)

. RULES FOR .. CLASSIFICATION OF

MOBILE OFFSHORE UNITS

REGULATIONS

PART 1 CHAPTER 1

GENERAL REGULATIONS· JULY1999

SECTIONS PAGE

1 Classification Principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 Scope of Rules and Class Notations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Classification Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 Legal Provisions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

DET NORSKE VERITAS Veritasveien I, N'1322 H0Vilc, Norway Tel.: +47 67 57 99 00 Fai<: +47 67 57 99 11

CJIANG-ES IN TllK RULES

General The present edition of the Rules includes amendments and additions decided by the Board in June 1999 and supersedes theJanu'\'Y 1999. edition of thel sariie chapter. The rule changes·colne iD.to. force on. 1 January 2000.

This chapter is valid until superseded by a revise<l chapter. Sup­plements will not be issued except for an updated liSt of corrections presented in Pt.O Ch.I Sec.3. Pt.O Ch.! is normally revised in January and July esch yesr.

Re~i~i::d··chapters'willbe forwarded to all subscribers to the Rules. Buyers of reprints are advised to check the updated list of Rule chapters printed in Pt.O Ch.1 Sec.I to ensure that the chapter is current.

Main changes

• Sec.I Classification Principles

- In the Rules for the Classification of Ships, a Table Bl was in­cluded in the January 1996 issue, based on !ACS Procedural Requirement No. 3, 1996 Rev.I. It specifies that the yard shall automatically receive approved "as carried out" draw,ings :for "Newbuildings". This is formally correct, but only for yard­related drawings (e.g. structure and system drawings). Fabri­cation drawings for components (e.g. boilers or engines), however, are the property of the component manufacturer. Ac-

Comments to the Rules may be sent by <>-mail to dJp203@dnv.com. ·

cordingly "as carried out" drawings for these·' (°compci·~etiis) should not be distributed to the yard or other third .party ynthoul the knowledge and acceptance of the manufacturer .:(or _the·,~old~_ of the copyright). In order to avoid future mislltld.er_stai)w.rlgs Table Bl and the revised wording from the Rulea for Clas~b fication of Ships is included in B600 of the R~l"'!•for ~l.ssi, fication of MOU, also. :.·.-· :-..: .. , ': ._ ... -,.: --: ·/

- To limit potential problems related to the Y2K issue, 3ii 8.ddf­tional disclaimer has been included in item B702.

• Sec.3 Classification Procedure

- IACS has issued new procedural requirements for service sup­pliers in Unified Requirement Z17. To implement the changes, items A203 and A204 are added and item A401 is expanded.

- A new Internet service, DNV Exchange Basic, will be launched and implemented into the market during 1999. This service will replace the 4-monthly and the annual survey and certificate sta­tus, currently sent to the owner. This means that the Society will no longer provide the survey and certificate- status .. : on- a 4-monthly basis and it will be the responsibility of the owners to obtain the information from the DNV Internet website. The amended text appesrs in item B902.

Corrections and Clarifications

Besides the above stated rule changes, some corrections and clar­ifications have been made in the rule wording in compliance wit.h current interpretations and the updating of other chapters ·of. the: Rules.

For subscription orders or information about subscription terms, please use distribution@dnv.com. Comprehensive information about DNV and the Society's services is found at the Web site http://www.dnv.com

C Det Norske Veritas AS Computer Typesetting by Division Technology and Products, Det Norsk.e Veritas AS Printed in Noiway by Det Norske Veritas AS July 1999

7.99.2500

If any person suffers losi or damage which i9 proved to have been caused by any negligent act or omiHiOn of Det NOJske Veritas, then Oet NOJske Veritas shall pay compen;sation to such person for his proved direct loss or damage. However, the compensation shall not exceed an amount equal to ten times the fee charged for the service in question, provided that the maximum compensation shall never exceed USO 2 million. ln this provision "Oet Norske Veritas" shall mean the Foundation Det Norske Veritas _as well· as all ita subsi~isries, directors, .officers, employees, .agents and any other actiflil on behalf of Det Norske Veritas. · · ·

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CONTENTS

SEC. 1 CLASSIFICATION PRINCIPLES ................. 1

A. Definitions .... .... .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. ...... ...... ..... 1 A 100 Rules . . . . . . . . . ... . .. .. . . . . . . . . . . . . .. . . . . .. . . . . . . . .. .. . . . . . . . . 1 A 200 Terminology .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 1

B. The Classification Concept .................................... 1 B 100 General .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 1 B 200 Entering into force and application of rules ... .. ..... 2 B 300 Basis for assignment of class . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 B 400 Basis for maintenance of class . . . . . . . . . . . . . . . . . . . . . . . . . . 2 B 500 Documentation . . . . . . . . . . . . . . . . . .. .. .. .. . . . . . . . . . . . . . . . . . . . 2 B 600 Disclosure of information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 B 700 Limitation of the Society's responsibility ............. 3

SEC. 2 SCOPE OF RULES AND CLASS NOTATIONS 4

A. Scope of Rules .. ...... ...... ...... .............. ...... .. .. .. .. .. .. 4 A 100 General .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 4 A 200 Rule parts .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 4 A 300 Rule particulars .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 4

B. Class Notations ................................................... 5 B 100 General .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 5 B 200 Construction symbols .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 5 B 300 Main character of class .................................. 5 B 400 Basic design notations ................. ... :.. ...... ....... 5 B 500 Service restrictions . . . . . . . . . . . .. .. . .. .. . . . . . . . . . . . . . . . . . . . 5 B 600 Additional class: Service and type notations . . . . .. .. . 5 B 700 Additional class: Equipment and systems notations 6 B 800 Additional Class: Special features notations . . . . . .. . . . 6

SEC. 3 CLASSIFICATION PROCEDURE ................ 7

A. Assignment of Class .. .. .. .. .. .... .. .... .. .. .. .. .. .. .. .. ......... 7 A 100 Request for classification .. .... .. .. .... .. .... .. .... .. .. .. 7 A 200 Requirements for workshops and yards . . . . . . . . . . . . . . 7 A 300 Requirements for manufacturers . . . . . . . . . . . . . . . . . . . . . . . 7 A 400 Requirements for suppliers of services . . . . . . .. . . . . .. . 7 A 500 Plan approval .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 7 A 600 Suivey .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 8

A 700 Functional testing .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 8 A 800 Certification of materials, components and equipment 8 A 900 Acceptance of control by National Authorities . . .. .. 9, A 1000 Manufacturing Survey Arrangement . . . . . . . . . . . . . . . . . . . 9 A 1100 Type approval .. .. .. .. .. .... .. .. .... .. .. .. .. .. .. .... .. .. .. . 9 A 1200 Certificate of interim class . . . . . . . . . . . . .. . . . . . . .. .. . . . . . . 9 A 1300 Classification certificate .. . . . . ... . . . . . . . .. .. .. . . .. . . . . . . .. 9 A 1400 · Appendix to the classification certificate . . . . . . . . . . . . . . 9 A 1500 Entry in the «Register of vessels classed with DNV• 9

B. Retention of Class .............................................. 10 B 100 General .. .. .. .... .. .. .. .. .. .. .. .... .. .. .... .. .. .. .. .. .. .. .. 10 B 200 Periodical and renewal suiveys .. .. .... .. .. .... .. .... .. 10 B 300 Suivey of damage........................................ 10 B 400 Suivey of repairs ........................................ 10 B 500 Procedures for maintenance . .. .. .. . . . . . . . . . . . . . . . . . . . . . 10 B 600 Conversions and alterations . . .. .. ... . . . . . . .. . . . . . . .. .. . 10 B 700 Change of ownership .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 10 B 800 Conditions of Class and Memoranda ........ .. .... .. . 10 B 900 Survey reports and survey status . . . . . . . . . . . . . . . . . .. . . . 11

C. Validity and Issuance of the Classification Certificate 11 C 100 Validity of the certificate .... .. ...... ........ ...... .. ... 11 C 200 Issuance of certificate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

D. Suspension and Withdrawal of Class ...................... 11 D 100 General .. .. .. .. .... .. .. .. .. .. .. .... .. .. .. .... .. .. .. .. .. .. .. 11 D 200 Suspension of class . ...... .. ...... .. .. ...... ........ ..... 11 D 300 Withdrawal of class .... .. .. ...... .. .. ...... ........ .... . 11 D 400 Reclassification .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 12

E. Appeals ............................................................ 12 E 100 Decisions taken by the Society ........................ 12

SEC. 4 LEGAL PROVISIONS ............................... 13

A. Liability and Jurisdiction .... .. ...... .. .... .. .. .. .. .. .. .. .. .. • 13 A 100 Limited liability ...... .................................... 13 A 200 Governing law .. ...... .. .. .. .. .. ...... .. .. .... .. .. .... .. .. 13 A 300 Venue ............................ ........ ................... 13

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Rules for Mobile Offshore Units , July 1999 Pt. 1 Ch. 1 Sec. 1 - Page 1

SECTIONl CLASSIFICATION PRINCIPLES

A. Definitions A 100 Rules A 200 Terminology

Contents

B. The Classification Concept B 100 General B 200 Entering into forCe an.d application of_rules B 300 Basis for assignment of class B 400 Basis for maintenance of class B 500 Documentation B 600 Disclosure of information B 700 Limitation of the Society's responsibility

A. Definitions

A 100 Rules

101 The Rules are to be understood as all those rule re­quirements accepted by the Board as basis for classification, which are developed by the Society.

102 Tentative Rules are rules applying to new fields to which the Society reserves the right to make adjustments during a period in order to obtain the intention reflected in the rules.

103 A Guidance note given in the rules is advice which is not mandatory for assignment of class, but with which the Society, in light of general experience, advises compliance, hence, it is for the client to decide whether to apply the note or not.

A 200 Terminology

201 Det Norske Veritas (DNV) is an autonomous and in­dependent Foundation with the object of safeguarding life, property and the enviromnent at sea aud ashore.

DNV undertakes classification and certification and .ensures the quality of ships, mobile offshore units, fixed offshore structures, facilities and systems, and carries out research in connection with these functions.

DNV operates a world-wide network of survey stations and is authorised by more than 120. national administrations to carry out surveys and, in most cases, issue certificates on their behalf.

202 The Society signifies D NV.

203 The Board signifies the Executive Board of PNV through its Chairman who is the President and CEO of DNV.

204 National Authorities denotes the Administration of any country of registry.

205 Client means the party having requested classification or having assumed ownership of a classed unit. In cases where owners have authorised another party to operate the unit on their. behalf, such party is regarded as the client.

206 IMO is the International.Maritime Organization. /ACS is the International Association of Classification Soci­eties.

207 A Recognised Classification Society means a classi­fication society which is a full or associate member ofIACS.

208 Classification comprises those services rendered by the Society in accordance with the rules. Classification of units is conducted in accordance with the requirements of

the rules and any other standards to which reference therein may be made;

209 Assigning Class originally signified designation of a ship according to its standard in one of several classes, ranging from good to bad. Today only the highest class is assigned, comprising the main class, 1A1 or 1A2, and an obligatory additional class notation, e.g. Column Stabi­lized Drilling Unit, where applicable. Voluntary additional class notations may also be. assigned covering special ser­vice, equipment or systems, e.g. EO denoting periodically unattended machinery space.

210 The Classification Certificate is issued upon assign­ment or renewal of class. Its validity is five years subject to successful completion of annual and intermediate surveys.

211 Statutory Certificates means IMO Convention Certif­icates issued on behalf of, or by, National Authorities.

212 Approval, or Approved, denotes acceptance by the Society of plans/descriptions showing design solutions, ar­rangements and/or equipment to comply with the rules. The approval is manifested by the Society's approval stamp.

213 Type Approval is a procedure for assessment of a de­sign against the rule requirements or a standard within the framework of the rules.

The design is to be representative for continuous production.

Guidance note: The terms design assessmeht and production assessment are used to harmonise terminology with the EU terminology.

---e-n-d--o-f--G-u-i-d-a-n-c-e--n-o-t-e-

Guidance note: The term Type Examination is used when the conformity as­sessment of the design is according to EU Directives or against other standards where fitness for use onboard ships, MOUs or HSLC has not been evaluated.

-e-n-d--o-f-G-u-i-d-a-n-c-e--n-o-t-e--_-

214 A Quality Audit is a systematic and. independent ex­amination to determine whether established work processes and quality systems are adhered to.

215 A Supplier or a .Manufacturer, supplies materials, components, equipment and systems to newbuildings to be classed, or to classed units in operation, whose production is subject to design approval, surveys and testing in accord­ance with the rules.

B. The Classification Concept

B 100 General

101 The Classification concept comprises the development of independent technical standards for mobile offshore units, and the verification of compliance with these standards throughout the units' life.

102 The rules are aimed at ensuring safety against hazards to the unit, personnel, and against hazards to the environ­ment.

103 The classification of units is performed in accordance with the requirements of the rules and any other standards to which reference is made.

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Rules for Mobile Offshore Units , July 1999 Page 2 - Pt.1 Ch. 1 Sec. 1

104 Having assigned class, the society will issue a cl.assi­fication certificate and enter the main particulars ;utd .details . of class for the unit in the ·Register of vessels classed with DNV•.

105 The design parameters· for the unit, which are to be specified by the builder, will be stated in an ·~Appendix to the classification certificate". Specific geographical areas found acceptable for .operations may be. stated if requested and provided reliable data for these areas are submitted as basis for approval.

Guidance note: Environmental data considered applicable to world wide opera­tion are gi\'.en in Pt.3 Ch_.1 Sec.4.

---e-n-d--crf--G-u-i-d-a-n-c-e---n-o-t-e---

B 200 Entering into force and application of rules

201 Rules and amendments accepted by the' Board will come. into force when decided by the Board, normally six (6) months after acceptance.

202 The rules which are in force at the date of the written request for classification, are the basis for the assignment and maintenance of class.

Subsequent amendments not made mandatory according to 203 may be made applicahle to units under construction provided both builder and owner agree to such application.

203 If an amendment ·is made mandatory to units under construction or which have already been assigned class, this will be specially stated.

204 Jn exceptional cases, where unacceptable servic.e ex­perience and/or theoretical findings clearly show that safety hazards may arise in connection with itemS, covered by the existing rules, the Society may lay down supplementary re­quirements concerning the· assignment and retention of class to maintain the overall safety standard reflected by the rules.

205 The Society will consider alternatives found to repre­sent an overall safety standard equivalent to that of the rules. Approval. may be revoked . .if subsequent information indi­cates that the chosen alternative is not satisfactory.

206 In cases where detailed requirements are not given in the rules, specific solutions or decisions approved by the Society and its surveyors are to be based on the principles of the rules, and am to give a safety standard eqivalent to that of the rules.

207 In accordance with 205 the Society may consider the use of reliability methods as a means of documenting com­pliance to class requirements. For .applications to hull struc­tures, see Pt.3 Ch. I Sec.3 C700,

B 300 Basis for assignment of class

301 Having assigned a specific class implies that the So­ciety:

- has been satisfied that the unit nieets the rule require­ments for the particular class,

- will, through a system of surveys, verify that the re­quirements stipulated for retention of class are complied with.

302 Prior to assigning class to an eligible, existing unit, it is in general to undergo. all periodical surveys pertaining . to the age and type of the \lnit. See Sec.3 A605.

303 When assigning class to a unit which has not been built under supervision of the Society, provided the unit has been·· h.uilt under'· supervision· ·of ·another recognised classi­fication society, the Society· may on the basis of an overall safety consideration, in connection with a design review and

survey, exempt it from rule requirements for the main class. See also 205.

304 When assigning class to a unit of a series under con­struction to the classification of, or a design previously ac­cepted by, a recognised classification society, the Society may on the basis of an overall safety consideration, in con­nection with the design review, exempt it from the rule re­quirements for the main class, and base the survey on design review done by the recognised society. See also 205.

305 When assigning class to a unit for which National Authorities undertake approval and surveys of items covered by the rules, the Society may accept their decisions as basis of assigning class.

306 The classification of bottom supported units is based on the assumption that adequate precautions are taken to ensure sufficient bearing capacity and resistance to sliding of footings or mats on the sea bed. This will be stated in the •Appendix to the classification certificate• for such units.

The Society may accept decisions by the National Authority with jurisdiction over the waters in which the unit is to op­erate (shelf state), as basis for assigning class.

307 The classification is assuming that safety equipment requirements, outside the scope of classification. as defined in Sec.2 A301, e.g; requirements for life-saving equipment and radiocommunication installations, are enforced by the National Authority in question. In cases when such equip­ment is not certified by the .National Authorities, the certif­ication of such equipment will be enforced by the Society .in accordance with the IMO MODU Code.

308 The classification is assuming that installations speci­fied in Sec.2 A301 related to diving, production, drilling and position keeping are certified by the National Authorities in question.

In cases where such certification is not carried out by the National Authorities, relevant requirements in accordance with recognised codes and standards will be enforced by the Society.

309 In cases where items mentioned under A307 and A308 are considered by the Society, a written statement will be issued upon assignment of class. Maintenance of the valid­ity of this statement. will depend upon satisfactory results of periodical surveys.

B 400 Basis for maintenance of class

401 The requirements for retention of class are found in Sec.3 B. In addition, classification is based on the following assumptions:

Maintenance of the unit and its equipment The unit, machinery installations and equipment are to be maintained at a standard complying with the requirements of the rules.

Installed systems or equipment carried on board in excess of the rule requirements, but otherwise covered by the rules, are either to be maintained in accordance -with the rules or be .removed or be disconnected in such a way as to ensure that. the equipment cannot be used.

Handling of the unit The unit, machinery installations and equipment are to be adequately manned and competently handled. This includes also distribution of ballast and bunkers, and speed and nav­igation in heavy weather. Class conditions regarding the use of the unit are to be observed.

B 500 Documentation

501 All information which may influence the judgement, decisions and requirements of the Society for the purpose of classification, is to be made available to the Society. It is

DET NORSKE VERITAS

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the client's responsibility to ensure that such information is brought to the attention of the. society in a timely manner. Information may be made available by submitting documents to the Society or by surveys performed at the clients prem­ises, the unit or the premises of the client's sub-contractors.

502 Documents for information or approval required in each chapter of the Rules ar.e to .be submitted to the Society.

503 The documentation forming the basis for classification is, at all times, to reflect the true conditions. Revisions of documents are therefore to be submitted to the Society to the extent such revisions may influence decisions and require­ments of the Society.

B 600 Disclosure of information

601 The Society will not disclose any information received or reports made in connection with classification to any other than those entitled thereto according to Table B 1 or those having been given the right to receive information by

.

Table Bl Disclosure of information

Information in question Owner .

New buildings:

a) Approved "as carried out" structure related drawings 2)

b) Approved "as carried Out" system and component drawings 2)

Ships in Operation: .

a) Class and statutory certificates issued by the Society, · dates of surveys, dates and text of Conditions of Class or Recommendations given 4)

b) Survey Reports 4) + I)

Other information: Correspondence with yard or owner 2) 1) Upon request

2) When accepted by owner or ship yard or copyright holder as applicable

3) When accepted by owner or through special clause in insurance contract

4) Automatically available

Rules for Mobile Offshore Units , July 1999 Pt. l Ch. 1 Sec. 1 - Page 3

legislation, court decision or by written permission by the owner.

The supply of information may take place electronically and on a continual basis, e.g. by on-line access to the Society's databases.

602 The Society will not disclose information which can be considered as the property of another party except when this party's permission is given in writing.

603 Internal communication, notes,_ calculations etc. pro­duced within the Society in connection with classification will not be disclosed to other parties.

604 Notwithstanding 601 to 603, anthorised represen­tatives of the National Maritime Authorities or of the audit team of IACS performing Quality Audits, will upon request have access to such information. These representatives_ are to confirm in writing that they are not in any manner allowed to reproduce or_ communicate such information to other parties.

Flag state Port state Insurance Yard or authority authority Company* suppliers

I) 4)

2) 2)

I) 1) 1) ** 1) 2) 3)

2) 2) 2)

• Insurance Company means P&I Clubs and Hull & Machinery Underwriters •• Overdue Conditions of Class, Recommendations only

B 700 Limitation of the Society's responsibility

701 The classification s~rvice is performed on the basic assumption that other parties involved (building yard, de­signers, manufacturers, sub contractors, rig .owners, etc.) fulfil their individual obligations. The. classification service is not performed in substitution of_ other parties' role or_ ob­ligations. Nothing contained.herein or in any certificate, re­port or document issued in -connection with or pursuant to these rules, shall relieve any designer, engineer, builder, manufacturer, shipyard, seller, supplier, owner,_ operator-or other parties from any obligations or consequences of de­fault whatsoever. In particular, compliance with the ru.les does not imply acceptance or commissioning of a unit. This is the exclusive ~esponsibility of the owner.

Any document issued by the Society in relation to surveys performed reflects the condition of the unit at the time of survey. It is the responsibility of the owner to maintain the condition of the unit as required by the rules between sur­veys.

702 No certificate, report, approval, opinion or other statement issued or otherwise communicated, whether orally, in writing or otherwise, by the Del Norske Veritas shall be construed or otherwise taken in any way as verifi­cation, representation, warranty,· confirmation or acknowl­edgement of Year 2000 Conformity, as that expression is defined in "A definition of Year 2000 Conformity Require­ments" issued by the British Standard Institution (BSI DISC PD2000- 1: 1998) or as otherwise howsoever defined. See also Sec.4 AIOI.

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Rules for Mobile Offshore Units , July 1999 Page 4 - Pt.1 Ch. 1 Sec.2

SECTION2 SCOPE OF RULES AND CLASS NOTATIONS

A .. Scope of Rules A 100 General A 200 Rule parts A 300 Rule particulars

B. Class Notations B 100 General

Contents

B 200 Construction symbols B 300 Main character of class B 400 Ba:sic design notations B 500 Service restrictions B 600 Additiorial class: Service a11d type notations B 700 Additional class: Equipment and systems notations B 800 Additional Class: Special features notations

A. Scope of Rules

A 100 General

101 The rules define acceptance criteria for design, con­struction, survey and testing of units, their machinery in­stallation, systems and equipment, applicable to the newbuilding and operational phase.

A 200 Rule parts

201 The present part of the rules, Pt.1, covers all units, newbuildings as well as units in operation.

202 The rules for main class which apply to all newbuild­ings are given in Pt.2, 3 and 4.

203 The rules for additional classes applicable to new­buildings, are given in Pt.5 and 6. Additional classes apply to:

- units which have been designed to perform a special ser­vice.

- special equipment and systems not covered by the main class.

204 The rules for units in operation are given in Pt.7.

A 300 Rule particulars

301 The rules stipulate requirements for the following ar­eas:

Hull .

- strength - constructional fire protection - weathertight and watertight integrity - stability and floatability - tarik. arrangement.

.

MachQ:iery installations, systems and equipment

Machinery installation's~ systems and equipment, including their related auxiliary functions, with respect to strength_ and perform­ance as ·applicable to the following main functions:

- power ~eneration - propulsion - steering - fire protection, detection and extinction - draina~e and bilge pumping - bal!astmg - towing - anchoring and. mooring - jacking self-elevating units - preloading self-elevating units - safety systeins.

Certain machinery installations, regardless of their contribution to the main functions stated above:

- electric power plant

- gravity tanks or pressure vessels and associated piping systems for:

- toxid fluids - fluids with flash point below J00°C - fluids with temperatures above 220°C - boilers and steam piping systems - pressure vessels and associated piping systems_ for com-

pressed ~ases where J?V ;;::::: 15f kNm p = design pressure in kN/m V = pressure vessel volume in m3

- firing and combustion installations

- other installations stated in the rules.

302 Generally, all installations as listed in 301, whether temporarily or permanently mounted, will be covered by the classification. Excemptions from this requirement are installations/equipment frequently taken onboard for stor­age, provided possible inherent hazards are controlled by National Authorities having relevant regulations recognised by the Society.

All weights taken onboard or ashore are however to be re­corded, see Sec. I B306.

303 Inherent in the rules are requirements for reducing the probability for accidental events to occure and for the pre­vention of possible accidental events/loads to become critical accidents. Examples of safety principles in the rules are given in Table Al.

Table Al Safety Principles Accidental -events/loads- - Rule requirements .

Loss of stability (collision, leakage, . malfunction of bal-last system)

Reserve stability and floata-bility

Failure of main structural member (collision, fatigue,

Structural reserve_ strength

etc.) Fire Protection, detection and ex-

. tinction Incorrect operation of ma-chinery systems

Sin3Ie maloperation is not to lea to a critical situation

Failure of machinery compo-nent

Imhortant active components to e redundant

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B. Class Notations .

B 100 .General

101 All units found to satisfy the requirements in Parts 1, 2, 3 and 4, will. be given a main class consisting of a con­struction symbol, a main character of class and a notation for the basic design concept of the unit, e.g.:

!111A1 Column Stabilised Unit or !111A1 Self-Elevating Unit

102 Units also found to satisfy requirements in Pt.5 or Pt.6 may. be given additional class related to special service and type of unit or special systems and equipment respectively. The complete class will. thus consist of:

Main class: ConStruCtion Symbol

I Main· Chii.r.:1.cter of Class f ,,-------·Basic Design Notation + 1A1 Column Stabilised Unit Drilling Unit HELDK SUB

Additional Class: '------t---t- Service and Type Notation

'---!- Equipment and Sys1ems Notation Special Feature Notation

103 Alternatively, an additional class notation which is mandatory as per 602, 603, 604 or 605 may be included as part of the main class notation. Example: !II 1A 1 Column Stabilised Drilling Unit.

104 Other concepts than those mentioned in 101 will be given the basic design notation:

!111A1 Mobile Offshore Unit.

105 Units, which, in addition to the requirements in these rules, comply with the applicable requirements of the Norwegian Petroleum Directorate (NPD) will, if requested, be awarded the symbol (N) after the main class notation, e.g. !II 1A 1 Self-Ele~ating Production Unit (N).

In such cases the symbol (N). denotes that the unit is con­sidered to comply with the Society's interpretation of the applicable requirements of the NPD for the subject items covered by these rules.

The design parameters upon which the (N) class notation has been based will be stated in the "Appendix to the Classi­fication Certificate" for the unit (see Sec. I BIOS).

106 In addition to the class notations, the Society will provide information related to the unit through the •Register of vessels classed with DNV>, see Sec.3 Al500.

B 200 Construction symbols

201 The symbol !II will be given to units built under the supervision of Det Norske Veritas.

202 The symbol !I! will be given to units built under the supervision of another recognised classification Society and later assigned class with Det Norske Veritas.

203 Construction symbols will also be used to denote su­pervision during construction of:

- specialised equipme~ when individual certificates are requested, e.g. !II DSV (diving system).

Rules for Mobile Offshore Units , July 1999 Pt.1 Ch.1 Sec.2 - Page 5

B 300 Main character of class

301 The notation 1A1 will be given to units with ma­chinery and equipment found to be in compliance with the rule requirements stated in Parts. I, 2, 3 and. 4.

B 400 Basic design notations .

401 Notations currently .in use are:

Self-Elevatin!! Unit Column Stabilised Unit.

402 A self-elevating unit is defined as a unit with hull of sufficient buoyancy for safe transport of the unit to the de­sired location. On location the hull is raised to a predeter­mined elevation above the sea surface on legs supported by the sea bed.

403 A column stabilised unit is defined as a unit dependent upon the buoyancy of widely spaced colunms for floatation and stability for all afloat modes of operation or in the rais­ing or lowering of the. unit, as may be applicable.

404 The unit may be designed to carry all its equipment and supplies in transit. Alternatively part of the equipment and supplies may be added to the unit on location and in the operatJ.on mode.

B 500 Service restrictions

501 Service restrictions or operational limits included in the design assumptions of a unit will be stated in the "Ap­pendix to the Classification Certificate", and/or on specllll signboards.

502 Modified rule requirements are in addition given re­lated to the size of the unit and its general arrangement.

B 600 Additional class: Service and type notations

601 Units arranged and/or strengthened for a special ser­vice and found to be in accordance with relevant require­ments in Pt.5 may be given a corresponding additional class. Service and type notations currently in use are shown in Tables Bl to BS.

Table Bl Units for transit and/or location in ice (see Pt.5 Ch.I): ICE-T ICE-L

Table B2 Accommodation and other offshore support units (see Pt.5 Ch.2): Accommodation Unit Fire Fighter I (or II or Ill) Crane Unit·

Table B3 Drillind units and other units for offshore oper-ations (see Pt.5 .3): Drilling Unit or Drilling Unit IN) DRILL or DRILL (N) Pipe Laying Unit Dredger IN) - vessel also complying with the Society's interpretations

of the requirements of the Norwegian Petroleum Directorate within areas covered bv the rules.

.

Table B4 Oil groduction and storage units intended for production an stora~e of crude oil (see Pt.5 Ch.4): Oil Production Unit Oil Production Unit (N)

Oil Production and Storage Unit Oil Production and Storage Unit (N) IN) = vessel also complying with the Society's interpretations

of the requirements of the Norwegian Petroleum Directorate within areas covered by the rules.

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Rules for Mobile Offshore Units , July 1999 Page 6 - Pt.1 Ch. 1 Sec.2

Table BS Offshore loadin2 buoy (see l't.S Ch.S): Offshore Loading Buoy Offshore Loading Buoy IN) INI

.

= vessel also complying with the Society's interpretations of the requirements of the Norwegian Petroleum Directorate within areas covered by the rules.

Table B7 Units for offshore sunnort (see 607): Sunnort Unit .

Support Unit IN) .

INI = vessel also cOmplying with the Society's interpretations of the requirements of the Norwegian Petroleum Directorate within areas covered by the rules.

Table.BS Structural strenoth (see 608) Structure IN) ..

(N) - vessel also complying with the Society's interpretations of the requirements of the Norwegian Petroleum DirectOrate within areas covered by the rules. .-

.

.

.

602 For units primarily to be used for accomniodation of personnel the additional class notation Accommodation Unit is mandatory. .

603 For units to be used for drilling the additional class notation Drilling Unit is mandatory.

604 For units to be used for oil production the additional class notation Oil Production Umt or Oil Production and Storage Unit is mandatory.

Requrrements for the. production plant are given in Pt.6 Ch.6.

605 For catenary anchored buoys the additional class no­tation Offshore loading Buoy is. mandatory.

606 A unit for which towing assistance will be required during transit may be assigned the additional notation ~on­selfpropelled unit.

607 The Support Unit class notation covers units intended for offshore support functions. These units may be fitted with only part of the equipment necessary to perform ac­commodation, drilling or production operations. However, parts of the requirements in Pt.5 Ch.2, Ch.3 and Ch.4 and Pt.6 Ch.5 and 6 may be relevant to be complied with.

Relevant rule requirements complied with will be listed in the "Appendix to the Classification Certificate".

608 Units, which comply with the Society's interpretations of the applicable Norwegian Petroleum Directorate (NPD) requirements pertaining to structural strength will, if re­quested, be awarded the additional class notation: Struc-ture (NJ. . The design parameters upon which the IN) class notation has been based will be stated. in the "Appendix to the Classi­fication Certificate" for th.e unit (see Sec.1 B105).

B 700 Additional class: Equipment and systems notations

701 Units having special equipment or systems found to satisfy relevant reqmrements in Pt.6, will be given corre­sponding additional class. Equipment and systems notations currently in use are shown in Tables B9 to Bl5.

Table B9 Miscellaneous notations (see l't.6 Ch.1): HELDK helicnnter deck

CRANE crane .

DSV diving system (see separate publication «Rules for Certification of Diving Systems.») .

• .

Table BIO Position moorin2 (see l't.6 Ch.2): POSMOOR Mooring sy,stem for posi-

tioning of unit in vicinity POSMOOR 1-V or -TA or -ATA) of other structures.

v - mooring in the vicinity of other struCtures .

TA,ATA = mo~~ syste?1s designed for thruster . assist moonng .

Table Bll Ch.3):

Periodically unattended machinery space (see l't.6

EO ..

Table Bl2 Additional f"Ire nrotection (see l't.6 Ch.4): .

F-A for accommodation space F-M for machinerv soace .

F-AM for accommodation ilnd machinery spaces

Table B13 Drillings}lant. Equipment, structures and sys-terns. (see l't.6 Ch. : DRILL I Coverin'g'the safety of drilling riglinstalla~ion and DRILL IN) I tlwse onboard, (N) = vessel also complying with the Society's interpretations

of the requirements of the Norwegian Petroleum Directorate within areas covered by the rules.

Table B14 Dynamic nositionin2 systems (Pt.6 Ch. 7): DYNPOS-T semi-automatic position keeping system ·

without redundancy DYNPOS-AUTS automatic position keeping· system without

redundancy_ DYNPOS-AUT automatic position keb/n~ system, with a

remote thrust control ac -up and a posi-tion reference back-up

DYNPOS-AUTR automatic position keeping system with re-dundancy in technical design

DYNPOS-AUTRO automatic position keeping system with re-dundancy in technical design and physical arrangement

Table BIS Management of safe unit operation and pollution prevention (see l't.7 Ch.S): SBM jMa_nageme1!t of safety and environment protection in . . unit ooeration· ·

B 800 Additional Class: Special features notations

801 Special features notations provide information regard­ing special design assumptions, arrangements or equipment which are not covered by the main class requirements or the other additional class notations.

Special features notations currently in use are shown in Ta­ble B16.

Table B16 Column stabilised units strengthened for opera­tion when restin2 on the sea bed (see l't.3 Ch.2): SUB

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Rules for Mobile Offshore Units , July 1999 Pt.1 Ch.1 Sec.3 - Page 7

SECTION 3 CLASSIFICATION PROCEDURE

Contents

A. Assignment of Class A 100 Request for classification A 200 Requirem'ents for workshops and· yards A 300 Requirements for manufacturers A 400 Requirements .for suppliers of services A 500 Plan approval A 600 Survey A 700 Functional testing A 800 Certification of materials, components and equipment A 900 Acceptance of control by National Authorities A 1000 Manufacturing Survey Arrangement A 1100 Type approval A 1200 Certificate of interim class A 1300 Classification certificate A 1400 Appendix to the classification certificate A 1500 Entry in the «Register of vessels classed with DNV~

B. Retention of Class B 100 General B 200 Periodical and renewal surveys B 300 Survey of damage B 400 Survey of repairs B 500 Procedures for maintenance B 600 Conversions and alterations B 700 Change of ownership . B 800 Conditions oJ Class and Memoranda B 900 Survey reports and survey status

C. Validity and Issuance of the Classification Certificate C 100 Validity of the certificate C 200 Issuance of certificate

D. Suspension and Withdrawal of C.lass D 100 General D 200 Suspension of class D 300 Withdrawal of class D 400 Reclassification

E. Appeals E 100 Decisions taken by the Society

A. Assignment of Class

A 100 Request for classification

101 A request for classification of a unit is to be submitted in writing by the client.

A 200 Requirements for workshops and yards

201 Prior to commencement of work the builder and sub­contractors have to develop and implement a relevant quality system, which will be evaluated by the Society. The evaluation will be performed in the initiation phase of the project and will be a combination of:

- quality programme review - audit to verify the implementation of and adherence to the

procedures.

202 The quality is to . be documented in a quality system program which as a minimum is to cOntaiil d~scriptions Of procedures and job instructions covering the most important quality affecting activities for:

- structural design, procurement and .fabrication (see Pt.3 Ch.I Sec.10)

- machinery, equipment and piping installation and testing

- electrical/instrumental installation· and testing.

Guidance note: A buµder of a mo~ile offsh9re unit is expected to have a quality system corres.pondmg to the ISO 9000 series or equivalent.

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203 During fabrication and construction work, the Socie­ty's surveyors are to have safe access to the works at all reasonable. times, insofar as the work affeCts ·classification. The client is to ensure, through contracts with the parties concerned or otherwise, that such access is possible and that the Society is notified as to when and where th~ sur­veyor's attendance is needed.

204 The following general documentation from the builder (workshop and yard) . and from subc_ontractors (as specified m 301) 1s to be submitted when requested by the Society:

- outline specification for the unit - list of subcontractors to the building yard · - list of subcontractors to the manufacturer of products to

be delivered, if applicable.

A 300 Requirements for manufacturers

301 Manufacturers of materials, components and equip­ment of categories not covered by 200 are to be considered for approval according to criteria established by the Society, as applicable.

302 Any required quality control of materials, components and equipment, is to be traceable and documented in writ­ing. Furthermore, it is to be carried out by qualified per­sonnel at facilities and with equipment suitable for that control.

A 400 Requirements for suppliers of services

401 Suppliers providing services on behalf of the owner, such as measurements, tests and maintenance of safety sys­tems and equipment, the result of which may form the. basis for the surveyor's decisions, are to be approved by the So­ciety, according criteria established by the Society.

Wh~re surveyors use such services in· making decisions af­fecbng statutory certifications, the suppliers are subject to approval by the Socjety, where the Society is so authorised by the relevant flag Administration. For such services the Society may accept approvals done by the flag Adminis­tration,. or duly authorised organisations acting on behalf of the flag Administration.

A 500 Plan approval

501 The builder or manufacturer is to submit before the production commences:

- plans and specifications required for approval in tripli­cate, and one copy for each of possible sister units

- corresponding technical descriptions, calculations and data, including material specifications,

as specified in the applicable chapters of the rules, and ac­cording to documentation lists supplied by the Society upon receipt of class request.

Any documents submitted for re-approval are to be specially marked to identify the revised parts.

The builder, with which the Society has the classification contract, is responsible for co-ordinating that plans and_ other

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Rules for Mobile Offshore Units , July 1999 Page 8 - Pt.1 Ch.1 Sec.3

documents are submitted, and for distributing any approval comments that may have been given.

502 When a unit, which is not built under supervision of the Society, is to be classified, the information required in 501 is in general to be submitted for approval. The extent of documentation approval for a unit which is classed, or previously has been classed with another recognised classi­fication society, will be decided in each case.

503 Plans which have been found to comply with Rule requirements will be provided with an •approved• stamp. Conditions and limitations of the approval may be stated on the plans, or in the accompanying return letter of approval.

504 The approval may be revoked at any time if sub.se­quent information indicates that the design solution was contrary to the rule requirements or intentions.

505 For type approved products, where the basis for ap­proval is the rules of the Society, plans and technical de­scriptions of the product need not be submitted for approval for each unit unless otherwise stated as a condition on the type approval certificate;

In such cases only the arrangement or system plans, inter­face plans and those plans mentioned on the type approval certificate shall be submitted for approval.

A 600 Survey

601 When a unit is built under the supervision of the So­ciety, the Society will verify:

~ that the construction and scantlings comply with the rule requirements and the approved plans, and that the re­quired materials are used

- that the materials, components and equipment have been certified in accordance with the rules

- that the work is carried out in compliance with the rules and with normal good practice

- that satisfactory tests are carried out to the extent and in the manner prescribed by the rules.

Supervision is to be carried out at the building yard and/or the sub-suppliers at the discretion of the Society, which also decides the extent and method of control.

602 The verification method applied by the Society at the building yard or at the manufacturers' will normally be based on visual inspections and tests.

The Society may base its verification on audits of an ac­cepted quality system implemented at the yard or at the ma­nufacturer in combination with an agreed manufacturing survey. arrangement.

603 When a unit which has not been bnilt under the su­pervision of the Society. is to be classified, the Society will carry out surveys to confirm:

- that the design and scantlings comply with the approved plans

- that the material, components and equipment are in ac­cordance with the rules

- that the workmanship is in compliance with the rules and with normal good practice.

Functional tests are to be c.arried out as deemed necessary.

604 For units built under the supervision of another re­cognised society . the requirements of 603 will normally be considered as complied with for the main class.

605 When an existing unit is to be classified it is in general to undergo all periodical surveys pertaining to the age and type of the unit. Units previously classed. by a recognised society will, as a minimum~ be subjeCt to annual survey, in accordance with Pt. 7 Ch.2, with special emphasis on the unit's general condition and including thickness measure-

ments for units of age exceeding 10 years. In addition, any periodical surveys due with the previous society are to be carried out.

If the age of the unit exceeds 20 years it is to undergo a re­newal survey irrespective of when this is due with the pre­vious society.

A 700 Functional testing

701 A test programme is to be worked out by the builder to the satisfaction of the surveyor. The programme is to specify systems, components and equipment to be tested and testing procedure. The programme is to include sea trials of the unit with machinery and equipment installed.

702 The tests are to give evidence as to satiSfactory oper­ation in accordance with the rules. When testing the control and safety equipment, failure modes are to be simulated as realistically as possible.

703 Unless ot4erwise agreed, the testing required by the rules is to be carried out in the presence of the surveyor. Data are to be recorded to the extent considered necessary by the surveyor.

A 800 Certification of materials, components and equipment

801 In order to ensure that materials, components, equip­ment and systems used in units to be classed by the Society conform to the rules and other standards within the frame­work of the rules, product certification is required in ac­cordance with applicable chapters of the rules.

The product certification is a conformity assessment nor­mally including both design and production assessment.

The production assessment includes inspection and testing during production and/or of the final product.

802 Product certification is to be documented by the fol­lowing types of documents:

1) Det N orske V eritas Product Certificate (NV):

A document signed by a surveyor of the Society stating:

- conformity with rule requirements - that tests are carried out on the certified product itself - that tests are made on samples taken from the certified

product itself - that tests are performed in presence of the surveyor

or in acco~dance with special agreements.

2) Works Certificate (W):

A document signed by the manufacturer stating:

- conformity with rule requirements - that tests are carried out on the certified product itself - that tests are made on samples taken from the certified

product itself - that tests are witnessed and signed by a qualified de­

partment of the manufactorer.

3)Test Report (TR):

A document signed by the manufacturer stating:

- conformity with rule requirements - that tests are carried out on samples from the current

production.

The applicable chapters and sections of the rules will specify which of the above mentioned documentation will be re­quired.

803 Where the rules require Works Certificate (W) or Test Report (TR), the surveyor may at any time require tests to be carried out in his presence and/or check elements of the quality control in operation.

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804 For identification and traceability, certified products are to be stamped in accordance with the marking given in the product certificate and as specified by the applicable chapters of the rules.

805 To ensure an efficient, cost effective and correct cer­tification process, a General Certification Agreement is nor­mally to be established with manufacturers delivering NV certified products.

The General Certification Agreement may be part of a Ma-nufacturing Survey Arrangement. ·

The General Certification Agreement is to include informa­tion on the procedures for design and production assessment and on transfer of information and experience between the Manufacturer and the Society.

A 900 Acceptance of control by National Authorities

901 In cases where the Administration of a flag state re­views plans, carries out type approval, and surveys the unit and/or its components and equipment in accordance with the rule requirements, consideration will be given to the ac­ceptance of this control as basis for the assignment of cfass. For this consideration, and as proof of compliance, copies of approved plans, reports and other particulars which would otherwise be required to be approved by the Society, have to be submitted.

A 1000 Manufacturing Survey Arrangement

1001 When .the procedures and processes . of a building yard's or a manufacturer's quality system meet the quality, safety and environmental standard of the rules, a Manufac­turing Survey Arrangement (MSA) may be established with the yard or the manufacturer as an alternative to the verifi­cation and production assessment described in the applicable rule chapters.

1002 The agreed MSA is to be described in a document stating the requirements, scope, acceptance criteria, doc­umentation and the roles of the Society and. the yard or the manufacturer in connection with the p'roduction assessment.

A 1100 Type approval

1101 Type approval is a procedure for design assessment. Type approval can be applied to a:

- product - group of products - system.

This procedure should normally be used for design assess­ment of standard designs.

1102 The type approval procedure will normally consist of the following elements:

- design approval - type testing - issuance of type approval certificate.

The type approval procedure used by the Society is de­scribed in Certification Note No. 1.2.

1103 For certain products, equipment and systems as de­fined in applicable chapters of the rules, type approval is sufficient as the assessment needed for conforming product quality, i.e. production assessment is not required.

1104 For certain products, equipment and systems as de­fined in ·the applicable chapters of the rules, ·type approval is.a mandatory. procedure for design· assessment.

1105 For products, equipment and systems manufactured for stock, type approval is to be the riormal procedure for assessment of design.

Rules for Mobile Offshore Units , July 1999 Pt.1 Ch. 1 Sec.3 - Page 9

A 1200 Certificate of interim class

1201 When the surveyor is of the opinion that the require­ments corresponding ·to the class in question have been met, he will document the completion of the building supervision by issuing the certificate of interim class, which is valid until the Administration of the Society has confirmed the cfass and issued the cfassification certificate.

1202 At the discretion of the surveyor the building super­vision niay be considered to be completed with some minor items unverified, provided Conditions of Class (see B800) are issued to the effect that the remaining work, surveys or other measures are to be completed within a specified time. At the same time the surveyor will document the completion of the newbuilding supervision by issuing the certificate of interim class as indicated in 1201.

1203 In case of classification of an existing unit not bnilt under the supervision of the Society, or classification of an existing unit previously classed by the Society, the surveyor will issue the certificate of interim class when he is satisfied that the applicable requirements have been met.

A 1300 Classification certificate

1301 When the Administration of the Society has examined the surveyor's report and is satisfied that the requirements corresponding to the class in question have been met, the class will be assigned and a classification certificate will be issued.

Provided the requirements for maintenance of cfass will be complied with, and unless the class. has been withdrawn or suspended in writing at an earlier stage, the classification certificate will be valid for 5 years for units with main character of class 1A1 .

1302 Declarations confirming compliance with the rules may upon request be issued for propnlsion machinery and specific additional cfass notations, provided the Society's main class has been assigned.

A 1400 Appendix to the classification certificate

1401 Conditions regarding the use of the unit which were established or presumed at the time of class assignment, are to be presented in the "Appendix to the cfas.sification certif­icate".

A 1500 Entry in the «Register of vessels classed with DNV,,

1501 When a unit has been assigned cfass, its main partic­ulars and details of class will be entered in the •Register of vessels classed with DNV•. In addition to the.class and re­gister information, an appropriate type descriptive note may be entered in the register, indicating the type of the unit in greater detail than given io the class and register informa­tion, and/or providing additional information on the unit's functions, design and construction. This descriptive note is provided for information only and is not to be regarded as part of the unit's class notations.

1502 For units built under the supervision ·of the Society, the class is entered with a statement of the year and month from which the periodical surveys will be dated. For other units a notation is made of the year and month of completion of the survey mentioned in 605. ·

1503 If the unit is not immediately commissioned upon completion of the building supervision, the unit is subject ·to a condition survey at the time when she enters service. Provided the result of this survey is in all respects satisfac­tory, subsequent periodical surveys will date from the time of the condition survey.

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Rules for Mobile Offshore Units , July 1999 Page 1 O - Pt. 1 Ch. 1 Sec. 3

B. Retention of Class

B 100 General

101 In order ro retain. a unit'sdass with. the Society, the owner is· to:

- submit complete and correct information on the unit and its use, which would be of significance ro the Society.for its assessment of the condition of the unit in relation to the rules

- submit complete· and correct information on ·the owner­ship and management of the unit, addresses and corre­sponding administrative information . pertinent ro the relations with the Society

- subject the unit to prescribed periodical and renewal sur­veys, surveys. of damage, repairs, conversions and alter­ations

~ subject the unit to unscheduled surveys when deemed necessary by the Society

- carry out Conditions of Class (see 800) specified by the Society in accordance with the rules within the given time limit

- pay. all due fees and.expenses.

102 It is the duty of the owner to request surveys from the Society and to· provide the assistance and safe access re­quired ro the extent necessary for completion of the surveys in acc.ordance with the rules.

B 200 Periodi.cal and renewal surveys

201 A unit is ro be subjected to surveys with frequency and extent stipulated in Pt. 7 Ch.2.

S<o>rveys covered by the rules which are carried out by Na­tional Authorities of the flag state may be accepted as basis for the retention of the class, subject ro the provisions of A900.

202 Survey during Iay-up, see Pt.7 Ch.2 Sec. I B500.

B 300 Sur.vey of damage

301 If the hull, machinery installations or equipment cov­ered by classification sustain damage of such extent that it may be presumed to. lead to a Condition of Class (see 800), the Society is I<> be informed without delay. The unit is IQ be surveyed at the first oportunity according to further in­structions from the Society. The survey is to be of the ex' tent which the· surveyor C:onside'rs· necessary for ascertaining the amount of damage.

B 400 Survey of repairs

401 When hull; machinery installations or equipment which are covered by classification are ro be subjected to repairs of any significance, the work is to be Carried out under supervision of the surveyor, according to' the applica' ble rules.

B 500 · Pr9cedures for maintenance

501 When referring ro proc~dures for maintenance in the rules, these are normally meant to be procedures recom­mended.by,the .supplier. of the relevant equipment or systems or ro other applicable recognised standards for the· equip­ment or system in ·question.

B 600 Conversions and alterations

601 If hµJl, machinery installations, .equipment or 5ystems covered by classification are ro be converted or altered, the changes are to be documented and are to be approved by the Society in a~vance.

602 Alterations to hull, machinery and equipment made possible by amendments of the applicable rules may be un­dertaken provided the general safety and performance stan­dard required for retention of cl:iss will be maintained,

603 The conversion. or the alteration is ro take place under the surveyor's supervision in the same manner as for new constructions.

B 700 Change of ownership

701 A unit retains class when transferred to another owner, with the exception of class notations based.oncer­tification of management of. operations' which will be de­leted. automatically.· In the case of such. transfer the previous owner is to give the Sqciety a written notice immediately. Until this has been done communication with binding effect will be sent ro the previous owner.

B 800 Conditions of Class and Memoranda

801 If it is found that rule requirements implied by cl:issi­fication are not satisfied, the Society will issue a Condition of Cla.ss on any improvements, new surveys or other m.eas­ures · found necessary in order to retain the class with the Society, regardless of whether the matter referred to has previously been approved.

Conditions of Class constitute requests by the Society in ore der to ensure compliance with the rules. They are not to be considered as. advice.

802 If the Society deems it pecessary to have technical measurements.or other examinations carried out to.ascertain whether damage has been sustained or is imminent, a Con­dition of Class hereon will be issued.

803 Conditions of Ciass and Memoranda ar.e defined as follows:

- Conditions of Class to be carried out, abbreviated CC, are requirements ro the effect that specified operations (e.g. repairs, adjustments, reinforcements or surveys) are to be carried out within a specified time limit (if ne­cessary immediately).

- Memoranda for owners, abbreviated MO, are informa­tion to the owners, and may be additional to the class related information contained in the Operating Manual, exemptions from rule requirements, minor da~ge con­sidered of no importance to the unit's safety, etc .. Mem­oranda for owners will not require_.- repairs or surveys to be carried out.

Guidance note: Conditions covering. requirements. outside the ~cope of classi­fication issued by, Oi on behalf of, NatiOnal Authorities, will be abbieviated CA. ,

--e-n-d---o-f--G-.u-i-d-a.,-n-:c-e-.--n-o-t-e---

804 CC .and MO are sent in writing ro the owners. CC for immediate frilfillment of given conditions can .be made verc bally, provided the representative of the owners accepts the CC and the surveyor ensures that the CC has been carried out before the unit leaves port. · ·

DET NORSKE VERITAS

805 The Society may at any time alter a CC or MO if this is considered necessary.

806 A Written CC or MO will be deleted when by survey or other means the Society has· established that the require­ments have .been fulfilled. A verbal CC is revoked when a subsequent survey proves thatJhe. repair is satisfacrory.

B 900 Survey reports and survey status

901 ' The surveyor will· prepare and submit to the owner reports on all surveys which have been carried out and issue Conditions of Class and Memoranda, when relevant.

902 The Society will make available survey and certificate status reports, to owners, via.the DNV Internet website. It is the owners responsibility to obtain this information from the DNV Internet website. Suryey and certificate status re­ports, on paper, will be distributed by special request, only.

C. Validity and Issuance of the Classification Certificate

C 100 Validity of the certificate

101 When the renewal surveys for hull, machinery instal­lations and equipment have been completed to the surveyor's satisfaction, he will extend the validity of the classification certificate.

102 When the administration of the Society has examined the surveyor's report and is satisfied that the requirements corresponding to the main class assigned have been met, the retention of class will be confirmed by the issuance of a new classification certificate.

103 The validity of the classification certificate given in 102 will be 5 years for units with main character of class 1A1, provided that the annual and intermediate surveys given in Pt. 7 Ch.2 Sec.2 are carried out at intervals and within the time windows required in Pt.7 Ch.2 Sec.I Al03.

C 200 Issuance of certificate

201 For renewal surveys completed within 3 months be­fore the expiry date of the existing certificate, the new cer­tificate will be valid to a date not exceeding '5 years from the expiry date of the existing certificate.

202 For renewal surveys completed after the expiry date of the existing certificate, the new certificate will be valid to a date not exceeding 5 years from the expiry date of the existing certificate.

203 For renewal surveys completed more than 3 months before the expiry date of the existing certificate, the new certificate will be valid to a date not exceeding 5 years from the completion date of the renewal survey.

204 In cases where postponement has been granted as sti­pulated in Pt. 7 Ch.2 Sec. I A600, the new certificate will be valid to a date not exceeding 5 years from the expiry date of the existing certificate before postponement was granted.

205 In cases where the renewal surveys are carried out concurrently with major conversions and/or alterations re­quiring a long conversion time, the validity of the new cer­tificate will normally be 5 years from the date of the completion and/or alteration.

Rules for Mobile Offshore Units , July 1999 Pt.1.Ch.1 Sec.3 - Page. 11

D. Suspension and Withdrawal of Class

D 100 General

101 The Society may suspend or withdraw a unit's class in cases where the assumptions. as. the basis. for_c]assifipation, .octhe.proyi~ions for retention of class,_ hav.~ }>een viola~d.

102. The decision to suspen\i or withdraw a unit's class is made by the administration of the So~iety. However, in cases of automatiC suspension, see 201 and 202, ·no ·indi­vidual decision is made.. Suspension or .withdrawal of c_lass may take effect immediately or after a specified period of time.

103 If the owner's default only affect$ conditions related to special notations, the. suspension or withdrawal may .be limited to these class notations only.

D 200 Suspension of class

201 If the renewal surveys for hull, machinery installations and equipmeilt related to main character of class as defmed in Sec.2. B are not carried out before the expiry date of.the classification certificate, and if no postponement has been granted as stipulated in Pt.7 Ch.2 Sec.I A700, the class will be automatically suspended with immediate effect (see also 302) unless the surveys are under completion.

202 If the annual or intermediate surveys required in CI 03 are not carried out within 3 months from the anniversary date of the classification certificate the class is automatically suspended with immediate effect.

203 In addition to the conditions laid down in 20 I and 202, a unit's class or additional class notations may also be suspended with immediate effect by the administration of the Society in cases where repair of deficiencies are not carried out to the surveyor's satisfaction or othetwise dealt with in an appropriate manner within the time limits given by the surveyor.

204 The Society may further decide to suspend a unit's class if the unit cannot be submitted to the required surveys; for instance due to a major casualty, or other force majeure cases.

205 Where a suspension of class has come into effect the Society will:

- notify the owner in writing - notify the proper authorities in the country where the unit

is registered - make an entry to this effect in the first issue of the

•Register of vessels classed with DNV• or its supple­ment.

D 300 Withdrawal of class

301 The class will be withdrawn at the owner's request.

302 If the outstanding surveys specified in 20 I and 202 or required repairs as given in 203 are not carried out within a specified time after the class suspension, the Society may decide to withdraw the unit's class.

303 When any unit proceeds to sea without having recti­fied a condition of class which was required to be dealt with before leaving port, the class will be withdrawn with imme­diate effect.

304 If the outstanding debt owed to the Society is not paid within a fixed date, the Society may withdraw the unit's class with one month's written notice. This also applies when the obligation to pay rests with a yard or with the

DET NORSKE VERITAS

Rules for Mobile Offshore Units, July 1999 Page 12 - Pt.1 Ch.1 Sec.3

unit's previous owners; In special cases a shorter notic·e may be given.

305 Where a withdrawal of class has come into effect the Society will:

- notify the owner in writing - notify the proper authorities in the country where the unit

is registered · . - make .an entry to this effect in the first issue of the

.Register of v.essels classed with DNV• or its supple-ment. -

- make the information available to underwriters.

D 400 Reclassification

401 If the outstanding surveys leading to class suspension as given in 20 I and 202 or required repairs as given in 203 are carried out within a specified time, the class will be reinstated and the existing classification certificate retains its validity.

402 In all other cases than that given in 40 l, and if the circumstances leading to. withdrawal of class no longer ex­ists, a unit's class may only be reinstated based upon a written request from the. owner. The survey extent will in

such instances be dependent upon the unit's classification status at the time of suspension or withdrawal.

403 When the surveyor is satisfied that the applicable re­quirements given in 402 have been met, he will issue. a cerc tificate of interim class which will remain valid until the administration of the Society has confirmed the class and issued the classification certificate.

404 When the class is reinstated, the Society will confirm the reinstatement in writing to the owners and to the Au­thorities in the country where ·the unit is registered and make the information available to any third party upon request.

· E. Appeals

E 100 Decisions taken by the Society

101 The client may request that a decision by the Society is to be taken up for reconsideration by one or more sur­veyors specially appointed by the Society. The expenses incurred are to be paid by . the party making the appeal, however, if the earlier decision is revoked, the expenses will be covered by the Society

DET NORSKE VERITAS

Rules for Mobile Offshore Units , July 1999 Pt. 1 Ch. 1 Sec.4 - Page 13

SECTION 4 LEGAL PROVISIONS

Contents

A. Liability and Jurisdiction A 100 Limited liability A 200 Governing law A 300 Venue

A. Liability and Jurisdiction

A 100 Limited liability 101 If any person suffers loss or damage which is proved to have been caused by any negligent act or omission of Det Norske Veritas, then Det Norske Veritas shall pay compen­sation to such person for his proved direct loss or damage. However, the compensation shall not exceed an amount equal to ten times the fee charged for the service in question,

provided that the maximum compensation shall never exceed USD 2 million.

In this provision "Del Norske Veritas" shall mean the Foundation Del Norske Veritas as well as all its subsidiaries, directors, officers, employees, agents and any other acting on behalf of Det N orske Veritas.

A 200 Governing law

201 These Rules, the classification of the unit and the re­lationship between the Society and other parties shall be governed by Norwegian law.

A 300 Venue

301 Any dispute arising in relation to or as a consequence of these Rules shall only be resolved by the courts of Nor­way, the Municipal Court of Oslo being the proper venue.

DEr NORSKE VERITAS