for the Classification of Mobile Offshore Units

Transcription

1 Rules and Regulations for the Classification of Mobile Offshore Units Part 1 Regulations June 2013

2 A guide to the Rules and published requirements Rules and Regulations for the Classification of Mobile Offshore Units Introduction The Rules are published as a complete set, individual Parts are, however, available on request. A comprehensive List of Contents is placed at the beginning of each Part. Numbering and Cross-References A decimal notation system has been adopted throughout. Five sets of digits cover the divisions, i.e. Part, Chapter, Section, sub-section and paragraph. The textual cross-referencing within the text is as follows, although the right hand digits may be added or omitted depending on the degree of precision required: (a) In same Chapter, e.g. see (i.e. down to paragraph). (b) In same Part but different Chapter, e.g. see Ch 3,2.1 (i.e. down to sub-section). (c) In another Part, e.g. see Pt 5, Ch 1,3 (i.e. down to Section). The cross-referencing for Figures and Tables is as follows: (a) In same Chapter, e.g. as shown in Fig (i.e. Chapter, Section and Figure Number). (b) In same Part but different Chapter, e.g. as shown in Fig in Chapter 2. (c) In another Part, e.g. see Table in Pt 3, Ch 2. Rules updating The Rules are generally published annually and changed through a system of Notices. Subscribers are forwarded copies of such Notices when the Rules change. Current changes to Rules that appeared in Notices are shown with a black rule alongside the amended paragraph on the left hand side. A solid black rule indicates amendments and a dotted black rule indicates corrigenda. Rules programs LR has developed a suite of Calculation Software that evaluates Requirements for Ship Rules, Special Service Craft Rules and Naval Ship Rules. For details of this software please contact LR. June 2013 Lloyd s Register is a trading name of Lloyd s Register Group Limited and its subsidiaries. For further details please see Lloyd's Register Group Limited, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as Lloyd's Register. Lloyd's Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Lloyd's Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract.

3 CLASSIFICATION OF MOBILE OFFSHORE UNITS Rules and Regulations June 2013 UPDATE NOTES 1. The July 2003 version of these Rules and Regulations incorporates those changes contained in the Notices to the September 1996 version. 2. Changes approved by the Board. 3. Editorial amendments have also been incorporated. 4. The June 2013 version of these Rules and Regulations supersedes the July 2003 version. CLASSIFICATION The following explanatory note is offered to assist those concerned in the application of these Rules and Regulations. Explanatory Note Unit classification may be regarded as the development and worldwide implementation of published Rules and Regulations which, in conjunction with proper care and conduct on the part of the Owner and operator, will provide for: 1. the structural strength of (and where necessary the watertight integrity of) all essential parts of the hull and its appendages; 2. the safety and reliability of the propulsion and steering systems; and 3. the effectiveness of those other features and auxiliary systems which have been built into the unit in order to establish and maintain basic conditions on board whereby appropriate cargoes and personnel can be safely carried whilst the unit is at sea, at anchor, or moored in harbour. Lloyd's Register Group Limited (LR) maintains these provisions by way of the periodical visits by its Surveyors to the unit as defined in the Regulations in order to ascertain that the vessel currently complies with those Rules and Regulations. Should significant defects become apparent or damages be sustained between the relevant visits by the Surveyors, the Owner and operator are required to inform LR without delay. Similarly any modification which would affect Class must receive prior approval by LR. A unit is said to be in Class when the Rules and Regulations which pertain to it have, in the opinion of LR, been complied with, or when special dispensation from compliance has been granted by LR. It should be appreciated that, in general, classification Rules and Regulations do not cover such matters as the unit's floatational stability, life-saving appliances, pollution prevention arrangements, and structural fire protection, detection and extinction arrangements where these are covered by the International Convention for the Safety of Life at Sea, 1974, its Protocol of 1978, and the amendments thereto, nor do they protect personnel on board from dangers connected with their own actions or movement around the unit. This is because the handling of these aspects is the prerogative of the National Authority with which the unit is registered. A great many of these authorities, however, delegate such responsibilities to the Classification Societies who then undertake them in accordance with agreed procedures.

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5 Chapter Contents Part 1 PART 1 REGULATIONS Chapter 1 General Regulations 2 Classification Regulations 3 Periodical Survey Regulations 4 Verification in Accordance with National Regulations for Offshore Installations PART 2 RULES FOR THE MANUFACTURE, TESTING AND CERTIFICATION OF MATERIALS PART 3 FUNCTIONAL UNIT TYPES AND SPECIAL FEATURES PART 4 STEEL UNIT STRUCTURES PART 5 MAIN AND AUXILIARY MACHINERY PART 6 CONTROL AND ELECTRICAL ENGINEERING PART 7 SAFETY SYSTEMS, HAZARDOUS AREAS AND FIRE PART 8 CORROSION CONTROL Lloyd's Register Group Limited All rights reserved. Except as permitted under current legislation no part of this work may be photocopied, stored in a retrieval system, published, performed in public, adapted, broadcast, transmitted, recorded or reproduced in any form or by any means, without the prior permission of the copyright owner. Enquiries should be addressed to Lloyd's Register Group Limited, 71 Fenchurch Street, London, EC3M 4BS. LLOYD S REGISTER 1

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7 Contents Part 1 CHAPTER 1 GENERAL REGULATIONS Sections 1 to 8 CHAPTER 2 CLASSIFICATION REGULATIONS Section 1 Conditions for classification 1.1 General 1.2 Interpretation of the Rules 1.3 Advisory services 1.4 Legislative verification Section 2 Definitions, character of classification and class notations 2.1 General definitions 2.2 Modes of operation 2.3 Character symbols 2.4 Class notations (hull/structure) 2.5 Class notations (machinery) 2.6 Class notations (environmental protection) 2.7 Descriptive notes Section 3 Surveys General 3.1 Statutory surveys 3.2 New construction surveys 3.3 Existing installations 3.4 Damages, repairs and alterations 3.5 Existing installations Periodical Surveys 3.6 Certificates 3.7 Notice of surveys 3.8 Temporary suspension of class 3.9 Withdrawal/suspension of class 3.10 Appeal against Surveyor s recommendations 3.11 Ownership details Section 4 IACS and EMSA audits and assessments 4.1 Audit of surveys CHAPTER 3 PERIODICAL SURVEY REGULATIONS Section 1 General 1.1 Frequency of surveys 1.2 Surveys for damage or alterations 1.3 Unscheduled surveys 1.4 Surveys for the issue of Convention Certificates 1.5 Definitions 1.6 Planned survey programme 1.7 Preparation for survey and means of access 1.8 Thickness measurement at survey 1.9 Repairs Section 2 Annual Surveys Hull and machinery requirements 2.1 General 2.2 Structure and equipment 2.3 Machinery 2.4 Safety and communication systems and hazardous areas 2.5 Production and oil storage installations 2.6 Inert gas systems 2.7 Drilling units LLOYD S REGISTER 3

8 Contents Part 1 Section 3 Intermediate Surveys Hull and machinery requirements 3.1 General 3.2 Intermediate Surveys Section 4 Docking Surveys and In-water Surveys Hull and machinery requirements 4.1 General 4.2 Docking Surveys 4.3 In-water Surveys Section 5 Special Survey Hull requirements 5.1 General 5.2 Preparation 5.3 Examination and testing 5.4 Thickness measurement 5.5 Positional mooring systems Section 6 Machinery Surveys General requirements 6.1 Annual, Intermediate, Docking and In-water Surveys 6.2 Complete Surveys Section 7 Turbines Detailed requirements 7.1 Complete Surveys Section 8 Oil engines Detailed requirements 8.1 Complete Surveys Section 9 Electrical equipment 9.1 Annual and Intermediate Surveys 9.2 Complete Surveys 9.3 Docking Surveys and In-water Surveys Section 10 Boilers 10.1 Frequency of surveys 10.2 Scope of surveys Section 11 Steam pipes 11.1 Frequency of surveys 11.2 Scope of surveys Section 12 Screwshafts, tube shafts and propellers 12.1 Frequency of surveys 12.2 Normal surveys 12.3 Complete surveys 12.4 Screwshaft Condition Monitoring (SCM) 12.5 Modified Survey 12.6 Special cases Section 13 Drilling plant facility 13.1 Frequency of surveys 13.2 Scope of surveys Section 14 Process plant facility 14.1 Frequency of surveys 14.2 Scope of surveys Section 15 Riser systems 15.1 Surveys General Section 16 Safety and communication systems and hazardous areas 16.1 Frequency of surveys 16.2 Scope of surveys 4 LLOYD S REGISTER

9 Contents Part 1 Section 17 Pressure vessels for process and drilling plant 17.1 Frequency of surveys 17.2 Scope of surveys Section 18 Inert gas systems 18.1 Frequency of surveys 18.2 Scope of surveys Section 19 Classification of units not built under survey 19.1 General 19.2 Hull and equipment 19.3 Machinery Section 20 Laid-up machinery 20.1 Survey requirements CHAPTER 4 VERIFICATION IN ACCORDANCE WITH NATIONAL REGULATIONS FOR OFFSHORE INSTALLATIONS Section 1 Conditions for verification 1.1 General requirements 1.2 Existing units 1.3 Recognised Codes and Standards Section 2 Documentation 2.1 Certificates Section 3 Descriptive note 3.1 General Section 4 Survey requirements 4.1 General LLOYD S REGISTER 5

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11 General Regulations Part 1, Chapter 1 Sections 1 & 2 Section Lloyd s Register Group Limited is a registered company under English law, with origins dating from It was established for the purpose of producing a faithful and accurate classification of merchant shipping. It now primarily produces classification Rules. 1.2 Classification services are delivered to clients by a number of other members subsidiaries and affiliates of Lloyd s Register Group Limited, including but not limited to: Lloyd s Register EMEA, Lloyd s Register Asia, Lloyd s Register North America, Inc., and Lloyd s Register Central and South America Limited. Lloyd s Register Group Limited, its subsidiaries and affiliates are hereinafter, individually and collectively, referred to as LR. Section Lloyd s Register Group Limited is managed by a Board of Directors (hereinafter referred to as the Board ). The Board has: appointed a Classification Committee and determined its powers and functions and authorised it to delegate certain of its powers to a Classification Executive and Devolved Classification Executives; appointed Technical Committees and determined their powers, functions and duties. 2.2 LR has established National and Area Committees in the following: Countries: Areas: Australia (via Lloyd s Register Asia) Benelux (via Lloyd s Register EMEA) Canada (via Lloyd s Register North America, Inc.) Central America (via Lloyd s Register Central and China (via Lloyd s Register Asia) South America Ltd) Egypt (via Lloyd s Register EMEA) Nordic Countries (via Lloyd s Register EMEA) Federal Republic of Germany South Asia (via Lloyd s Register Asia) (via Lloyd s Register EMEA) Asian Shipowners (via Lloyd s Register Asia) France (via Lloyd s Register EMEA) Greece (via Lloyd s Register EMEA) Italy (via Lloyd s Register EMEA) Japan (via Lloyd s Register Group Limited) New Zealand (via Lloyd s Register Asia) Poland (via Lloyd s Register (Polska) Sp zoo) Spain (via Lloyd s Register EMEA) United States of America (via Lloyd s Register North America, Inc.) LLOYD S REGISTER 1

12 General Regulations Part 1, Chapter 1 Section 3 Section LR s Technical Committee is at present composed of a maximum of 80 members which includes: Ex officio members: Chairman and Chief Executive Officer of Lloyd s Register Group Limited... Chairman of the Classification Committee of Lloyd s Register Group Limited... Members Nominated by: Technical Committee Royal Institution of Naval Architects Institution of Engineers and Shipbuilders in Scotland Institute of Marine, Engineering, Science and Technology Institute of Materials, Minerals and Mining... 1 Honourable Company of Master Mariners... 2 Institution of Engineering and Technology... 1 Institute of Refrigeration... 1 Welding Institute... 1 Shipbuilders and Shiprepairers Association The Society of Consulting Marine Engineers and Ship Surveyors Community of European Shipyards Associations... 1 Society of Maritime Industries European Marine Equipment Council... 1 Chamber of Shipping... 1 Greek Shipping Co-operation Committee International Association of Oil and Gas Producers In addition to the foregoing: (a) Each National or Area Committee may appoint a representative to attend meetings of the Technical Committee. (b) A maximum of five representatives from National Administrations may be co-opted to serve on the Technical Committee. Representatives from National Administrations may also be elected as members of the Technical Committee under one of the categories identified in 3.1. (c) Further persons may be co-opted to serve on the Technical Committee by the Technical Committee. 3.3 All elections are subject to confirmation by the Board. 3.4 The function of the Technical Committee is to consider: (a) any technical issues connected with LR s marine business; (b) any proposed alterations in the existing Rules; (c) any new Rules for classification; Where changes to the Rules are necessitated by mandatory implementation of International Conventions, Codes or Unified Requirements adopted by the International Association of Classification Societies these may be implemented by LR without consideration by the Technical Committee. 3.5 The term of office of the Chairman and of all members of the Technical Committee is five years. Members may be reelected to serve an additional term of office with the approval of the Board. The term of office of the Chairman may be extended with the approval of the Board. 3.6 In the case of continuous non-attendance of a member, the Technical Committee may withdraw membership. 3.7 Meetings of the Technical Committee are convened as often and at such times and places as is necessary, but there is to be at least one meeting in each year. Urgent matters may be considered by the Technical Committee by correspondence. 3.8 Any proposal involving any alteration in, or addition to, Part 1, Chapter 1 of Rules for Classification is subject to approval of the Board. All other proposals for additions to or alterations to the Rules for Classification other than Part 1, Chapter 1, will following consideration and approval by the Technical Committee either at a meeting of the Technical Committee or by correspondence, be recommended to the Board for adoption. 3.9 The Technical Committee is empowered to: (a) appoint sub-committees or panels; and (b) co-opt to the Technical Committee, or to its sub-committees or panels, representatives of any organisation or industry or private individuals for the purpose of considering any particular problem. 2 LLOYD S REGISTER

13 General Regulations Part 1, Chapter 1 Sections 4 & 5 Section LR s Naval Ship Technical Committee is at present composed of a maximum of 50 members and includes: Ex officio members Chairman and Chief Executive Officer of Lloyd s Register Group Limited Member nominated by: Naval Ship Technical Committee; The Royal Navy and the UK Ministry of Defence; UK Shipbuilders, Ship Repairers and Defence Industry; Overseas Navies, Governments and Governmental Agencies; Overseas Shipbuilders, Ship Repairers and Defence Industries; 4.2 All elections are subject to confirmation by the Board. 4.3 All members of the Naval Ship Technical Committee are to hold security clearance from their National Authority for the equivalent of NATO CONFIDENTIAL. All material is to be handled in accordance with NATO Regulations or, for non-nato countries, an approved equivalent. No classified material shall be disclosed to any third party without the consent of the originator. 4.4 The term of office of the Naval Ship Technical Committee Chairman and of all members of the Naval Ship Technical Committee Chairman is five years. Members may be re-elected to serve an additional term of office with the approval of the Board. The term of the Chairman may be extended with the approval of the Board. 4.5 In the case of continuous non-attendance of a member, the Naval Ship Technical Committee may withdraw membership. 4.6 The function of the Naval Ship Technical Committee is to consider technical issues connected with Naval Ship matters and to approve proposals for new Naval Ship Rules, or amendments to existing Naval Ship Rules. 4.7 Meetings of the Naval Ship Technical Committee are convened as necessary but there will be at least one meeting per year. Urgent matters may be considered by the Naval Ship Technical Committee by correspondence. 4.8 Any proposal involving any alteration in, or addition to, Part 1, Chapter 1 of Rules for Classification of Naval Ships is subject to approval of the Board. All other proposals for additions to or alterations to the Rules for Classification of Naval Ships, other than Part 1, Chapter 1, will following consideration and approval by the Naval Ship Technical Committee, either at a meeting of the Naval Ship Technical Committee or by correspondence, be recommended to the Board for adoption. 4.9 The Naval Ship Technical Committee is empowered to: (a) appoint sub-committees or panels; and (b) co-opt to the Naval Ship Technical Committee, or to its sub-committees or panels, representatives of any organisation or industry or private individuals for the purpose of considering any particular problem. Section LR has the power to adopt, and publish as deemed necessary, Rules relating to classification and has (in relation thereto) provided the following: (a) Except in the case of a special directive by the Board, no new Regulation or alteration to any existing Regulation relating to classification or to class notations is to be applied to existing ships. (b) Except in the case of a special directive by the Board, or where changes necessitated by mandatory implementation of International Conventions, Codes or Unified Requirements adopted by the International Association of Classification Societies are concerned, no new Rule or alteration in any existing Rule is to be applied compulsorily after the date on which the contract between the ship builder and shipowner for construction of the ship has been signed, nor within six months of its adoption. The date of contract for construction of a ship is the date on which the contract to build the ship is signed between the prospective shipowner and the ship builder. This date and the construction number (i.e. hull numbers) of all the vessels included in the contract are to be declared by the party applying for the assignment of class to a newbuilding. The date of contract for construction of a series of sister ships, including specified optional ships for which the option is ultimately exercised, is the date on which the contract to build the series is signed between the prospective shipowner and the ship builder. In this section a series of sister ships is a series of ships built to the same approved plans for classification purposes, under a single contract for construction. The optional ships will be considered part of the same series of sister ships if the option is exercised not later than 1 year after the contract to build the series was signed. If a contract for construction is later amended to include additional ships or additional options, the date of contract for construction for such ships is the LLOYD S REGISTER 3

14 General Regulations Part 1, Chapter 1 Sections 5 to 8 (c) (d) (e) (f) (g) date on which the amendment to the contract is signed between the prospective shipowner and the ship builder. The amendment to the contract is to be considered as a new contract. If a contract for construction is amended to change the ship type, the date of contract for construction of this modified vessel, or vessels, is the date on which the revised contract or new contract is signed between the Owner, or Owners, and the shipbuilder. Where it is desired to use existing approved ship or machinery plans for a new contract, written application is to be made to LR. Sister ships may have minor design alterations provided that such alterations do not affect matters related to classification, or if the alterations are subject to classification requirements, these alterations are to comply with the classification requirements in effect on the date on which the alterations are contracted between the prospective owner and the ship builder or, in the absence of the alteration contract, comply with the classification requirements in effect on the date on which the alterations are submitted to LR for approval. All reports of survey are to be made by surveyors authorised by members of the LR Group to survey and report (hereinafter referred to as the Surveyors ) according to the form prescribed, and submitted for the consideration of the Classification Committee. Information contained in the reports of classification and statutory surveys will be made available to the relevant owner, National Administration, Port State Administration, P&I Club, hull underwriter and, if authorised in writing by that owner, to any other person or organisation. Notwithstanding the general duty of confidentiality owed by LR to its client in accordance with the LR Rules, LR clients hereby accept that, LR will participate in the IACS Early Warning System which requires each IACS member to provide its fellow IACS members and Associates with relevant technical information on serious hull structural and engineering systems failures, as defined in the IACS Early Warning System (but not including any drawings relating to the ship which may be the specific property of another party), to enable such useful information to be shared and utilised to facilitate the proper working of the IACS Early Warning System LR will provide its client with written details of such information upon sending the same to IACS Members and Associates. Information relating to the status of classification and statutory surveys and suspensions/withdrawals of class together with any associated conditions of class will be made available as required by applicable legislation or court order. A Classification Executive consisting of senior members of LR s Classification Department staff shall carry out whatever duties that may be within the function of the Classification Committee that the Classification Committee assigns to it. Section No LR Group employee is permitted under any circumstances, to accept, directly or indirectly, from any person, firm or company, with whom the work of the employee brings the employee into contact, any present, bonus, entertainment or honorarium of any sort whatsoever which is of more than nominal value or which might be construed to exceed customary courtesy extended in accordance with accepted ethical business standards. Section LR has the power to withhold or, if already granted, to suspend or withdraw any ship from class (or to withhold any certificate or report in any other case), in the event of non-payment of any fee to any member of the LR Group. Section When providing services LR does not assess compliance with any standard other than the applicable LR Rules, international conventions and other standards agreed in writing. 8.2 In providing services, information or advice, LR does not warrant the accuracy of any information or advice supplied. Except as set out herein, LR will not be liable for any loss, damage or expense sustained by any person and caused by any act, omission, error, negligence or strict liability of LR or caused by any inaccuracy in any information or advice given in any way by or on behalf of LR even if held to amount to a breach of warranty. Nevertheless, if the Client uses LR services or relies on any information or advice given by or on behalf of LR and as a result suffers loss, damage or expense that is proved to have been caused by any negligent act, omission or error of LR or any negligent inaccuracy in information or advice given by or on behalf of LR then LR will pay compensation to the client for its proved loss up to but not exceeding the amount of the fee (if any) charged for that particular service, information or advice. 4 LLOYD S REGISTER

15 General Regulations Part 1, Chapter 1 Section LR will print on all certificates and reports the following notice: Lloyd's Register Group Limited, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as Lloyd's Register. Lloyd's Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Lloyd's Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract. 8.4 Except in the circumstances of section 8.2 above, LR will not be liable for any loss of profit, loss of contract, loss of use or any indirect or consequential loss, damage or expense sustained by any person caused by any act, omission or error or caused by any inaccuracy in any information or advice given in any way by or on behalf of LR even if held to amount to a breach of warranty. 8.5 Any dispute about LR services is subject to the exclusive jurisdiction of the English courts and will be governed by English law. LLOYD S REGISTER 5

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17 Classification Regulations Part 1, Chapter 2 Section 1 Section 1 Conditions for classification 2 Definitions, character of classification and class notations 3 Surveys General 4 IACS and EMSA audits and assessments Section 1 Conditions for classification 1.1 General Units referred to in this Chapter are defined in Section 2 and Part 3. Machinery referred to in this Chapter is defined in Parts 5 and 6. Safety systems, hazardous areas and fire safety referred to in this Chapter are defined in Part 7. Drilling and process plant referred to in this Chapter are defined in Pt 3, Ch 7 and Ch 8. Materials referred to in this Chapter are defined in the Rules for the Manufacture, Testing and Certification of Materials (hereinafter referred to as the Rules for Materials) Mobile offshore units built in accordance with LR s Rules and Regulations, or in accordance with requirements equivalent thereto, will be assigned a class on the ClassDirect Live website and will continue to be classed so long as they are found, upon examination at the prescribed surveys, to be maintained in accordance with the requirements of the Rules. Classification will be conditional upon compliance with LR s requirements for materials, structure, machinery, equipment and other safety considerations Units designed and constructed to standards other than the Rule requirements will be considered for classification, subject to the alternative standards being considered by LR to give an equivalent level of safety to the Rule requirements. It is essential that in such cases LR is informed of the Owner s proposals at an early stage, in order that a basis for acceptance of the standards may be agreed The Classification Committee, in addition to requiring compliance with LR s Rules, or other agreed performance standards, may require to be satisfied that units are suitable for geographical or other limits or conditions of the service contemplated Although the specified design environmental criteria on which classification is based are the responsibility of the Builders/designers, assessment by LR of a unit s suitability for service in a particular sea area will be undertaken and agreed before approval Loading conditions and other preparations required to permit a unit (whether self-propelled or not) with a notation specifying some service limitation to undertake a sea-going voyage, either from port of building to service area or from one service area to another, are to be in accordance with arrangements agreed by LR prior to the voyage Any damage, defect, breakdown or grounding, serious deficiency, detention or arrest, or refusal of access which could invalidate the conditions for which class has been assigned is to be reported to LR without delay The Owner is solely responsible for the operation of the unit. The Rules are framed on the understanding that the unit will be properly loaded and operated, and the environmental conditions are no more severe than those agreed for the design basis and approval, without prior agreement of LR When longitudinal strength calculations are required for surface type units, loading guidance information is to be supplied to the Master by means of a Loading Manual and in addition, when required, by means of a loading instrument, see also Loading Manuals and loading instruments for surface type units are to be in accordance with Pt 3, Ch 4,8 of LR s Rules and Regulations for the Classification of Ships (hereinafter referred to as the Rules for Ships) It will be the responsibility of the Owner to provide instructions and set down limits for the operation of the unit to ensure that the loading and environmental conditions on which classification is based will not be exceeded. These instructions and limitations are to be contained in the Operations Manual (or a Loading Manual for surface type units) which is to be retained on board the unit. The Owner should ensure that the Manual is kept up to date and contains appropriate data required by the relevant National Administration The adequacy of sea bed conditions with respect to bearing capacity, resistance to possible sliding and anchor holding capacity is not covered by classification. In particular, for self-elevating units, it is the responsibility of the Owner to be satisfied that the sea bed conditions are suitable to allow the legs to be safely and adequately preloaded For units, the arrangements and equipment of which are required to comply with the requirements of the: IMO Code for the Construction and Equipment of Mobile Offshore Drilling Units, 2009 (2009 MODU Code); Load Lines Convention; International Convention for the Safety of Life at Sea, 1974 and its Protocol of 1978; International Convention for the Prevention of Pollution from Ships, 1973, as modified by the Protocol of 1978 relating thereto; LLOYD S REGISTER 1

18 Classification Regulations Part 1, Chapter 2 Section 1 International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code); and applicable Amendments thereto. The Classification Committee requires the applicable Convention Certificates to be issued by a National Administration, or by LR, or by an IACS Member when so authorised. Safety Management Certificates in accordance with the provisions of the International Safety Management Code (ISM Code) may be issued by an organisation complying with IMO Resolution A.739(18) and authorised by the National Administration with which the unit is registered. Cargo Ship Radio Certificates may be issued by an organisation authorised by the National Administration with which the unit is registered. In the case of dual classed units, Convention Certificates may be issued by the other Society with which the unit is classed, provided that this is recognised in a formal Dual Class Agreement with LR and provided that the other Society is also authorised by the National Administration. In the event of a National Administration withdrawing any unit s Convention Certificate (referred to in this Section), then the Classification Committee may suspend the unit s class. If a unit is removed from the National Administration s Registry for non-compliance with the Conventions or Classification requirements referred to herein then the Classification Committee will suspend the unit s class. In the event of ISM Code certification being withdrawn from a unit or Operator, the Classification Committee will suspend the unit s class It is the Owner s responsibility to comply with any applicable regulations of the Coastal State Authorities in the areas of operation. Compliance with the prescribed standards of the applicable National Administration is to be demonstrated by the issue of appropriate certification by the National Administration or LR where so authorised. See also Where the National Administration has no prescribed standards for mobile offshore units which are outside the scope of application of the 2009 MODU Code and/or the International Conventions referred to in or their standards are not considered acceptable for classification purposes, LR will apply the relevant parts of the 2009 MODU Code/Convention Regulations and other recognised Standards as applicable to the intended use of the unit as a prerequisite to classification Where an onboard computer system having longitudinal strength computation capability, which is required by the Rules, is provided on a new unit or newly installed on an existing unit, then the system is to be certified in respect of longitudinal strength in accordance with LR s Approval of Longitudinal Strength and Stability Calculation Programs Where an onboard computer system having stability computation capability is provided on a new unit, the system is to be certified in respect of stability aspects, in accordance with LR s Approval of Longitudinal Strength and Stability Calculation Programs. When provided, an onboard computer system having stability computation capability is to carry out the calculations and checks necessary to assess compliance with all the stability requirements applicable to the unit on which it is installed When accommodation and other support units are intended to operate for prolonged periods adjacent to other offshore installations which are being used for hydrocarbon exploration or production, it is the Owner s responsibility to comply with the requirements of the appropriate National Administration and LR is to be advised at the approval stage so that classification aspects relating to safety are taken into account, see Part 7. Special consideration will be given to existing units with regard to class Floating production and oil storage units which operate permanently at a fixed geographic location (including disconnectable units) will have class assigned in accordance with LR s Rules and Regulations for the Classification of a Floating Offshore Installation at a Fixed Location. See also Pt 3, Ch 1,1.1.3 and Ch 3, When a unit, fitted with a conventional rudder, is to operate for a prolonged period at a fixed location, it is the Owner s responsibility to ensure that suitable arrangements are provided to prevent damage to the steering gear. Special consideration will be given to the requirements for the steering gear and propelling machinery, see Pt 4, Ch 10, and Pt 5, Ch 19 and Ch Where a unit has been detained by Port State Control, the Owner is to advise LR immediately, in order to arrange the attendance of a Surveyor. 1.2 Interpretation of the Rules The interpretation of the Rules is the sole responsibility, and is at the sole discretion, of LR. Any uncertainty in the meaning of the Rules is to be referred to LR for clarification In many instances, these Rules require that particular components, systems and equipment, etc., must also comply with applicable Sections of the Rules for Ships. Every effort has been made to avoid potential conflicting requirements; however, where such a conflict becomes apparent, the requirements of these Rules shall take precedence Except in the case of a special directive by the Classification Committee, no new Rule or alteration in any existing Rule materially affecting classification is to be applied compulsorily within six months of its adoption, nor after the approval of the original midship section or equivalent original structural plans. Where it is desired to use existing previously approved plans for a new contract, written application is to be made to the Classification Committee. 1.3 Advisory services The Rules do not cover certain technical characteristics, such as stability, hull vibration, etc., but advice may be given on such matters without any assumption of responsibility for such advice. 2 LLOYD S REGISTER

19 Classification Regulations Part 1, Chapter 2 Sections 1 & Legislative verification LR has been authorised by a number of National Administrations to carry out verification of offshore units and installations in accordance with statutory Regulations. Full details will be supplied to Owners and other interested parties on request. See also 2.7 and Chapter LR has also been authorised on behalf of National Administrations of a large number of nations to issue certain statutory, safety and other certificates. LR is willing to act, when requested, in respect of such certification When machinery and equipment are to comply with EC Directives, LR as a notified body can issue EC Type Certification in accordance with LR s appointment. Full details will be supplied to manufacturers and other interested parties on request. Section 2 Definitions, character of classification and class notations 2.1 General definitions NOTE For the purpose of class notations, the definitions given in to will apply Offshore unit means a unit engaged in offshore operations including drilling, oil production, accommodation and other support functions and which generally operates within the territorial waters of a flag state, but excluding the ship types defined in Part 4 of the Rules for Ships Mobile indicates that the unit is designed to be moved from one operating site to another Coastal State Authority is the Authority responsible for the safety standards of units operating in or adjacent to their territorial waters National Authority is the Marine Authority in the country in which a unit is registered National Administrations are those Authorities defined in and Owner. In the context of these Rules, the Owner is defined as the party responsible for the unit, including its operation and safety Ship units are self-propelled surface type units of shipshaped single or multiple hull form Barge units are surface type units without primary propelling machinery Self-elevating units are mobile units which are designed to operate as sea bed-stabilised units in an elevated mode. These units have a buoyant hull with movable legs capable of raising the hull above the surface of the sea. The legs may be designed to penetrate the sea bed, or be attached to a mat or individual footings which rest on the sea bed. See also Semi-submersible or column-stabilised units have working platforms supported on widely spaced buoyant columns. The columns are normally attached to buoyant lower hulls or pontoons. These units are normally floating types but can be designed to rest on the sea bed, see also Support units are units whose primary function is to support offshore installations. They are normally engaged in one or more of the following functions: crane operations, fire-fighting, diving operations, maintenance, construction, pipelaying and accommodation Accommodation unit is a support unit whose primary function is to provide accommodation for more than twelve offshore personnel who are not crew members or passengers Support vessel. Alternative name for a support unit as defined in Positional mooring. Station-keeping by means of multi-leg mooring systems with or without thruster assistance. NOTE Other definitions for mooring facilities are contained in Pt 3, Ch Clear water. Water having sufficient depth to permit the normal development of wind generated waves Fetch. The extent of clear water across which a wind has blown before reaching the unit Sheltered water. Water where the fetch is six nautical miles or less Reasonable weather. Wind strengths of force six or less in the Beaufort scale, associated with sea states sufficiently moderate to ensure that green water is taken on board the unit s weather deck at infrequent intervals only, or not at all Self-propelled means that the unit is designed for unassisted sea passages and is fitted with propelling machinery in accordance with LR Rules Surface type units are units with a ship or bargetype displacement hull of single or multiple hull construction intended for operation in the floating condition. LLOYD S REGISTER 3

20 Classification Regulations Part 1, Chapter 2 Section Modes of operation A mode of operation is a condition or manner in which a unit may operate or function while on location or in transit. From the classification aspect, the modes of operation of a unit should include the following: (a) Operating condition The condition when a unit is on location, for the purpose of carrying out its primary design operations, and the combined environmental and operational loadings are within the appropriate design limits established for such operations. The unit may be either afloat or supported on the sea bed, as applicable. (b) Survival condition A severe storm condition during which a unit may be subjected to the most severe environmental loadings for which the unit is designed. Drilling or similar operations may have been discontinued due to the severity of the environmental loadings. The unit may be either afloat or supported on the sea bed, as applicable. (c) Transit condition All unit movements from one geographical location to another. NOTE For surface type units, the mode of operation will be defined by the loading conditions stated in the approved loading manual Linked means connected while operating to a single point mooring facility, fixed structure or otherwise attached or resting on the sea bed Sea bed-stabilised means designed to operate under normal operating and survival conditions while the footings, mat or pontoons rest on the sea bed. 2.3 Character symbols 100 This character figure will be assigned to all units considered suitable for operating at exposed locations offshore or for sea-going service. A This character letter will be assigned to all units which have been built or accepted into class in accordance with LR s Rules and Regulations, and which are maintained in good and efficient condition. 1 This character figure will be assigned to: (a) Units having on board, in good and efficient condition, anchoring and/or mooring equipment in accordance with Pt 4, Ch 9 of the Rules. (b) Units classed for special service, having on board, in good and efficient condition, anchoring and/or mooring equipment approved by the Classification Committee as suitable and sufficient for the particular service. (c) Units equipped with a classed dynamic positioning system which has sufficient power, redundancy of components and duplication of controls to supplement or replace the anchoring equipment on board such that the combined system/equipment is approved by the Classification Committee as equivalent to the anchoring equipment necessary during voyages, transfer moves or under normal operating conditions, see Pt 3, Ch 9. T This character letter will be assigned to units which are intended to perform their primary designed service function only while they are anchored, moored or linked, and which have, in good and efficient condition, adequately attached anchoring, mooring or linking equipment which has been approved by the Classification Committee as suitable and sufficient for the intended service All units, when classed, will be assigned one or more character symbols, as applicable. For the majority of units, the character assigned will be OU 100A1 or OU 100AT. See also N This character letter will be assigned to installations on which the Classification Committee has agreed that anchoring and mooring equipment need not be fitted in view of their particular service A full list of character symbols for which offshore units may be eligible is as follows: This distinguishing mark will be assigned, at the time of classing, to new units constructed under LR s Special Survey, in compliance with the Rules, and to the satisfaction of the Classification Committee For classification purposes the character figure 1 or the character letter T is generally to be assigned, see also Non-propelled units assigned the character letter T which are required to make transit voyages from one operating site to another are to be fitted with towing arrangements in accordance with Pt 4, Ch 9. OU This distinguishing mark will be assigned, at the time of classing, to new units constructed under LR s Special Survey, in accordance with plans approved by another recognised classification society. These character letters will be assigned to all units which have been built or accepted into Class in accordance with LR s Rules and Regulations for the Classification of Mobile Offshore Units When a self-propelled unit which normally performs its primary designed service function only while anchored, moored or linked is required by the Owners to make transit voyages from one operating site to another, the unit is to be fitted with anchoring equipment in accordance with the Rules, and the character figure (1) will be assigned after the character letter T. 4 LLOYD S REGISTER

21 Classification Regulations Part 1, Chapter 2 Section In cases where the anchoring and/or mooring equipment is found to be seriously deficient in quality or quantity, the class of the unit will be liable to be withheld The character figure 100 will be omitted for units operating in protected waters such as harbours, inland lakes, etc., and the requirements of the Rules may be relaxed or otherwise amended as considered appropriate by the Classification Committee Units will not be classed unless the primary propelling machinery and/or the essential auxiliary machinery of the unit is also classed. 2.4 Class notations (hull/structure) When considered necessary by the Classification Committee, or when requested by an Owner and agreed by the Classification Committee, a class notation will be appended to the character of classification assigned to the unit. This class notation will consist of one of, or a combination of, the following: A type notation. A special features notation. A special duties notation. A service restriction notation. An operating limits notation Type notation. A notation indicating that the unit has been arranged and constructed in compliance with the particular Rules intended to apply to that type of unit, e.g., Mobile drilling unit. Typical type notations are defined in Part Special duties notation. A notation indicating that the unit has been designed, modified or arranged for special duties other than those implied by the type notation, e.g., oil exploration. Units with special duties notations are not thereby prevented from performing any other duties for which they may be suitable Special features notation. A notation indicating that the unit incorporates special features which significantly affect the design, e.g., DRILL. See Operating limits notation. A notation indicating the significant design criteria on which approval of the unit is based, e.g.: Maximum operating environmental design limits for semi-submersible units and self-elevating units. Limiting sea state and/or wind speed during which a unit may remain moored to a single point mooring Service restriction notation. A notation indicating that the unit has been classed on the understanding that it will be operated only in suitable areas or conditions which have been agreed by the Classification Committee, e.g., protected waters service Service restriction notations will generally be assigned in the form shown in and , but this does not preclude Owners requesting special consideration for other forms in unusual cases Where a service notation is applicable, certain exemptions may be granted. Where these affect statutory requirements, such as Load Lines, the Owner or Shipbuilder is to obtain the authorisation of the Flag State. Such exemptions are to be recorded on the Class certificate and any applicable statutory certificate Protected waters service. Service in sheltered water adjacent to sand banks, reefs, breakwaters or other coastal features Specified operating area service. Service within a defined geographical area which will be indicated on the ClassDirect Live website, e.g., Black Sea service A typical example of character of classification and class notations is: OU 100A1 Mobile drilling unit, DRILL, Oil exploration, Gulf of Mexico service The assigned character symbols of class and the appropriate class notations will be entered in the ClassDirect Live website. For all unit types except surface type units, the limiting structural design criteria on which classification is based will also be entered on the ClassDirect Live website The following special features class notations may be assigned as considered appropriate by the Classification Committee: PPF DRILL DROPS PRS OIWS This notation will be assigned to units which have specialised structures and an installed process plant facility which has been constructed, installed and tested under LR s Special Survey and in accordance with LR s Rules and Regulations, see Pt 3, Ch 8. This notation will be assigned to units which have specialised structures and an installed drilling plant facility which has been constructed, installed and tested under LR s Special Survey and in accordance with LR s Rules and Regulations, see Pt 3, Ch 7. This notation will be assigned to units which have preventive measures to protect personnel from the hazards of dropped objects in accordance with Pt 3, Ch 7,1. This notation will be assigned to units which have a product riser system which has been constructed, installed and tested under LR s Special Survey, in accordance with LR s Rules, see Pt 3, Ch 12. This notation for In-Water Survey may be assigned to a unit where the applicable requirements of LR s Rules and Regulations are complied with, see Pt 1, Ch 3,4.3, Pt 3, Ch 1,2.1.3 and Pt 8, Ch 1, The application of the OIWS notation to existing units will be subject to special consideration by the Classification Committee. LLOYD S REGISTER 5