 dwt are summarized in tables 7.1 and 7.2 and are illustrated in figures 5 to 8. Table 7.1 also contains the data for the oil outflow parameters P OR, O MR and O ER to be used for the concept approval (ship survivability not considered). 7.2 Table 7.2 contains the corresponding data to be used for the shipyard design approval (ship survivability considered). Table Oil outflow parameters (ship survivability not considered) Reference design Deadweight Metric Tons Oil outflow parameters (ship survivability not considered) number P OR O MR O ER 1 5, , , , Table Oil outflow parameters (ship survivability considered) Reference design Deadweight Metric Tons Oil outflow parameters (ship survivability not considered) number P OR O MR O ER 1 5, , , , (The above tables replace existing tables 7.1 and 7.2)

91 ANNEX 16 Page 11 Figure 1 Side damage due to collision: density distribution functions f s1, f s2 and f s3

92 ANNEX 16 Page 12 Figure 2 Side damage due to collision: density distribution functions f s4 and f s5

93 ANNEX 16 Page 13 Figure 3 Bottom damage due to stranding: density distribution functions f b1, f b2 and f b3

94 ANNEX 16 Page 14 Figure 4 Bottom damage due to stranding: density distribution functions f b4, and f b5

95 ANNEX 16 Page 15 Figure 5 Reference double hull design no. 1 Deadweight: 5,000 dwt

96 ANNEX 16 Page 16 Figure 6 Reference double hull design no. 2 Deadweight: 60,000 dwt