SAFE OPERATING PROCEDURE (BUNKERING / FUEL TRANSFER OPERATIONS) REFERENCE: SS600:2008

SAFE OPERATING PROCEDURE (BUNKERING / FUEL TRANSFER OPERATIONS) REFERENCE: SS600:2008 CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 1 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER ONE DELIVERY BY BUNKER TANKERS CHAPTER ONE DELIVERY BY BUNKER TANKERS CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 2 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER ONE DELIVERY BY BUNKER TANKERS TABLE OF CONTENTS Section 1 - General 1.1 Scope..... 4 1.2 Normative References..... 4 1.3 Definitions..... 4 1.4 Ethical Practices and professionalism.. 6 1.5 Pre-delivery conference.. 6 1.6 Documentation..... 7 1.7 Bunker Specification..... 7 Section 2 Pre delivery checks and documentation 1.8 Bunker requisition form.. 8 1.9 Non-cargo tank declaration/inspection form.. 8 1.10 Tank gauging/calculation form.. 8 1.11 Sampling.. 9 Section 3 Bunkering Operation 1.12 Delivery procedure and documentation.. 10 Section 4 Post delivery checks and documentation 1.13 Tank gauging/calculation form.. 11 1.14 Verification of delivered quantity.. 11 1.15 Bunker delivery note (BDN).. 11 Section 5 Additional requirements for bunker tankers 1.16 Stock movement logbook.. 12 1.17 Bunker tanker s plan and diagram.. 12 1.18 Reducers and adoptors.. 12 Section 6 Others 1.19 Custody transfer sample for bunkers loaded into bunker tankers 13 1.20 Quality checks on debunkered products.. 13 1.21 Blending of products..... 13 1.22 Bunker Surveyor..... 13 1.23 Delay..... 14 1.24 Disputes..... 14 CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 3 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER ONE SECTION 1 General SECTION 1 GENERAL 1.1. Scope The scope of this Chapter One specifies the procedures and requirements for the delivery of bunker by bunker tankers to vessels in Port, including documentation, equipment and verification during a bunkering operation. It covers pre-delivery, actual delivery and post-delivery checks and documentation. 1.2. Normative References The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ASTM D1250 Standard guide for use of the petroleum measurement tables (equivalent to API MPMS Chapter 11.1/Adjunct to IP 200) Table 54B Generalised products, correction of volume to 15 o C against density at 15 o C Table 56 Kilograms per cubic metre at 15 o C and cubic metres at 15 o C per metric ton versus density at 15 o C ISO 91-1 ISO 2719 ISO 3104 Petroleum measurement tables Part 1: Tables based on reference temperatures of 15 o C and 60 o F Determination of flash point Pensky Martens closed cup method Petroleum products Transparent and opaque liquids Determination of kinematic viscosity and calculation of dynamic viscosity ISO 3675 Crude petroleum and liquid petroleum products Laboratory determination of density Hydrometer method ISO 3733 ISO 8217 ISO 12185 Petroleum products and bituminous materials Determination of Water Distillation method Petroleum products Fuels (Class F) Specifications of marine fuels Crude petroleum and petroleum products Determination of density Oscillating u-tube method IMO Regulations Regulations for the prevention of pollution from ships Annex VI of MARPOL 73/78 1.3. Definitions For this purpose of this Singapore Standard, the following definitions shall apply. 1.3.1. Authorized verifier Authorised verifiers (AVs) are qualified installers, manufacturers and repairers of weighing and measuring instruments who are designated to perform verification on weighing and measuring instruments for trade use. 1.3.2. Bunker craft operator The company which holds a valid bunkering license (bunker craft operator) issued by the implementing authority. CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 4 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER ONE SECTION 1 General 1.3.3. Bunker delivery note (BDN) A proprietary document of the bunker supplier providing details of the quality and quantity of the bunker(s) received by the vessel. 1.3.4. Bunker supplier The company which holds a valid bunkering license (bunker supplier) issued by the implementing authority. 1.3.5. Bunker surveyor The person who holds a valid bunker surveyor license issued by the implementing authority. 1.3.6. Bunker tanker The bunker barge or tanker supplying bunker(s) to the vessel. 1.3.7. Bunker(s) Marine fuel oil (MFO) or Marine diesel oil (MDO) or Marine gas oil (MGO) for vessel s use. 1.3.8. Cargo officer An individual who represents the bunker supplier and is responsible for bunkering operations and documentations. (as amended June 2012) 1.3.9. Chief engineer 1.3.10. FOB The chief engineer of the vessel or his representative who is responsible for receiving bunkers and documentation of the bunkering operations. Free on board 1.3.11. Free Water The water that exists as a separate phase. 1.3.12. Gross observed volume (GOV) The volume of oil including emulsified water and suspended sediment but excluding free water measured at the oil temperature and pressure prevailing. 1.3.13. Gross standard volume (GSV) The volume of oil including emulsified water and suspended sediment but excluding free water and bottom sediment, measured at standard conditions i.e. volume corrected by appropriate volume correction factor for the observed temperature and density at 15 o C, to the standard temperature of 15 o C. 1.3.14. Master The master of the bunker tanker or the vessel receiving bunker(s) as the case may be. 1.3.15. Oil-indicating paste A paste containing a chemical that changes colour in contact with oil. The paste, when applied to a gauging tape, gives an indication of the level of oil in the tank. 1.3.16. Sample A product specimen collected in compliance with this standard and representative of the bunker(s) supplied. 1.3.17. Sediment Solid materials that may include a combination of sand, rust and scale. CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 5 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER ONE SECTION 1 General 1.3.18. Total observed volume Volume of oil including total water and total sediment, measured at the prevailing oil temperature and pressure. 1.3.19. Vessel The vessel receiving bunker(s) 1.3.20. Water indicating paste A paste containing chemical that changes colour in contact with water. The paste, when applied to a gauging tape, gives an indication of the level of free water in the tank. 1.3.21. Use of may, shall and should 1.3.21.1. May means a possible method or action 1.3.21.2. Shall means a mandatory requirement 1.3.21.3. Should means a preferred method or action 1.4. Ethical practices and professionalism 1.4.1. Bunker suppliers, bunker craft operators, cargo officers, Chief Engineers, bunker surveyor and any other parties that have interest in the bunker transaction shall not engage in any unethical, fraudulent or other illegal practices. In the event of any inducement to participate in such activities, it should immediately be reported to the implementing authority. 1.4.2. Bunker suppliers, bunker craft operators, cargo officers, chief engineers and bunker surveyors shall comply with all safe working practices and at all times during the bunker delivery. Act responsibly and professionally. 1.5. Pre-delivery conference Prior to commencement of the bunker delivery, a pre-delivery conference shall be conducted between the representatives of the bunker tanker, vessel and bunker surveyor, if engaged. Such conference shall include safety, health and environmental checks, review of the pre-delivery safety checklist and establishing communication links. 1.5.1. Safety, Health and Environment 1.5.1.1. The requirements to be observed by all personnel of the bunker tanker and vessel for the safe transfer of bunkers are set out in Annex A. Internationally accepted safety standards should also be observed. 1.5.1.2. The respective masters of the bunker tanker and the vessel shall remain at all times responsible for the safety of their vessel, crew, cargo and equipment and should not permit safety to be prejudiced by the actions of the others. 1.5.1.3. Effective communication means as well as emergency shutdown requirements as set out in A.3.5 and A.3.6 and hand signals as set out in Annex B shall be pre-agreed between the bunker supplier and the vessel. A copy of the hand signal diagrams should be given to the Chief Engineer prior to the commencement of the bunkering operation. 1.5.2. Bunkering Pre-delivery safety checklist 1.5.2.1. The bunker pre-delivery safety checklist as set out in Annex C shall be completed and signed by the cargo officer and the Chief Engineer with their names clearly printed. 1.5.2.2. All items in this checklist shall be completed. 1.5.2.3. Any cancellation or amendment of this checklist shall be signed by the cargo officer and the Chief Engineer. 1.5.2.4. At least two copies of this checklist shall be completed and signed. The original shall be retained by the cargo officer and the duplicate shall be given to the Chief Engineer. CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 6 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER ONE SECTION 1 General 1.6. Documentation 1.6.1. A complete bunkering operation shall include the following documentation: a) Bunker Requisition form b) Non-cargo tank declaration/inspection form c) Tank gauging/calculation form d) Bunker Delivery note Bunker suppliers shall have all these documents available on board the bunker tanker(s) 1.6.2. The cargo officer shall prepare the documents for the chief engineer without being asked to do so. 1.6.3. Bunker suppliers may have their own formats for the documents as set out in 1.6.1, but the information as set out in 1.8, 1.9, 1.10 and 1.15 shall be provided. These documents shall not contain terms which are inconsistent with this standard. Recommended examples of the documents are given in Annexes D, E, F and G. 1.6.4. Bunker suppliers shall not issue for a bunkering operation, any other documents which are inconsistent with this standard or any international regulations. 1.7. Bunker Specifications 1.7.1. Bunker Supplier shall, unless otherwise agreed by the buyer, supply bunker(s) of a quality which conforms to or is better than the standards set by the International Organization for Standardization (ISO) for Petroleum products Fuels (Class F) Specifications of marine Fuels (ISO 8217) [as amended June 2012]. The values of hydrogen sulphide and oxidation stability shall be stated in the certificate of quality issued by the cargo provider based on samples taken at the cargo source. These two values shall be within the limits prescribed in ISO 8217. For any contracted grade of bunker(s) which is not specified in ISO 8217, the bunker supplier and the buyer shall have prior written agreement with respect to the bunker specifications. The bunker supplier shall warrant that the bunker(s) is/are homogeneous and stable. 1.7.2. Shipowners/buyers are strongly advised to enter into agreed detailed specifications in their contract with bunker suppliers. Shipowners/buyers are reminded that if no detailed specifications are agreed upon, this may prejudice any subsequent claims in the event of a dispute. CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 7 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER ONE SECTION 2 Pre delivery checks & Doc. SECTION 2 PRE-DELIVERY CHECKS AND DOCUMENTATION 1.8. Bunker Requisition form 1.8.1. This pre-delivery document shall be completed and signed by the cargo officer and the Chief Engineer. The bunker requisition form is not intended to vary the terms of any pre-existing contract between the buyer and the bunker supplier. 1.8.2. This form shall contain the information as set out in Annex D. 1.8.3. If more than one grade of bunker(s) are to be supplied, the cargo officer shall indicate on the form the order in which the grades are to be supplied. To avoid contamination of the product, it is recommended that the lighter grade should be supplier first followed by the heavier grade, unless otherwise requested by the Chief Engineer in writing. 1.8.4. The cargo officer shall confirm with the Chief Engineer the requirements of the vessel including the quantity, grade of bunker(s) and pumping rate. 1.8.5. All items in this form shall be completed and signed by the cargo officer and the chief engineer with their names clearly printed. This form shall be endorsed with the bunker supplier s stamp and the vessel s stamp. 1.8.6. Any cancellation or amendment on this form shall be signed by the cargo officer and the chief engineer. 1.8.7. At least two copies of this form shall be completed and signed. The original shall be retained by the bunker supplier and duplicate shall be given to the chief engineer. 1.9. Non-cargo tank declaration/inspection form 1.9.1. The non-cargo tank declaration/inspection form is declaration by the cargo officer on the gauging and contents of the non-cargo tanks and spaces. 1.9.2. This form shall contain the information as set out in Annex E. 1.9.3. Part I of the non-cargo tank declaration/inspection form is declaration by the cargo officer before bunkering commences. The cargo officer shall invite the chief engineer, if engaged to inspect and/or gauge the tanks and verify the declaration. Part I shall be endorsed by the cargo officer and the chief engineer with their names, date and time of signing clearly printed. This form shall be endorsed with the bunker suppliers stamp and vessel s stamp. 1.9.4. In the event of quantity dispute, the chief engineer or bunker surveyor (if engaged) shall be allowed to inspect, gauge, and verify all non-cargo tanks on the bunker tanker and the cargo officer shall record and complete Part II of the non-cargo tank declaration/inspection form (Annex E). 1.9.5. Any cancellation or amendment on this form shall be signed by the cargo officer and the chief engineer. 1.9.6. At least two copies of this form shall be completed and signed. The original shall be retained by the bunker supplier and duplicate shall be given to the chief engineer. 1.10. Tank gauging/calculation form 1.10.1. The tank gauging/calculation form is to record tank gauging (or meter readings) and cargo temperature readings as witnessed by the chief engineer. 1.10.2. This form as set out in Annex F and shall be used by the cargo officer to record the calculation of the quantity in the tanks. The relevant API/ASTM/IP/ISO methods for gauging and measurement of petroleum products should be used for guidance. 1.10.3. The cargo officer shall invite the chief engineer to witness the opening gauge (or meter reading) and the taking of cargo temperature of all cargo tanks. CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 8 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER ONE SECTION 2 Pre delivery checks & Doc. 1.10.4. The chief engineer is strongly advised to witness the tank gauging of all the cargo tanks before the commencement of the bunkering operation. If the chief engineer declines the invitation, the cargo officer shall record this on the form and this shall be endorsed by the chief engineer. 1.10.5. The tank gauging procedure shall be as set out in Annex H. 1.10.6. If a flow meter is used instead of tank gauging, the flow meter must be verified by an authorized verifier. The bunker supplier shall carry the certificate of verification issued by an authorized verifier. The flow meter shall be verified at least once in every 12 months or earlier, if necessary. The seal of the flow meter by the authorized verifier shall be intact. Flow meter with broken verification seal is not allowed to use. 1.10.7. All items in Annex F shall be completed and signed by the cargo officer and the chief engineer with their names, date and time of signing clearly printed. This form shall be endorsed with the bunker supplier s stamp and the vessel s stamp. 1.10.8. Any cancellation or amendment on this form shall be signed by the cargo officer and the chief engineer. 1.10.9. At least two copies of this form shall be completed and signed. The original shall be retained by the bunker supplier and duplicate shall be given to the chief engineer. 1.11. Sampling 1.11.1. Collecting Samples Four samples shall be collected for the bunkering operation. A fifth sample shall be collected if a testing laboratory is engaged. If more samples are required, Shipowners/Bunker buyers and Bunker Suppliers shall have this requirement in their contractual agreement. The samples shall be distributed as follows: a. Two samples to the vessel (one of which is the MARPOL sample) b. One sample retained by bunker supplier c. One sample for bunker surveyor; and d. One sample for the testing laboratory, if engaged. 1.11.2. Sampling Requirements 1.11.2.1. All bunker suppliers shall comply with the sampling requirements as set out in Annex I 1.11.2.2. If the sampling requirements provided by the bunker supplier differ from those as set out in Annex I, the chief engineer shall make his comments in the Remark section of t he tank gauging / calculation form. 1.11.2.3. The sampling equipment used in the bunker delivery shall comply with the requirements as set out in Annex I. Examples of the design of sampling equipment is shown in Annex J. 1.11.3. Sampling Procedure The sampling procedure shall be as set out in Annex L 1. 1.11.4. Location of Sampling Equipment 1.11.4.1. Custody transfer sampling shall apply to all bunker deliveries based on FOB terms in the port. The custody transfer shall be taken at the manifold of the vessel. Should dispute arise, the custody transfer sample shall be the official sample for ascertaining the quality of the bunkers delivered. 1.11.4.2. If there are physical limitations or constraints at the bunker manifold of the vessel which make custody transfer sampling at the point impossible or impractical, the sampling may be carried out at the bunker manifold of the bunker tanker. Such an exception shall be properly recorded in the bunker requisition form and signed by the cargo officer and chief engineer. CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 9 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER ONE SECTION 3 Bunkering Operation SECTION 3 BUNKERING OPERATION 1.12. Delivery procedure and documentation 1.12.1. It shall be the chief engineer s responsibility to prepare the vessel for receiving bunker(s), including removal of the blank flange(s) from the vessel s bunker manifold(s). 1.12.2. Once the pre-delivery requirements have been completed and bunker hose(s) has/have been properly connected, bunkering operation shall commence after confirmation by the chief engineer. 1.12.3. The chief engineer shall have a crew member from the vessel to oversee the entire bunkering operation 1.12.4. The cargo officer to appoint a crew member from the bunker tanker to oversee the sampling process on the vessel jointly with the chief engineer at all times during the entire bunkering operation. 1.12.5. Communication between the bunker tanker and the vessel shall be maintained throughout the entire bunkering operation. 1.12.6. The cargo officer shall ensure that the agreed pumping rate is adhered to by the bunker tanker within the safe operating practices. The agreed pumping rate should not be exceeded unless requested by the chief engineer and duly endorsed by him. 1.12.7. When an order to stop pumping is given by the vessel, the bunker tanker shall stop the pumping immediately. 1.12.8. All stoppages and reasons for doing so shall be recorded in the bunker tankers log. 1.12.9. Line clearing of bunker hose(s) shall only be carried out at the end of the pumping operation. 1.12.10. After pumping operation is completed, the bunker(s) contained in the bunker hose(s) shall be cleared into the vessel s tank. The procedure for line clearing the bunker hose(s) is as follows: a. The cargo officer shall notify the chief engineer and bunker surveyor (if engaged) prior to the commencement of line clearing operation. b. The cargo officer shall close the discharge valve after the pump and build up the pressure in the pipeline by using bunker tanker s pump. c. Once the pressure is built up, the cargo officer shall open the discharge valve for the remaining bunker(s) in the bunker hose(s) to be cleared into the vessel s tank. 1.12.11. No air compressors or air bottles shall be used by the bunker tanker for the line clearing process. 1.12.12. The line clearing process shall not be repeated more than twice after the completion of the pumping operation. 1.12.13. Once the line clearing process is completed, the residue contents in the hose(s) shall be drained back into the bunker tanker before final gauging is taken. No re-pumping of bunkers shall be allowed, and post delivery checks and documentation shall commence. 1.12.14. During the entire bunkering process, no other bunker tanker shall be allowed to come alongside the bunker tanker delivering bunker(s) to the vessel, unless two different products are to be delivered to the vessel simultaneously. CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 10 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER ONE SECTION 4 Post delivery checks & Doc. SECTION 4 POST DELIVERY CHECKS AND DOCUMENTATION 1.13. Tank gauging / calculation form 1.13.1. The tank gauging / calculation form shall again be used in conjunction with the closing gauge (or meter reading) and the recording of cargo temperature of every tank. 1.13.2. On completion of the bunkering operation, the cargo officer shall invite the chief engineer to witness the closing gauge (or meter reading) and the cargo temperatures of all cargo tanks of the bunker tanker. 1.13.3. If the chief engineer has earlier indicated his intention to witness all gauges before delivery takes place but subsequently declines the invitation to witness the closing gauge, the cargo officer shall indicate the change on the bunker requisition form and such shall be endorsed by the chief engineer. 1.13.4. The procedure set out in 1.10.5 to 1.10.9 shall be followed for the closing gauge. 1.13.5. In the event of a quantity dispute, the procedures for verifying the contents and gauging of all tanks, including the non-cargo tanks as set out in 1.9.4 and 1.9.5 shall be followed. 1.14. Verification of delivered quantity 1.14.1. The delivered quantity shall be based on the bunker tanker s tank gauging and calculations as witnessed by both the cargo officer and the chief engineer. Where flow meters are used instead of tank gauging, the flow meter readings as witnessed by both the cargo officer and the chief engineer shall be used for the calculation of the quantity delivered. 1.14.2. The chief engineer shall verify the delivered quantity as stated in the bunker delivery note. The chief engineer is strongly advised to witness the tank gauging of all the cargo tanks on the bunker tanker after the completion of the bunker delivery. The calculations shall be based on the opening and closing gauges of the bunker tanker s tank and the cargo temperatures as witnessed by both the cargo officer and the chief engineer. The bunker tanker s certified tank calibration tables and ASTM D1250 Petroleum measurement Table 54B and Table 56 shall be made available by the cargo officer. 1.14.3. The bunker tanker shall carry its latest certified tank calibration. The cargo officer shall allow the chief engineer to make the photocopies of the relevant pages if the chief engineer so requests. 1.15. Bunker Delivery Note (BDN) 1.15.1. The BDN shall contain the information as set out in Annex G and shall comply with the IMO regulation 18 (3) of Annex VI MARPOL 73/78. 1.15.2. Upon completion of delivery, the cargo officer shall prepare the BDN for the chief engineer to sign. 1.15.3. The BDN shall bear the licensed bunker suppliers name and the valid bunker supplier license no. 1.15.4. All relevant and applicable columns of the BDN shall be filled in, and NA (meaning not applicable) shall be inserted in those blank columns. 1.15.5. Any cancellation or amendment on the BDN shall be endorsed and stamped by the cargo officer and the chief engineer. 1.15.6. At least two copies of the completed BDN shall be signed by the cargo officer and the chief engineer with their names clearly printed and stamped with the bunker tanker s stamp and vessel s stamp. 1.15.7. A copy of the tank gauging / calculation form shall be attached with the BDN. CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 11 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER ONE SECTION 5 Additional Requirements SECTION 5 ADDITIONAL REQUIREMENTS FOR BUNKER TANKERS 1.16. Stock movement logbook 1.16.1. Every bunker tanker shall keep and maintain a monthly stock movement logbook. An example of the format of the stock movement logbook is shown in Annex N. The logbook shall have the month properly stamped on the cover and shall contain sufficient pages for the daily stock movement activities for a month to be recorded. Every page of the logbook shall be serially numbered and each page shall be assigned for a day s entries. Any cancelled pages shall be crossed out and retained in the logbook. The logbook shall be properly bound to prevent removal of any pages. 1.16.2. The daily entries of the stock movement logbook shall contain the following: (as amended June 2012) a. Date and time of receipts and deliveries b. Product grade, quantity, tank numbers and source of receipts. c. Product grade, quantity, tank numbers and destination of deliveries. d. Description of documents evidencing receipts and/or deliveries e. Blending / Inter-tank transfer records f. Variances of receipts and deliveries g. Summary of the stock movement h. Name and signature of the person preparing the daily entries. 1.16.3. The cargo officer shall maintain the daily entries of the logbook. If there are no activities of the bunker tanker on a particular day, the cargo officer shall record so in the logbook. 1.16.4. Every stock movement of the bunker tanker, except for inter-tank transfers, shall be supported by a document duly executed and endorsed by the party concerned. The document reference shall be recorded accordingly in the logbook. 1.16.5. The cargo officer shall prepare the daily entries and sign the logbook with his name clearly stated within two hours of any stock movement. 1.16.6. The stock movement logbook shall be kept on board the bunker tanker for a minimum period of three months, counting from the current date, and shall be made available to the implementing authority upon request. 1.16.7. In the event of the quantity dispute, the relevant pages of the stock movement logbook showing all the stock movements related to the bunker delivery shall be made available for inspection and photocopying by the implementing authority, the chief engineer and/or bunker surveyor, if engaged. 1.17. Bunker Tanker s plan and diagram A general lay out of the bunker tanker shall be conspicuously displayed on board. The tank capacity plan, piping diagram and trim and list tables shall also be available on board for inspection by any party concerned. 1.18. Reducers and adaptors Bunker tanker(s) shall carry Japanese Industrial Standard (JIS) and American National Standards Institute (ANSI) standard reducers and adaptors on board to accommodate the different sizes of bunker manifold flanges on the vessels. The sizes of the reducers and adaptors carried would vary according to the Gross Tonnage (GT) of the tankers as follows: 500 GT and Below 501 to 1500 GT Above 1500 GT 80 mm and 3 inch 80 mm and 3 inch 100 mm and 4 inch 100 mm and 4 inch 100 mm and 4 inch 125 mm and 5 inch 125 mm and 5 inch 125 mm and 5 inch 150 mm and 6 inch 150 mm and 6 inch 150 mm and 6 inch 200 mm and 8 inch 200 mm and 8 inch 250 mm and 10 inch CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 12 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER ONE SECTION 6 Others SECTION 6 OTHERS 1.19. Custody transfer sample for bunkers loaded into bunker tankers 1.19.1. Bunker suppliers shall make an agreement with the cargo provider that a continuous drip sample is collected at the jetty loading arm when loading products into bunker tankers from the oil and storage terminals. The sampling requirements and procedures shall otherwise be in accordance with that stipulated in this standard. 1.19.2. Custody transfer shall also be collected bunker suppliers who load bunkers into their bunker tankers from other bunker supplier s bunker tankers. The retention period for such samples shall be in accordance with that stipulated in L.1.10 and L.2.10 of this standard. 1.20. Quality checks on debunkered products Bunker suppliers shall carry out quality checks on products received by the bunker tankers from all debunkering operations approved by the implementing authority, if the product received is to be subsequently re-supplied to vessels. Such quality checks shall ensure that the products received comply fully with the ISO 8217 standard including the general requirements. Bunker suppliers shall send the quality check report as issued by a recognized laboratory to the implementing authority. 1.21. Blending of products 1.21.1. Where blending of product is required, the blending should preferably be carried out ashore. 1.21.2. If onboard blending is required, the bunker supplier shall perform the blending well in advance of the bunker delivery. The bunker supplier shall warrant that the bunker blended shall be of homogeneous and stable nature. The quality of the blended product shall conform to the bunker specifications stated in 1.7.1. (as amended, June 2012) 1.21.3. In any event, in-tank blending shall not be carried out concurrently with the bunker delivery. 1.21.4. In-line blending onboard the bunker tanker is not permissible. 1.22. Bunker surveyor 1.22.1. The vessel and/or the bunker supplier may at its own cost engage a bunker surveyor to check and verify all phases of the bunkering operation. The master/cargo officer of the bunker tanker shall: a. Allow the bunker surveyor to board the bunker tanker b. Ensure that the bunker surveyor has a valid bunker surveyor license issued by the implementing authority. c. Facilitate the bunker survey throughout the whole bunkering operation. 1.22.2. The bunker surveyor (if engaged) shall: a. Show the valid bunker surveyor license to the chief engineer and the master/cargo officer without demand. b. Comply with the procedures set out in both chapters of this standard. c. Notify the cargo officer if there is any non-compliance with this standard for immediate action. If necessary, he should report any non-compliance of the bunkering operation or irregularities to the implementing authority in writing. CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 13 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER ONE SECTION 6 Others 1.23. Delay 1.23.1. No party shall cause any undue delay to either the bunker tanker or the vessel. 1.23.2. It shall be the chief engineer s responsibility to prepare the vessel for receiving bunker(s) including removal of the blank flange(s) from the bunker line manifold(s). 1.24. Disputes 1.24.1. Quantity Dispute 1.24.1.1. In the event of any dispute at the nd of the delivery with respect to the quantity of bunker(s) delivered, the chief engineer of the vessel should raise a note of protest, failing which, any such claim shall be deemed to be waived and barred. The note of protest [see Annex O, example (a)] shall be signed and stamped by both parties. 1.24.1.2. The master/cargo officer of the bunker tanker should also raise a note of protest [see Annex O example (b)] if he disagrees with the alleged shortage. 1.24.1.3. A copy of each of the note of protest raised by the bunker tanker and the vessel, together with a copy of the BDN, shall be sent to the implementing authority within 14 days after the bunker delivery. 1.24.2. Quality dispute 1.24.2.1. In the event of any dispute with respect to the quality of bunker(s) delivered, the vessel/buyer should tender a complaint in writing to the bunker supplier within 30 days (or such extended period as may be agreed between the parties) after the bunker delivery. 1.24.2.2. A copy of the complaint with a copy of the BDN should simultaneously be lodged with the implementing authority. 1.24.2.3. The parties shall have the quality of the mutually agreed sample analysed by a mutually agreed, independent and certified testing laboratory under the national accredited body in accordance with ISO Standard ISO 8217. For any grade of bunkers other than the categories specified by ISO 8217, the quality shall comply with the bunker specifications as agreed by the bunker supplier and the buyer prior to the bunkering operation. CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 14 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER TWO PROCEDURES FOR BUNKER SURVEYING CHAPTER TWO PROCEDURES FOR BUNKER SURVEYING CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 15 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER TWO PROCEDURES FOR BUNKER SURVEYING TABLE OF CONTENTS 2.0 Introduction..... 17 2.1 Scope..... 17 2.2 Normative References..... 17 2.3 Definitions..... 18 2.4 Documentation..... 18 2.5 Role of Bunker Surveyors.... 18 2.6 Professional Ethics..... 18 2.7 Safety, Health and Environment.... 19 2.8 Essential Equipment for bunker surveying.. 19 2.9 Survey Procedures..... 20 2.10 Sampling..... 25 2.11 Disputes..... 26 2.12 Reporting Requirements.... 27 CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 16 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER TWO PROCEDURES FOR BUNKER SURVEYING 2.0. INTRODUCTION This Singapore Standard is promulgated as an acceptable method of survey practice for bunker transfers. The standard provided herein is not intended to overrule any guidelines contained in any contract applicable recommended practices of other regulatory or standard bodies, or to conflict with safety and environmental considerations or local conditions. It is important that sufficient time is allocated by shipowners/buyers and suppliers for the thorough measurements required on the bunker tanker and vessel for the proper completion of the bunker survey. Where a bunker surveyor is engaged, the bunker tanker and vessel shall allow access to the surveyor to carry out his duties of measurement and sampling on the bunker tanker and vessel. In complying with this standard, bunker surveyors should note the following: a. For safety reasons, only appropriate and intrinsically safe equipment shall be used. b. Local regulations regarding loading/unloading including regulations on marine pollution shall be complied with. c. Measurement and sampling activities to be performed on board the vessel and bunker tanker shall be accomplished in the presence of and with the expressed permission of the master and the cargo officer, respectively, d. To ensure accuracy and verifiability of the survey results, the surveyor shall measure each tank personally for gauge and temperature. e. Bunker calculations shall be carried out independently by the responsible parties and/or authorized representatives. f. Any unresolved discrepancies relating to quality determinations and calculated quantities on board shall be recorded and reported to all interested parties in the form of a Statement of Fact and g. All data recordings shall follow strict procedures to ensure the validity if the surveyor s observations and that the data are recorded in a permanent written record at the time the procedures are performed. 2.1. SCOPE This chapter two describes a method for specifying practical procedures for bunker surveying on board bunker tankers and vessels. 2.2. NORMATIVE REFERENCES The referenced documents in Chapter 1.2 of Chapter One (Except ISO 91-1 and ISO 8217) and the following are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 8754 ISO 14596 SS 524 Petroleum products Determination of Sulfur content Energy-dispersive X-ray fluorescent spectrometry Petroleum products Determination of Sulfur content Wavelength dispersive X-ray fluorescent spectrometry Quality Management for bunker supply chain (QMBS) CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 17 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER TWO PROCEDURES FOR BUNKER SURVEYING 2.3. DEFINITIONS For the purpose of this Standard, the definitions in 1.3 of Chapter One shall apply. 2.4. DOCUMENTATION 2.4.1. A complete bunker survey operation shall include the following documentation that bears the name of the bunker surveying company accredited with the national accreditation body and the accreditation mark: a. Survey time-log b. Statement of Fact (if applicable) c. Pre-survey vessel acknowledgement d. Ship s measurement report e. Gauging ticket f. Surveyor s bunker tanker measurement report (inclusive of non-cargo tanks check) g. Meter delivery report (if applicable) and h. Sample witnessing and receipt 2.4.2. Bunker surveyors may have their own formats for the documents as set out in 2.4.1, but the information as set out in the relevant annexes shall be provided. These documents shall not contain terms in which are inconsistent with this standard. Examples of the documents are given in Annexes S, T, U, V, W, X, Y and AA. 2.4.3. The following documents should be obtained by the bunker surveyor in respect of the bunker surveying operation. a. Bunker Delivery note b. Copy of tank gauging/calculation form c. Copy of bunker requisition form d. Copy of non-cargo tank declaration/inspection form\ e. Note of protest from chief engineer (if applicable), and f. Note of protest from cargo officer 2.5. ROLE OF BUNKER SURVEYORS 2.5.1. Bunker Surveyors shall inspect, measure, sample, investigate and report as required on the bunkering operations. In carrying out their duties, the bunker surveyor shall comply with the procedures contained in this standard. 2.5.2. Bunker surveyors shall have an independent role over the concerned parties to ensure compliance with this standard. They shall report to the implementing authority on an non-compliance to this Singapore Standard or any irregularities to the bunkering operations. 2.6. Professional Ethics 2.6.1. Integrity Bunker surveyors shall not engage in any unethical, fraudulent or other illegal practices. In the event of any inducement to participate in such activities, it should immediately be reported to the appropriate authorities. CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 18 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER TWO PROCEDURES FOR BUNKER SURVEYING 2.6.2. Objectivity and Independence Bunker surveyor must be objective, impartial and free of conflicts of interest in the performance of their professional duties. They shall be independent and be seen to be independent when providing professional services and shall not be influenced by any third party during and after the bunkering operations. 2.6.3. Competence and due care Bunker surveyors should strive continually to improve their technical skills and services in order to keep their knowledge upto date. They must bring due care and diligence to bear upon the discharge of their duties. Bunker surveyors shall not undertake professional work which they are not competent to perform. When in doubt they shall obtain such advice and assistance as will enable them to carry out the work competently. 2.6.4. Confidentiality Bunker surveyors shall not disclose information acquired in the course of their professional work except where consent has been obtained or where there is a legal or professional duty to disclose. Bunker surveyors shall not use such information for their personal advantage or that of a third party. 2.6.5. Compliance Bunker surveyors shall comply with the standards by the Government, statutory authorities and other relevant authorities given the mandate to set standards. 2.7. Safety, health and environment 2.7.1. The bunker surveyor shall not be under the influence of any alcohol, drugs or other substances which impairs the safe and efficient execution of this work and personal health. 2.7.2. Bunker surveyors shall familiarize themselves and comply with all safety requirements on board the vessel or bunker tanker. 2.7.3. The requirements to be observed by all personnel of the bunker tanker and vessel for the safe transfer of bunkers in port are set out in Annex A. internationally accepted safety standards should also be observed. 2.7.4. The perspective masters of the bunker tanker and the vessel shall remain at all times responsible for the safety of their vessel, crew, cargo and equipment and should not permit safety to be prejudiced by the actions of others. 2.7.5. Effective communication means as well as emergency shut down requirements as set out in A.3.5 and A.3.6 and hand signals as set out in Annex B shall be pre-agreed between the bunker tanker and the vessel. A copy of the hand signal should be given to the chief engineer prior to the commencement of the bunkering operation. 2.8. Essential equipment for bunker surveying 2.8.1. Bunker surveyors shall equip themselves with the following items when attending a bunker survey: a. Gauging tape of approved standard and accuracy b. Electronic thermometer or thermometer of accepted international standards such as ASTM or ISO. It is advisable to carry a spare battery for the electronic type. c. Flashlight (if applicable) d. Water and/or oil indicating pastes and e. Sample bottle with caps, seals and labels which comply with the sampling requirements as set out in Annex I 2.8.2. Gauging tapes and thermometers used by bunker surveyors shall be calibrated and show appropriate levels of traceability on the accuracy of these equipment CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 19 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER TWO PROCEDURES FOR BUNKER SURVEYING 2.8.3. All electronic and electrical equipment shall be intrinsically safe. If a camera is brought on board by the bunker surveyor, prior consent of the master of the bunker tanker/vessel should be obtained for its use. 2.8.4. Bunker surveyors shall equip themselves with the following minimum safety items: safety helmet, safety shoes and gloves, H 2 S and O 2 monitors and life jacket. They shall wear personal protective equipment at all times while onboard the vessel and the bunker tanker. 2.8.5. Bunker surveyor may use the bunker tanker measuring equipment in conjunction with SS524:2006, 9.1.22 on control of measuring devices. 2.9. Survey procedures Bunker surveyors shall use the relevant documentation as specified in 2.4.1 for the survey. 2.9.1. Time log Bunker surveyors shall record the time of all relevant events related to the entire bunkering operation until their return to base. The times shall be neatly recorded in the survey time-log as set out in Annex S. Abnormal events shall be stated in a statement of fact as set out in Annex T, a copy of which shall be submitted to the implementing authority. 2.9.2. Pre-delivery procedure 2.9.2.1. Pre-delivery conference Prior to the commencement of the bunker delivery, a pre-delivery conference shall be conducted between the bunker surveyor and representatives of the bunker tanker and vessel. Such conference shall include safety, health and environmental checks, review of the predelivery safety checklist and establishing communication links. 2.9.2.2. Checks on receiving vessel 2.9.2.2.1. Pre-survey acknowledgement The bunker surveyor should arrive on board the receiving vessel in good time so as to complete the opening checks on board the receiving vessel. On boarding the vessel, the bunker surveyor shall identify himself by producing a valid bunker surveyor license for examination by the vessel representative, and request the chief engineer to sign the pre-survey vessel acknowledgement form as set out in Annex U. 2.9.2.2.2. Draught, trim and list The bunker surveyor shall record the draught, trim and list of the vessel in the gauging ticket (Annex W). The draught, trim and list of the vessel should remain the same throughout when measuring the tank. Where any of this cannot be achieved, it shall be recorded I the gauging ticket (Annex W) and the ship s measurement report (Annex V). The draught of the vessel should be obtained from the draught marks. For any reasons of inability to do so, the bunker surveyor shall record it in the ship s measurement report (Annex V). if draught marks cannot be obtained, the bunker surveyor may use the draught gauge with caution. Care should be taken to ensure that the draught gauge is functional. Where draught gauge readings are used, this should be recorded in the ship s measurement report (Annex V). When determining the vessel s list with the clinometer, care should be taken to ensure that the clinometer is fully functional and accurate. 2.9.2.2.3. Vessel s information The bunker surveyor should confirm with the chief engineer the following information: a. Requested type, grade and quantity of bunkers. b. Nominated bunkering tanks CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 20 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER TWO PROCEDURES FOR BUNKER SURVEYING c. Requested pumping rates and d. Bunkering sequence. 2.9.2.2.4. Witnessing of bunker tanker by chief engineer The bunker surveyor shall confirm with the chief engineer whether he will witness bunker tanker gauging, meter reading and/or sampling. If the chief engineer declines to witness, the bunker surveyor shall indicate this in the pre-survey vessel acknowledgement form (ANNEX U). 2.9.2.2.5. Vessel s calibration tables The bunker surveyor, before taking opening gauges, shall inspect the vessel s bunker tank calibration table so as to record in the gauging ticket (ANNEX W) the names of all tanks and their respective reference heights (if available). During gauging of tanks, any difference from the observed reference heights shall be recorded in the gauging ticket (Annex W) and the ship s measurement report (Annex V). 2.9.2.2.6. On board quantity measurement The bunker surveyor shall together with the chief engineer gauge the vessel s bunker tanks. This shall include: a. All nominated and non-nominated tanks b. Settling tanks c. Service tanks d. Day tanks and e. Overflow tanks 2.9.2.2.7. Gauging Criteria At least three consecutive gauges shall be taken for each tank. If all three readings are within a range of 3 mm, the final gauge is obtained by averaging all the three readings. If the first two readings are identical, the the reading may be recorded without taking additional gauges. If the readings vary by more than 3 mm, additional gauges shall be taken as required and the average of all the readings taken as the final gauge. All measured readings shall be recorded in the gauging ticket (Annex W). The average reading that is agreed upon shall be recorded and marked with a circle. Large differences in the measured readings shall be noted as they may indicate the presence of non-standard sounding pipes, improper gauging or oil movements. Where the bunker surveyor has any doubts whatsoever, a re-gauging on any or all nominated tanks or non-nominated tanks shall be carried out after all tanks have been gauged to confirm the earlier measurements. 2.9.2.2.8. Free water check In every bunker tank, free water checks shall be taken by using water-indicating paste. Any free water detected shall be recorded and highlighted to the Chief Engineer and in the survey report as excessive water may render the fuel unsafe for the vessel s use. The free water detected shall be deducted for the gross standard volume calculations. In the event of traces of water found in the oil on water-cut exercise conducted by the bunker surveyor, the result thereof shall be recorded. 2.9.2.2.9. Temperature Check The bunker surveyor shall determine the temperatures of the bunker in the nominated and non-nominated tanks by using a calibrated thermometer. If the bunker surveyor is unable to CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 21 of 28

UNITED SEAS MARINE SERVICES LLC Issue Date: 01 JUNE 2016 Rev. No. Rev. Date CHAPTER TWO PROCEDURES FOR BUNKER SURVEYING measure the tank temperature due to any reasons, or where remote temperature instrument is used, he shall clearly record it in the ship s measurement report (Annex V). On completion of all opening measurements, the gauging tickets (Annex W), which are in duplicates, shall be signed bu the bunker surveyor and the Chief Engineer. A copy shall be given to the Chief Engineer immediately as contemporaneous record of the measurements carried out. 2.9.2.3. Checks on bunker tanker 2.9.2.3.1. Pre-survey Acknowledgement On boarding the bunker tanker, the bunker surveyor shall identify himself by producing a valid surveyor license for examination by the bunker tanker representative. 2.9.2.3.2. Draught, Trim and List The bunker surveyor shall record the draught, trim and list of the bunker tanker in the surveyor s bunker tanker measurement report as set out in Annex X. The draught, trim and list of the bunker tanker should remain the same throughout when measuring the tank. Where any of these cannot be achieved, it shall be recorded in the surveyor s bunker tanker measurement report (Annex X). The draught of the bunker tanker should be obtained from the draught marks. For any reasons of inability to do so, the bunker surveyor shall record it in the surveyor s bunker tanker measurement report (Annex X). If draught marks cannot be obtained, the bunker surveyor may use the draught gauge with caution. When determining the bunker tanker s list with the clinometer, care should be taken to ensure that the clinometer is fully functional and accurate. 2.9.2.3.3. Bunker Requisition Form The bunker surveyor should obtain from the cargo officer a copy of bunker requisition form (Annex D). The bunker surveyor shall note the following information: a.) Nominated bunker quantity; b.) Grade(s) of bunker (MFO, MDO, or MGO) c.) Rated pumping capacity of the bunker tanker; and d.) Basic specification of bunker such as viscosity, density at 15 degree celsius, flash point and water content of the bunker to be supplied. 2.9.2.3.4. Bunker tanker calibration tables The bunker surveyor shall inspect the bunker tanker calibration tables before taking opening gauges. The location of cargo tanks, sounding pipe positions and reference heights shall be recorded. During gauging of tanks, any differences from the observed reference heights shall be recorded in the inspection report. The bunker surveyor shall inspect the bunker tanker s tank calibration table before taking opening gauges and record down the name of all the tanks and their respective reference heights (if available) i the gauging ticket (Annex W). 2.9.2.3.5. On board quantity measurement The bunker surveyor shall together with the cargo officer and the Chief Engineer gauge the bunker tanker s cargo and non-cargo tanks. The tank gauging, temperatures, density and GOV shall be recorded in the surveyor s bunker tanker measurement report (Annex X). Gauging ticker (Annex W) shall be used and issued immediately for recording the tank s oil level, temperatures, free water, draughts and any event or observation that could be relevant to the survey. CODE OF PRACTICE FOR BUNKERING (SS600:2008) Page 22 of 28