OGP Diving

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Diving Recommended Practice

Report No. 411 June 2008

I n t e r n a t i o n a l A s s o c i a t i o n o f O i l & G a s P r o d u c e r s


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P ublications

Global experience

Te International Association o Oil & Gas Producers has access to a wealth o technicalknowledge and experience with its members operating around the world in many differentterrains. We collate and distil this valuable knowledge or the industry to use as guidelines

or good practice by individual members.

Consistent high quality database and guidelines

Our overall aim is to ensure a consistent approach to training, management and best prac-tice throughout the world.

Te oil and gas exploration and production industry recognises the need to develop consist-ent databases and records in certain elds. Te OGPs members are encouraged to use theguidelines as a starting point or their operations or to supplement their own policies andregulations which may apply locally.

Internationally recognised source of industry information

Many o our guidelines have been recognised and used by international authorities andsa ety and environmental bodies. Requests come rom governments and non-governmentorganisations around the world as well as rom non-member companies.

Disclaimer

Whilst every effort has been made to ensure the accuracy o the in ormation contained in this publication,neither the OGP nor any o its members past present or uture warrants its accuracy or will, regardlesso its or their negligence, assume liability or any oreseeable or un oreseeable use made thereo , whichliability is hereby excluded. Consequently, such use is at the recipients own risk on the basis that any useby the recipient constitutes agreement to the terms o this disclaimer. Te recipient is obliged to in orm any subsequent recipient o such terms.

Tis document may pro ide guidance supplemental to the requirements o local legislation. Nothingherein, however, is intended to replace, amend, supersede or otherwise depart fom such requirements. Inthe event o any conict or contradiction between the pro isions o this document and local legislation, applicable laws shall prevail.

Copyright notice

Te contents o these pages are Te International Association o Oil and Gas Producers. Permissionis given to reproduce this report in whole or in part pro ided (i) that the copyright o OGP and (ii)the source are acknowledged. All other rights are reserved. Any other use requires the prior written permission o the OGP.

Tese erms and Conditions shall be go erned by and construed in accordance with the laws o Eng-land and Wales. Disputes arising here fom shall be exclusively subject to the jurisdiction o the courts o England and Wales.


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Acknowledgements

Tis recommended practice was produced by the OGP Diving Operations Subcommittee


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able o contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

2 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

3 Organisation and responsibilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

4 Pre-award activity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34.1 Project execution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2 Tird party operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3 Management audits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4 Inter acing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

6 Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

6.1 Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.2 Communicate expectations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.3 Expectations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5 Roles and responsibilities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.6 Competence assessment process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.7 Audit plan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.8 In ormation validation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.9 Workscope and procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.10 Mobilisation/demobilisation planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.11 Demobilisation plan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.12 Risk assessment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.13 Emergency response plan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.14 Management o change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.15 Accident investigation and reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.16 Notication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.17 Bridging document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 Execution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237.1 Site rules (worksite) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.2 Risk assessment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7.3 Sa ety briengs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.4 Permit to Work process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 Health and medical care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.6 Care o the environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.7 Progress reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.8 Operations/projects progress reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8 Measuring and improving. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268.1 Closeout report guidance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


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AppendicesAppendix 1 Atmospheric diving suit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendix 2 Habitat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix 3 Inshore /inland diving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix 4 Live boating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Appendix 5 Mobile/ portable sur ace supplied systems or scuba replacement. . . . . . . . . . . . . . . . . . . . . . . Appendix 6 Observation diving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix 7 s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix 8 Saturation diving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix 9 Sel contained underwater breathing apparatus - scuba . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix 10 Sur ace supplied offshore diving - air / . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix 11 Sur ace supplied mixed gas diving - . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix 12 Sur ace swimmer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix 13 Bounce or UP diving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix 14 Scientic & archaeological diving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tablesable 1 proximity to a recompression chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .able 2 maximum bottom times. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Abbrevations and denitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 42


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Diving Operations involve a unique combination o occupational health and sa ety issues per ormedin an un orgiving environment where errors can quickly develop into atal accidents. Individualrisks must be managed i diving is to be conducted in a sa e and efficient manner.

Tere are a variety o regulations, standards and industry guidelines that apply to Diving.

o provide members engaged in the Oil, Gas, Alternative Energy and associated Activities with aclear and uni orm approach to the minimum standards required or managing diving operations,Te International Association o Oil & Gas Producers (OGP) Diving Operations Subcommittee hasdeveloped this Recommended Practice ( ). Tis is based upon current experience and industrybest practice or preventing atalities and serious incidents.

1 Introduction

2 Scope

It is recommended that this is applied by OGP members in respect o any operation involvingdiving or sur ace swimmers conducted within their sphere o inuence or responsibility being:

Diving Operations using:

Air

SaturationAtmospheric Diving Suits

Observation Diving in support o diving operations

Including:Sur ace Supplied Air diving, using Air or as the breathing medium either in theoffshore environment (see Appendix 10 & 5). Inshore/Inland (Appendix 3) or Scientic &Archaeological (Appendix 14)Saturation Diving using mixed gas or sometimes air as the breathing medium (Appendix 3)

Sur ace supplied mixed gas diving using or (see Appendix 11)


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3 Organisation and responsibilities

Actions and activities o various personnel can affect the sa ety o diving operations even thoughthey are not members o the dive team. Tese include:

Te Client who has placed a contract with a diving contractor to deliver a diving project will

usually be the operator or owner o a worksite, proposed or existing installation, pipeline orumbilical where diving work is going to take place, or a principal contractor acting on behal othe operator or owner. Te operator or owner should appoint on-site representative(s) and anysuch persons should have the necessary experience and knowledge to be competent or this task.Te client shall also ensure that all simultaneous activities are managed to ensure the sa ety othe diving operation.Te Principal Contractor carrying out work or the client and overseeing the work o the divingcontractor according to the contract. When the principal contractor appoints on-site represent-atives then such persons should have the necessary experience and knowledge to be competent

or this task.Te Worksite, Installation or Offshore Manager who is responsible or the area rom, which, ornear where, a diving project is being carried out on.Te Master o a vessel (or oating structure) rom which diving is to take place, who controlsthe vessel and who has overall responsibility or the sa ety o the vessel and all personnel on it.Any other person whose acts or omissions could adversely affect the health and sa ety o per-sons engaged in a diving project e.g. Port and Harbour Authorities, Other workscopes in the vicinity, Crane Operators and Maintenance Personnel etc, shall be controlled by procedures toensure that their tasks and how they undertake them do not affect the sa ety o the dive team.


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4 Pre-award activity

4.1 Project execution

On complex projects where multiple workscopes, other OGP members or multiple contractors areinvolved, a project execution plan should be produced declaring the processes and arrangements that will apply to that project. Te project execution plan is produced by the contractor or OGP member.It should include but not be limited to:

Project title

Description o the project including an outline o the workscope and resourcesProject organisationProject key personnel with roles and responsibilities

Lines o communication

Overview o contract arrangements

Deliverables and reporting requirementsCompetence assurance processes or individuals and contracted companies

Regulations, standards and codes to be employed

Control o work process

System or the management o changeDescription o the relevant Sa ety Management Systems ( s) and any inter acesRisk assessment procedures and the process or reporting sa ety, business, technical and envi-ronmental issuesSchedule o project risk assessments and sa ety reviewsAudit plans and verication processes or contractor management systems, vessels, plant and

equipmentProject plan/schedule with key dates and milestonesDene processHealth, sa ety and environmental plans, including leading and lagging indicators

Assurance plans

Emergency and contingency plans

Reporting and recording accidents and incidents

4.2 Third party operations

Tird parties working on behal o OGP members, or in areas where a member has a duty o care,have an impact on its operations and its reputation. It is essential that they per orm in a manner thatis consistent and compatible with the OGP members policies and business objectives. Tird partiesinclude but are not limited to:

Other OGP membersContractors and their subcontractors

Government organisationsTe military Environmental bodies

Ports, Harbour, Canals, River Boards / Authorities

Local community organisations


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4.3 Management audits

audits Te purpose o this section is to dene the expectations pertaining to auditing Sa ety ManagementSystems ( s) and inter acing with OGP members.

audit o ensure suitability o third parties to deliver all unctions sa ely, they should undergo an audit o

their .

alignment Holders o contracts should ensure that their aligns with the OGP members Health, Sa etyand Environment ( ) policies.

Site audits A requirement or site audits (pre-contract and post-contract award) to assure compliance withstated objectives should be incorporated in the project strategy plan.

For pre-award, the site audits should establish culture or consideration in tender award deci-sions.

Other site audits should be conducted i there is a perceived risk to delivery o the workscope.

4.4 Interfacing

Holders o contracts should undertake to clearly dene the inter aces between the contractors and the OGP member. Tis may be via a specic inter ace or bridging document to demonstrate

alignment.


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It is crucial that current international and local legislative standards are complied with in orderto ensure a uni orm approach to diving activities. Where conicts arise between international ornational requirements and this , the more stringent shall take precedence.

National National and regional regulatory requirements

International International Maritime Organisation IMO (including SOLAS, MARPOL etc )Port and ag states

Classication by societies who are members o IACS

Industry guidance International Marine Contractors Association ( IMCA) current Guidance and In ormationNotes, including those rom AODC and DMAC, are integral to this

OGP recommended practices and guidance Management Guidelines or working together in a contract en ironment (OGP report re -erence 291)

5 Compliance


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6.1 Planning

o provide the assurance that all elements within the planning phase o this process are ade-

quately addressed in a reasonable time rame, detailed planning is required. Tis will provide all parties involved with delivering the project a structured time line o deliverables, any specic initiatives or improvement programme resources (both personnel and equipment) and expectationsto work towards.

6.2 Communicate expectations

Te purpose o this guidance is to provide contractors with a clear outline understanding o theOGP members expectations. It is also intended to provide the contractors with an understanding oclients sa ety culture and o the attitudes they may expect rom the client.

Te list is neither exhaustive nor specic to any particular job. It may be added to, or updated,depending on new requirements or on the requirements o a particular worksite or project.

6 Planning

International &national regulations

Compliance Planning Execution Measuring &improving

OGP members'policies &

expectations

Contractors' policies,standards &procedures

Diving & subseaindustry standards

SMS interfacedocument

Planning

Communicationsexpectations

High level HAZID

Roles &responsibilities

Competenceassessment process

Audit plan

Information validation

Developing workscope

Engineering &procedure

development

Mobilisation/demobilisation

Risk assessment

Emergency responseplan

Management ofchange

Accident investigation& reporting

Notication

Bridging document

Site rules

Risk assessment

Safety briengs

Permit to workprocess

Health & medical

Care of theenvironment

Progress reporting

Close-out report &meeting

Lessons learnedfeedback


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6.3 Expectations

Te OGP member should expect the contractor to communicate and embed the ollowing expecta-

tions within their work orce and subcontractors associated with the work.Key Expectations Notes

Health, safetyand environment

Consistently emphasise that health, safety and environment comes first.

HSE ContractorsSMS to be in compliance with the clients.HSE p lan Contractors are to demonstrate that they have an active HSE plan in place that is directly

linked to theirSMS . The HSE plan must provide and demonstrate the method of capturingimprovements on a regular basis.

HSE performancereporting

The contractor is to measure and monitorHSE input and output performance (leadingand trailing indicators) and report on a regular basis based on the clients expectations.

Proactiveleadership

The contractor shall be fully committed to and demonstrate a proactive leadership inHSE behaviour and management.

HSE behaviours Communicate expectations regarding individualHSE behaviours and attitude.

Roles,responsibilitiesand authorities

Everyone should be aware of and understand their roles, responsibilities andauthorities.

Training Ensure that training is available for all essentialHSE skills.

Environment Encourage the efficient use of energy, the minimisation and management of waste andthe prevention of pollution.

Engagement andaccountability

The contractor shall clearly define expectations, commitments, roles and accountabilitiesfor all personnel, including all subcontractors and third-party companies.Contractors shall have clear and effective methods for engaging the whole workforce inall aspects of HSE management.Everyone has the obligation to stop work if they feel it is unsafe.Reinforce and demonstrateOGP members commitment and individual safetyaccountabilities.Encourage the reporting of unsafe acts and conditions, near misses, dangerousoccurrences and accidents.

Site standards Contractors shall have clear and highly visible site standards. All personnel are to befully knowledgeable of the site standards applicable to their work area.

Safety assurance Contractors shall have detailed assurance processes in place for all vessels andworksites. Client assurance processes will be applied to certain activities as appropriate(such as vessel and project preparation assurance).

Engineeringand procedureassurance andcompliance

The contractor shall apply rigorous assurance processes to all engineering andprocedural activities to ensure safe and effective implementation of workscopes. Asystematic procedure for the control of deviations from approved procedures whichincludes formal re-assessment of risk as an integral component, is required

Incident reporting The contractor is to ensure prompt reporting of all accidents, incidents or near-miss

events in compliance with clients expectations.Encourage the reporting of unsafe acts.


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6.4 HAZID

A should be completed shortly afer the work requirements and vessel have been identied.

Tis is not intended to replace or be used in conjunction with any o the standard process RAs.A small group that possess the range o experiences capable o understanding all aspects associated with the upcoming workscope should per orm the .

Te objectives o the are to:Stand apart rom the normal risk assessment processes in order to take a very high-level overview o the upcoming workscope and its associated management, inter aces, procedures andhardwareIdenti y any key or specic areas o risk that may not be covered, or may be covered inadequately,in the routine project risk assessment process (eg key changes, new equipment, new techniques, vessels or equipment with suspect history and outstanding restrictions, class notations or non

con ormancesetc )Generally provide a very open orum where any areas o concern can be highlighted, candidlydiscussed and nominated or urther detailed attention i necessary Specically dene requirements or specialist personnel ( eg vessel master, diving, , marine,lifing specialistsetc )Local area constraints

Adverse weather working It is not possible to control weather and other environmental conditions. Specic local conditionsmust be considered in design, engineering and operational activities, and contingency plans must bedeveloped in order to provide the best opportunity o completing the work sa ely and effectively.

Extreme environment and weather will ofen affect vessel productivity and can inuence personalsa ety. Te Vessel Master is always accountable or the sa ety o the vessel and all personnel onboardand, as such, or the decision to continue to remain on station, to stand by or to run or port.

In order to make decisions regarding per orming specic activities, it is important that these areassessed or weather criticality at the procedure design stage and risk assessed accordingly. An obvi-ous example o such activities is marine/subsea lifs. Tese should be assessed, sea states and requen-cies or their implementation calculated, and these considered in all stages o the risk assessment.

Contingency plans should be developed to allow work to proceed or to achieve completion or sa eabortion o a task should the weather change, e.g. it is ofen appropriate to use lif bags rather than a vessel crane to achieve a sa e subsea lif. Other actors may inuence the continuation o some activi-ties in adverse weather such as water on decks, ice, ability to launch s and diving bells.

iming o work activities should be planned around the weather. Sometimes it may be advantageousto wet store large items on the seabed during a good weather spell so that work can continue whenthe weather worsens.

It is not always poor weather which precludes work activity. Flaring rom a vessel can only take place when there is sufficient wind to blow the are clear o the vessel. Similarly, Installation gas detectorsmay be activated by diesel exhausts when vessels are working close alongside with no wind. Visual

survey is ofen stopped owing to poor subsea visibility. Some subsea current can improve thissituation.


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6.5 Roles & responsibilities

Te roles and responsibilities o all key personnel involved in the management and control o a diving

operation should be clearly dened.Key personnel include the ollowing. Tese key personnel and their responsibilities should bedeclared in the Project Bridging Document.

6.5.1 Contractor Personnel Contractors Project ManagerConstruction Manager/Superintendent

Contractors Project Worksite Representative

Vessel Master

Contractors Supervisor/s

6.5.2 Worksite Representative roles and responsibilities Te purpose o this section is to describe the responsibilities and duties o personnel representingOGP members in the sa e management o diving operations.

In general, Worksite Representatives are involved in assurance activities during normal operations.

Te contractor is responsible or per orming all elements o the work and the responsibilities o thecontractor should be such that, should a Worksite Representative not be present, the work is able to progress normally.

Roles and responsibilities are not written to establish demarcation lines between individuals, or todetract rom the collective responsibility o :

Te onshore/worksite management teamseamwork within OGP organistioneamwork within contractors

A competency assessment process must have been completed on all personnel who are allocatedresponsibilities and duties.

Te OGP member or its representatives will maintain training and competency records or person-nel that are used as offshore representatives.

Tere are a number o assurance activities at a diving operation worksite that may be allocated toOGP member-approved competent persons, depending on OGP member assessment o the needbased on risk and added value.

Te OGP Project Manager should nominate individuals to per orm one or more duties, dependenton the individuals competency.

Responsibilities and duties may be trans erred during the course o a project. Competency must beassured when trans erring responsibilities.

Where required, Worksite Representatives must also be in possession o the ollowing :Medical certicate

Survival certicate

PassportLetter o insurance liability (i appropriate) or recognised equivalents


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6.5.3 Worksite Representative duties Safety

Ensure that the contractor, his staff and his subcontractors have received adequate instruction, amiliarisation and training in OGP member requirements, national or applicable regulations, policies, procedures and any special or unusual hazardsEnsure contractor awareness, comprehension and compliance with:

International and local legislative requirementsOGP member policies, practices and proceduresContractor policies, practices and proceduresMarine proceduresField and approach chartsLocal rules

Emergency Procedures and preparednessBe knowledgeable o :

Worksite hazards, communications, local working practices, logistics and emergency proce-dures

Ensure contractor and worksite management have received and reviewed the workscope and the project bridging documentAll emergencies, accidents, incidents and uncontrolled events are reported and investigated asappropriate. Act as OGP member ocus during any emergency. Complete all necessary reports.

ContractualHave suitable amiliarity with the contract

Act as the ocal point or OGP member worksite activitiesIssue all ormal site instructions/directions to the contractor on behal o OGP memberEnsure contractor compliance with contract

Be responsible or any offshore contract administrationMonitor scope variations and cost control systemKeep a log o events, instructions and communications

Assurance

Te Worksite Representative must ensure that:Formal risk assessments have been conducted or each stage o the work, and the risk-reducing

measures identied in s and procedures are implemented be ore work tasks commenceManagement o change procedures are implemented

Necessary assurance activities are completed

Relevant certication has been audited and checked by an Independent Competent PersonBy regular monitoring o work activities, sa e diving, working practices including suitable rest periods are adhered to by the contractor in accordance with legislation, industry guidance andcontractors approved diving and other proceduresSa ety meetings are held on a regular basis over the duration o the programme, with a copy othe minutes passed to the OGP memberRegular worksite meetings are held with the contractor to address progress, planning and engi-neering issues


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OperationalEnsure works are per ormed in accordance with approved procedures

Ensure regular communication is maintained with key personel at worksite, installation, termi-nal, port, harbour, river, canal boards or authoritiesetc Adequate records and logs o events are maintained

Reporting o job progress and operational issues is made to the relevant personnel onshore andoffshoreFacilitate issue and acceptance o Permit to Work System

Competence

Te Worksite Representative must be assessed through a competence assessment process or the workscope/worksite and position as being competent in the ollowing areas:

Have a minimum o 2 years experience, pre erably 5 years, at an inshore/offshore worksite

Have attended ormal risk assessment training Have completed a OGP member permit to work courseHave competence and training in, where necessary, relevant OGP member and industry processes/practicesBe knowledgeable in the ollowing:

OGP member policies, practices and proceduresRelevant and appropriate discipline legislation and industry guidanceContract between OGP member and diving contractor

inter ace document (OGP member/contractor)Mechanical and physiological aspects o diving

6.6 Competence assessment process

During execution o the work, the OGP Member must monitor the continued competence o thecontractor. Tis re ers to any associated training commitment undertaken. Where necessary, thecompany should also determine i any additional competence assurance is needed as a result o localcircumstances. Monitoring should include a verication that the contractor complies with his man-agement system that may include:

Competence and close monitoring o the replacement o personnel

Provision o the necessary induction courses

raining o contractor personnel in job related activities and proceduresCompletion o all agreed upon training, including any specied statutory training require-mentsAvailability o documents, instruction and in ormation leaets with special attention touse o local language rein orced with simple visual messages


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Generic section

Previous inspections

Vessel particulars Certication, documentationCrew managementBridge, navigation and communications equipmentSa ety managementPollution preventionStructural conditionLi e-saving appliancesFire ghting Mooring

Machinery spaces and plant (including ballast systems)General appearance and condition (including accommodation, public rooms, galley)Hazards slips, trips and alls

Specialist vessel sections

Dynamic Positioning ( ) vessel supplementDiving vessel supplementRemotely Operated Vehicle ( ) vessel supplementHelicopter supplement

Tere are certain key components that the CMID does not contain. It is the responsibility o individ-ual OGP members to ensure that where these instances may occur, provision is made or additionalauditing with a contractual obligation or rectication included in the contract.

Specic client or project requirements are not addressed,1. eg specic manning requirements,topical surveys such as wire assurance or ladder surveys; these are addressed as part o the vesselassurance surveys.Te supplement covering specialist vessels is brie and covers only the salient marine points.2.Te helicopter section is brie and some items need to be checked more requently than the3.annual IMCA/ audit (eg helideck crew training and competence).Te CMID process audits the vessel against the requirements o Flag State or Class Society.4.For OGP members executing projects globally, the CMID may not cover sa ety critical equip-ment,eg cranes may be excluded rom Class, or may not be required to be under a certication

scheme.Summary

It used to be the unction o each companys marine department to audit every vessel. Tis systemhas been replaced by the present, widely accepted system.

Te document is very comprehensive and generally works well within the limitations noted above.However, the will need to capture those items not covered or covered to a lesser extent thanOGP member expectations.


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6.7.4 Vessel/worksite audit It is advisable that a sa ety audit should be conducted on vessels and worksites which are either newto OGP members or which have not been used or any signicant period.

Te ollowing is a list o subject prompts that may be used during an audit.

It should be noted that the intention o the vessel/worksite visit is to keep an open mind a strictchecklist approach may not be the most appropriate utilisation o the time available.

Personnel Onboard ( )/Worksite monitoring in port and quayside security Vessel/worksite induction system

Vessel/worksite sa ety booklet

Sa ety per ormance

Site standardsPersonal Protective Equipment ( )Permit to Work System

Electrical work and isolation procedures

Risk assessment and task risk assessmentsoolbox talks

inspectionsEmergency response training

Sa ety meetings inputs, outputs and incident reporting

Accident investigation

training Competence assurance

Hazard observation card observation system

Sa ety raining Observation Programme (S OP) and ime Out or Sa ety ( OFS) culture orsimilar processesCrane operations

Lifing operationsControl o substances hazardous to health or similar systemBurning gas storage

rip hazards and ankle snapper tour issues: general/manning levels/qualications

Deck manning level Waste management

Oil spill response

Personnel trans er

Sa ety around lines under tension


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6.7.5 Diving equipment systems audit Be ore being accepted as t or purpose, all diving plant and equipment used at an OGP memberscontract must have:

An IMCA Diving Equipment Systems Inspection Guidance Note (DESIGN) standard audit(usually sel -audited by the contractor). Four DESIGN documents are currently available:

DESIGN D023 Sur ace Orientated Diving SystemsDESIGN D024 Saturation Diving SystemsDESIGN D037 Sur ace Supplied Mixed-Gas Diving SystemsDESIGN D040 Mobile/Portable Sur ace Supplied Systems

A third-party approval o the DESIGN audit (within the previous 12 months or xed systems)and/or approval by an OGP member diving specialist. Additionally, operators may undertakespot, theme or ull audits at any time and the results o these should be considered.Diving systems must have been designed and built to an approved standard.

Saturation systems must be supported with a current Failure Mode Effect Analysis ( )document and all new diving systems shall be designed, abricated and maintained in class.

6.7.6 Project equipment and audits versus

is a requirement under class and is system ocussed as opposed to a ull which is subsystem ocussed and consequently more detailed. What an can there ore ail to identi y arespecic component interactions and their ailure modes/consequences, or example diving systems, power management systems, cranes J lay systems,etc .

Te expertise required to review and interpret the results o / s or vessel deploymentequipment and systems is not necessarily the same. ualied, competent auditors who have adetailed theoretical and practical experience base in the system being audited must be employed.

Failure Mode, Effects and Criticality Analysis

Where operations are planned that involve complex vessel systems it is recommended that an appropriate Failure Mode, Effects and Criticality Analysis ( ) is in place. Tis should either be con-ducted specically or the upcoming operations or a previously completed can be employedas long as it is care ully reviewed with ull respect to the proposed workscope.

Some vessel systems where a is likely to be appropriate are:Vertical and horizontal pipe or umbilical tensioner lay systems

Vessel Systems used or the deployment o divers. Note: diving operations should not be per-ormed rom a vessel that is not as a minimum IMO Class 2. For this class o vessel, a current,

Class approved with any ndings or issues closed is mandatory Subsea habitats

objectives

Te objective o the process is to identi y the possible consequences o any potential systemailure modes on:

Te sa ety o personnelAny environmental impact

Te potential or plant or equipment damage

Impact to the project programme

Whilst the sa ety o personnel is usually well catered or under the standard risk assessment proc-esses, it should be noted that an effective may actually remove potentially difficult repairactivities or identi y more suitable alternative courses o action should a ailure occur.


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benets

Te output rom the process provides practical engineering and planning support to pro- jected workscopes. As a minimum, it will sharpen the ocus on ailure criticality and improve the projects ability to plan appropriately and it is not unusual or a to signicantly change a projects contingency or spares policies.

Te key benets are:Improved operational awareness through identication o the most ailure critical aspects o the work programmeAccurate identication o programme contingency options and enhanced contingency plan-ning Improved and more ailure-specic spares management policy

The process

Te process can be carried out at system, subsystem or component level. Generally it isappropriate to go to subsystem and major component level or diving project activities due to vesselcosts and project impact.

s should be carried out as a ormalised process. An outline o this process is as ollows:Identi y the systems or subsystems involved

Identi y the ailure modes

Identi y the possible ailure causes (this may involve a review at component level)

Carry out probability and severity reviews (this may take the orm o discussion notes)

Using probability and severity ratings produce a criticality rating Develop mitigations as appropriate

Carry out the mitigation recommendations

Publish the results to ensure team awareness

6.7.7 systems audit

Tis audit document is based on the IMCA Standard Audit Document No IMCA R 006.

Te audit covers: s

ooling

Inter acing

All the support systems and the relevant procedural documentation

Te audit pro orma is typically passed to the contractor to complete in the rst instance. Te OGPmember auditor should review the contractors ndings and ocus on any areas requiring urtherattention.

6.8 Information validation

A system shall be in place to ensure that all in ormation on the worksite is current and valid. Keydocuments with the latest revisions should be listed in the bridging document or a re erenced docu-ment register.


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6.9 Workscope and procedures

Workscope must be clearly dened in order to acilitate timely preparation and issue o procedures.

Procedures should be written in compliance with the OGP member, the contractors and legislativeexpectations, policies and practices, and incorporate industry best practice.

Hold points should be included in procedures where there is a requirement or specic signedauthorisation or work to continue (eg completion o con erence toolbox talk, identication osubsea equipment, valves, anges etc and receipt o key documentation such as permits and isolationcerticatesetc ).

Te responsibility or the production and issue o competent procedures lies with the contractor.

Te schedule or procedure production shall allow or:Review and comment on draf prior to Stage 1 risk assessment

Final review, approval and issue or construction be ore work can commence

Development o lif plans and their review by OGP member mechanical handling and/ormarine engineering contractors be ore work can commence

6.10 Mobilisation/demobilisation planning

6.10.1 Mobilisation initiative A high proportion o incidents occur during mobilisation and demobilisation. Te ollowing recom-mendations are made:

Vessel/worksite assurance plans should be drawn up at an early stage to provide clear guidance1.on requirements.Sa ety awareness should be increased among personnel by ensuring that subcontractor compa-2.nies receive the clients sa ety expectations at an early stage.Increase efficiency o the mobilisation by assisting the provision o adequate and realistic3.in ormation to contractor personnel, subcontractors, marine and worksite personnel as earlyas practicable.Feed lessons learned rom previous projects into the project planning at an early stage and4.show personnel that their efforts and ideas are implemented.Provide personnel joining the vessel/worksite with a positive message by producing plans that5.have no surprises and that demonstrate that management has researched the project thor-oughly. Tis will give personnel a positive rame o mind in which to work that will naturally

ollow through to the offshore phase and to demob and will, through time, improve the cul-ture and behaviour o the personnel.Improve vessel/worksite access control and management. Tis is key to both security and, more6.importantly, provide a means o managing and tracking personnel in case o emergency.Improve subcontractor alignment and participation in mobilisation initiatives, preplanning7.meetings and sa ety expectations.Implement a robust lessons learned process within each contractor organisation.8.

reat mobilisations and demobs separately rom the main project activity with regard to sa ety9. per ormance and sa ety ocus.All contractor companies should emphasise their sa ety expectations to ALL parties (10. ie to

their work orce, their client and their subcontractors).


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6.10.2 Mobilisation planTe contractors process or managing mobilisations should be in place and open to audit.

Te plan should ensure that the mobilisation is carried out in a sa e, efficient and timely manner. Itinvolves a review o the workscope objectives ollowed by detailed engineering and logistics preplan-ning, complete with the accompanying risk assessments and assurance processes.

Te mobilisation plan will address such items as:Te project workscopePre-mobilisation meetings

Tird-party contractor audits

Site sa ety planning and auditing

Project plan review Designation o responsibilitiesTird-party contractor integration and management during the mobilisation

Vessel/worksite deck plans: proposed and nal

Detailed mobilisation schedule including the equipment mobilisation sequence and the supporting logistical requirementsManagement o change during the mobilisation

Communications during the mobilisation

Project and vessel/worksite inductions

Te onboard management o non-vessel personnelEmergency and contingency plans

Availability o all required documentation

Tere may be a requirement or a documented acceptance and sign-off process by the main contrac-tor, client and some o the third-party companies in the mobilisation.

6.11 Demobilisation plan

Te contractors process or managing demobilisations should be in place and open to audit.

Te plan should ensure that the demobilisation is carried out in a sa e, efficient and timely manner. Itinvolves engineering and logistics preplanning, complete with the accompanying risk assessments.

Te demobilisation plan will address such items as:Demobilisation meetings

Tird-party contractor audits

Site sa ety planning

Project plan review Designation o responsibilities

Tird-party contractor integration and management during the demobilisation

Vessel/worksite deck plans: current and nal

Detailed demobilisation schedule including the equipment demobilisation sequence and thesupporting logistical requirements

Management o change during the demobilisation

Communications during the demobilisation


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Vessel/worksite inductions

Te onboard management o non-vessel personnel

Emergency and contingency plans

Capturing o as-built and other key project deliverablesPer ormance data

Tere may be a requirement or a documented acceptance and sign off process by the main contrac-tor, client and some o the third-party companies during the demobilisation.

6.12 Risk assessment

6.12.1 Risk assessment requirements

ReasonsAll tasks should be subject to a risk assessment. Tis is to identi y the hazards present, assess the risksinvolved, and identi y the controls and precautions necessary to undertake these tasks sa ely.

Responsibility

Te diving contractor who is accountable or the work has the responsibility or the risk assessment.I , afer the initial risk assessment, the contractor is changed or any reason, then the new contractormust re-risk assess the work.

Personnel involved

Te risk assessment should be attended by any party whose acts or omissions could adversely affectthe:

Health and sa ety o persons engaged in the project

Environment

Contractors/companys assetsOperational/execution per ormance

It is essential that the necessary personnel are available or all phases o the risk assessment. As examples, this can include personnel rom the ollowing:

Operations, installation, worksite, area management with intimate local knowledge o themanagement and control systems which are to be utilised during the work Subcontractors ( eg commissioning, pumping, rock dumping, grouting, survey, dredging, crane,

haulage, securityetc

)Specialists ( eg marine, aviation, diving, lifingetc )Tird-party operators (including drill rigs, accommodation, other operators)

I the correct personnel are not present then the risk assessment should not go ahead. All personnel present should be competent in the area o expertise they are providing. All those involved in the riskassessment must contribute ully to the process.

Content of risk assessment

All aspects o the work including the mobilisation, demobilisation, onshore trials and transit to sitemust be risk assessed.

Some areas o the work may be covered by so-called generic procedures (eg laying concrete mats, water blastingetc ). Tese procedures must be examined as part o the overall risk assessment unlessit can be shown that they have been independently risk assessed.

I this is the case, the generic procedure and its associated independent risk assessment must be avail-able or review during the job-specic risk assessment. Te risk assessment team must ensure that the


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generic procedure is applicable to the work in hand and any variations are identied and included as part o the overall risk assessment.

Where the same activities have been carried out previously it is permissible to use previous riskassessments as guidance only.

Timing of risk assessment

Risk assessments should be carried out in good time. For normal planned operations the Stage 1risk assessment should be completed prior to the scheduled work. Tis allows time or the control/mitigating measures to be implemented. For more urgent work the timescale or the planning phasemay be much shorter. However, the risk assessment process must still proceed even i this meansdelaying implementation.

All procedures must be at least at the nal draf stage including internal and external checks priorto the Stage 1 risk assessment.

6.12.2 Risk assessment stages In the subsea sector the preliminary hazard risk assessment process comprises three phases orlevels:

Stage 1 Onshore Risk Assessment (sometimes known as a HIRA (Hazard Identication andRisk Assessment))

All activities covered by workscopes and generic and specic procedures must be subject to a ormalrisk assessment process during the onshore planning phase. Te process will identi y any require-ment to change the workscope and procedures and/or any mitigating measures to be applied. Te process shall be as dened in the diving contractors and will include active involvement romall parties whose acts or omissions could adversely affect the health and sa ety o persons engaged in

the project or could affect plant, equipment or the environment.Stage 2 Onsite Risk Assessment

Tese are carried out by personnel directly involved in the supervision o the work, whose acts oromissions could adversely affect the health o persons engaged on the project. As a minimum, theyshould review the onshore Stage 1 Risk Assessment, generic risk assessments and job sa ety analysesusing these as a starting point or the Stage 2 Risk Assessment. A Stage 2 Risk Assessment must beconducted or all elements o the project including routine maintenance activities.

Stage 3 Toolbox Talk

Tis is a review and discussion immediately prior to the work taking place. It will include a nalreview o the risks involved by all participants. An outline record o the toolbox talk, its outcomesand attendees should be made.Conference Toolbox Talk

Where the work involves a connected action between remote siteseg an Installation and a vessel (ie the Installation is involved with, has the ability to inuence or could be impacted by the activities), joint con erence toolbox talks involving key personnel at both locations shall be arranged be orethe commencement o each section o work.

Key personnel shall comprise those with responsibilities under the local Permit to Work System(P W) (ie Installation Area Authority and Vessel Per orming Authority) and those with directresponsibility or the work (eg Installation , Installation echnical Representative, Vessel ShifSupervisor, contractor Project Engineer, technical specialist).


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6.13 Emergency response plan

6.13.1 Emergency response guidelines Site specic contingency plans supported by risk assessments must be in place, or all oreseeableemergencies, to provide re erence to personnel that have responsibility or involvement in a diving project in the event o an emergency.

Examples that should be considered and, i required, extended:Recovery o an injured/unconscious diver rom working depth to a sa e place or treatment, andconsequential medical treatmentDecompression illness and the treatment o it

Hyperbaric Evacuation to a sa e re uge and decompression to sur aceDiving in contaminated waters

Recompression contingency arrangements where the primary site is compromised in an emer-

gency during sur ace supplied diving operationsMedical treatment acilities identied in remote areas

Contingency and response plans, together with callout procedures, should be exercised regularly byOGP members, the diving contractor, other operators and key parties.

6.14 Management of change

Tere must be a ormal, documented Management o Change ( ) process which is acceptableto the OGP member. Te Management o Change process will dene how change is implemented,

who is authorised to approve levels o change and how any appropriate risk-reducing measures areapplied. Te approval levels or shall be dened in the Project Bridging Document.

6.15 Accident investigation and reporting

An agreed system o accident, incident and near miss reporting must be implemented to ensure thatlegislative, OGP member and the contractors reporting requirements are met. All health, sa ety,technical integrity and environmental incidents including near misses shall be openly reported,investigated and documented in order to analyse and learn rom the incident. Te objective o suchreporting is to ascertain root causes and not to apportion blame.

Major incidents are to be investigated by a multi- unctional team with independent participationand leadership. An agreed suitable root cause investigation methodology should be utilised. Further-more, investigation updates, reports and action closeouts should be carried out in a timely ashion.

6.16 Notication

Good communications are key to conducting sa e diving operations. Key parties must be notiedand updated regularly as situations change. Notications may be in relation to sa ety, per ormance, progress, or engineering issues. Key parties include, but are not limited to:

Tose identied as key in the Project Strategy or Bridging Document

Single point accountability, ie project and single point authorities Worksite, and/or control rooms o Installations and other vessel offshore managersEmergency response centres

External authorities, ederations and other regulatory bodies

Onshore terminal control rooms


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6.17 Bridging document

No diving operation should commence until an authorised bridging document has been issued. Te

object o the Bridging Document is to link or bridge the management control processes o the OGPMember, Worksite, third parties where appropriate and the contractors sa ety management systems( s) to clari y the procedures and processes that will be adhered to at that worksite. It is theresponsibility o the contractor to produce the project bridging document.

A bridging document will be required to cover the whole o the work. Key personnel and responseorganisations should receive controlled copies.

Te contents o a bridging document should include, or re erence, but are not limited to the ollow-ing:

Project title and revision status

Circulation list and authorisation signatures

Project overview including dates and contract arrangementsIdentication o the relevant workscopes and procedures

Identication and allocation o key personnel roles and responsibilities

Communication contact numbers or key personnel and worksites

Management o change process, and identication o approval levels

Emergency and contingency procedures including clarication o primacy List o re erenced documentation including revision status

Work control system

Applicable permit to work system or the intended work

Combined marine operationsField logistics and supportHelicopter operations


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7.1 Site rules (worksite)

Site rules that dene the specic arrangements to manage and control diving operations sa ely shall

be in place or all worksites. Note 1: Site rules should not be con used with the contractors worksite Site Rules.

Note 2: Site rules may extend 500m fom some worksiteseg exclusion zones.

7.2 Risk assessment

Stage 1: Onshore Risk Assessment

Re er to Paragraph 6.12

Stage 2: Onsite Risk Assessments

Tese are carried out by personnel directly involved in the supervision o the work, whose acts oromissions could adversely affect the health o persons engaged on the project. As a minimum, theyshould review the onshore Stage 1 Risk Assessment, generic risk assessments and any other sa etyanalyses. A Stage 2 Risk Assessment must be conducted or all elements o the project includingroutine maintenance activities.

Stage 3: Toolbox Talk

Tis is a review and discussion immediately prior to the work taking place. It will include a nalreview o the risks involved by all participants. An outline record o the toolbox talk, its outcomesand attendees should be made.

Conference Toolbox Talks Where a task involves interaction between remote siteseg an Installation and a vessel, joint con er-ence toolbox talks involving key personnel at both locations, shall be arranged be ore the com-mencement o each section o work.

7.3 Safety briengs

Briengs on OGP member expectations, policies and practices are to be given to all personnelinvolved in the project, including marine crew and third parties. A system o general sa ety brie -ings, sa ety meetings and toolbox talks must be carried out and recorded. Appropriate site orienta-tion, induction and project-specic training including site rules and emergency procedures shall beundertaken to clari y roles, responsibilities and actions. All personnel should attend the briengsand training, and a register should be maintained.

7.4 Permit To Work process

A ormal permit to work system must be in place to manage diving operations, or example a permit-to-work system between the diving team, the Worksite/Installation Manager and/or the master.

Te system places responsibilities on key individuals involved in the diving operation, both on thecontrolling Worksite/Installation and on the contractors vessel or issue, compliance with, and clo-sure o the work control system.

7 Execution


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Te outputs shall cover the range o incidents ranging rom high, medium and low potential nearmisses, days away rom work cases, recordable injuries, and rst aid cases (these input/output examples are not exhaustive other measures may be added as required by project requirements).

7.8.2 Health, safety and en ironmental performance monitoring and reporting OGP members have an interest in the sa ety per ormance o vessels and contractors that are used (orlikely to be used) on their contracts both whilst they are actually engaged in work or while per orm-ing work or other operators.

Tis paragraph suggests expectations on monitoring, reporting and reviewing o health, sa ety andenvironmental measures associated with contractor companies and their associated operations.

Measures are described as input measures (also known as leading indicators) when actions are proactive in nature in an effort to prevent the occurrence o incidents. Measures are also describedas output measures (or also known as lagging indicators) when they are used to report incidents

that have occurred.Te process o monitoring and reporting should meet the ollowing key objectives:

Provide timely ocus on measures in order to enable rapid and direct inuence on the activitiesconcernedIdenti y trends in order to determine whether any intervention or changes should be intro-duced by the contractor or by OGP membersProvide records o per ormance which may assist in establishing goals or uture per orm-anceOGP members must have a system to noti y, investigate, record and report incidents and alsoto eedback to OGP

7.8.3 Incident management When incidents occur it is important that they are managed in a consistent manner. Tis sectionsuggests a process or the management o incidents involving diving contractors whether they occuron contractor or OGP member managed sites. Te process and expectations also apply to contrac-tors contracted by third parties when they are working on equipment and in areas controlled by theOGP member (ie within OGP member sphere o inuence).

Additionally, and in the interests o shared learning and continuous improvement, contractors areexpected to advise OGP members o any signicant incidents that occur on any o their operationsand to ollow this up with sa ety ashes, investigation reports and lessons learned as they becomeavailable.

Te objective or the incident management process is to ensure the ollowing:Care, treatment and rehabilitation o any injured parties

A rapid communication o the incident to all interested parties

Reporting o the incident to relevant authorities i necessary

Clear denition o accountability or incident investigation and reporting imely investigation o the incident to establish root causes and evaluate actions to prevent

recurrenceimely restart o work

Evaluation and distribution o lessons learnedConsistent recording and tracking o incident details and actions


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8 Measuring and improving

8.1 Closeout report guidance

A closeout meeting should take place as soon as possible (pre erably within 2 weeks) afer demobili-

sation, or or extended operations, at regular intervals (not greater than 3 months).Te agenda should include but not be limited to:

Review o events

Closeout o any accidents, incidents and near misses

Recommendations or corrective actions

Conrmation o project nal statusConrmation o the provision o as-built and closeout documentation

Lessons learned

Any other business


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Appendix 1 Atmospheric diving suit

Title Atmospheric Diving Suit ADS

Definition A tethered one man submersible in which the operators arms or arms and legs, move insidearticulated joints to provide the effort to carry out the underwater taskAs the operator is not subject to a pressure greater than 100 millibars above atmosphericpressure, this is technique classed as Manned Intervention

Scope Use of ADS suits avoids the need for decompression to atmospheric pressure at the end ofeach diving operation. ADS systems have worked in depths >300mswThere are a variety of ADS systems, with no one being described as typical

Minimumteam size andcompetence

Team size subject to formal risk assessment. There must be sufficient number of competentand, where appropriate, qualified personnel to operate all the diving plant and to providesupport functions to the dive team. This may require additional deck support personnel andother management or associated technical support personnel, for example engineers orvessel maintenance technicians (Refer toAODC 022)

Equipment The contractor must be satisfied that sufficient plant, suitable for the use to which it willbe put, is provided for the diving project and that sufficient plant is available, wheneverneeded, which is suitable to carry out safely any action which may need to be taken ina reasonably foreseeable emergencyRefer to AODC 022

Operationalfactors

Deployment vessel or sufficient lay-down area on rig or platformTeam size smaller than saturation dive teamsNo decompression penaltiesSlow operational productive work rateAgility limited in congested subsea areasCan become fouled or damage subsea infrastructureRequires high maintenanceDeployment and recovery limited by environmental forces

Emergency &contingency

Problems with surface deployment vessel, rig or platformMay require additional surface vessel to provide emergency supportMajor problems with deployment unit while ADS in waterUmbilical severance or entanglementOnboard fire or flooding

Stuck in soft seabed conditions

Need for independent on-board life support servicesNeed for two operational ADS working at all times, one to assist otherHigh emphasis on back-up and redundancy


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Title Inshore/Inland DivingDefinition Inside territorial waters (normally within 12 miles or 19.25 kilometres from shore), including

docks, harbours, canals, culverts, rivers, estuaries, lakes, reservoirs, dams, flooded tunnelsand tanks.

Scope The preferred method of diving on Inshore/Inland Diving Operations is using SurfaceSupplied Air orNITROX The diving technique to be used should be defined through risk assessment


Minimum of 5 (Diving Supervisor, working diver, stand-by diver, tender for workingdiver, tender for stand-by diver)Team size subject to formal risk assessment. There must be sufficient number ofcompetent and, where appropriate, qualified personnel to operate all the diving plantand to provide support functions to the dive team. This may require additional supportpersonnel and other management or associated technical support personnel, forexample project engineers or maintenance technicians. The Diving Supervisor shall becompetent for the task and be in possession of a letter of appointment from the divingcontractor

Equipment Diving contractor must be satisfied that sufficient plant, suitable for the use to which

it will be put, is provided for the diving project and that sufficient plant is available,whenever needed, which is suitable to carry out safely any action which may need tobe taken in a reasonably foreseeable emergency. Equipment should conform to IMCA D018 and the appropriate sections of IMCA DESIGN 023 or IMCA D040.Proximity to a Recompression Chamber based on Table 1. The Chamber should conformto the standards contained in IMCA DESIGN D023

Operationalfactors

Compliance with local port, harbour and other local regulationsLocal environmental conditions eg current, tides, restricted surface visibility, surfaceconditions, sun, temperature (hot & cold), wind-chillS IMO PS eg surface craft movements, managing general public, neighbouringoperationsDiving at altitudes requires compliance with special diving tablesDiver Safe Access and EgressMaximum Bottom times based on Table 2

Emergency &contingency Remoteness of worksite and access to emergency services may require a higher degree

of medical competence and equipment to be immediately available at siteRecovering an injured/unconscious diver from working depth to safe place for treatment,and consequential treatment, including possible recompression requires a detailed sitespecific plan

Table 1 Proximity to a Recompression Chamber

Te diving contractor has responsibility to ensure the provision o acilities so that a diver can berecompressed in an emergency, should this be necessary. reatment o a in a compression cham-ber should commence as soon as possible and the sa est option is to have a Recompression Chamberlocated as near as practicable to the diving site.

Decompressionpenalties

Depth

Chamber requirement Travelling distancefrom the dive siteFeet Metres

No plannedin-water

decompression0 33 0 10

Diving contractor should identify thenearest suitable operational two-person,two-compartment chamber. Under nocircumstances, should this be more than

2hrs

All diving 33 165 10 50

A suitable, operational, two-person, two-compartment chamber should be provided forimmediate use at the site of the diving project.Additional DDC /s maybe required wheretreating a DCI incident may stop divingoperations if only one DDC is available

Immediatelyavailable on site

Appendix 3 Inshore/inland diving


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Title Live-boatingDefinition Term applied to supporting diving operations from a non-DP 2 or 3 class vessel while the

vessel is underway. However this also includes diving from aDP vessel on auto track

Scope There are unlikely to be any circumstances where anROV could not be deployed, a 4-pointvessel moored, or a DP 2 or 3 class vessel used.

Live-boating is considered an unsafe working practice andnot recommended within the scope of thisRP


N/A

Equipment N/A

Operationalfactors

High dependency on communication between dive team and Master to maintain vesselin a safe position relative to the diver at all timesNormal practice is for divers to access water by jumping, and egress through ascent ofa diving ladderPotential for divers umbilical to become fouled in propellers or intakes

No subsea refuge immediately available for diver eg basket or stageDeployment of stand-by diver delayed until propellers stop turningRecovery of an injured/unconscious diver to surface delayed, and the subsequenttreatmentEnvironmental forces changingRestricted to daylight hours and good surface visibility

Emergency &contingency N/A

Appendix 4 Live boating


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Title Mobile/portable surface supplied systems orSCUBA replacement Definition Mobile or portable surface supplied diving system which aims to provide the flexibility of

SCUBA without the safety limitations. The system may be moved to different locations on aninstallation or mounted on a small boat operating from a support vessel.

Scope Used for shallow water air or NITROX diving at depths less than 30msw (100fsw). It could beused up to a maximum of 50msw (165fsw), but only in exceptional circumstances and aftercareful risk assessment.


Minimum of 5 (Diving Supervisor, working diver, stand-by diver, tender for workingdiver, tender for stand-by diver)Team size subject to formal risk assessment. There must be sufficient number ofcompetent and, where appropriate, qualified personnel to operate all the diving plantand to provide support functions to the dive team. This may require additional decksupport personnel and other management or associated technical support personnel, forexample project engineers or vessel maintenance technicians

Equipment Diving contractor must be satisfied that sufficient plant, suitable for the use to whichit will be put, is provided for the diving project and that sufficient plant is available,whenever needed, which is suitable to carry out safely any action which may need tobe taken in a reasonably foreseeable emergencySufficient POB /living requirements when using a Mother vesselSuitable deployment crane(s) and adequate deck space required when using a MothervesselTwo suitable surface craft (daughter craft)Decompression chamber(s)Audit to IMCA DESIGN D040 Mobile/Portable Surface Supplied Systems

Operationalfactors

Size of mother vessel with POB /living requirements and deck spaceSafe launch and recovery limitations of daughter craftsMan-riding cranes and crane drivers maybe requiredTravel time between mother and daughter craft to be less than


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Title Observation divingDefinition Using a submersible decompression chamber (SDC ) as an observation chamber when the

internal pressure is at atmospheric pressure and external pressure ambient

Scope Perform subsea inspections without need for decompression after diveMinimumteam size andcompetence

Team size subject to formal risk assessment. There must be sufficient number of competentand, where appropriate, qualified personnel to operate all the diving plant and to providesupport functions to the dive team. This may require additional deck support personneland other management or associated technical support personnel, for example projectengineers or vessel maintenance technicians

Equipment Diving contractor must be satisfied that sufficient plant, suitable for the use to whichit will be put, is provided for the diving project and that sufficient plant is available,whenever needed, which is suitable to carry out safely any action which may need tobe taken in a reasonably foreseeable emergencyIMCA D024 Diving Equipment Systems Inspection Guidance Note for SaturationDiving Systems (Bell) relevant sections

Operational

factors

Chamber and ports certified for external working pressure at depth

Very limited viewing, mobility and agility at depth if using a diving bell

Possible requirement to cross-haul bell using certified man-riding system


Secondary method of recovery to surface and deck, and exercisedNeed to consider and plan for locating and recovering to surface, the observationchamber within the period of its on-board independent emergency life support systems

Appendix 6 Observation diving


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Title Remotely Operated Vehicles ROV sDefinition Unmanned vehicles covering a wide range of equipment, with no one vehicle being

described as typical.

Scope Working depths and radius vary, ROV classification are:Class I Observation ROV used for diver observation and inspection tasks, fitted withcamera/lights and sonar.Class II Observation ROV with Payload OptionClass III Workclass ROVClass IV Towed and Bottom Crawling VehiclesClass V Prototype or Development Vehicles


Subject to Class of vehicle, and 12 or 24 hr operationTeam size subject to formal risk assessment. There must be sufficient number ofcompetent and, where appropriate, qualified personnel to operate all the diving plantand to provide support functions to the dive team. This may require additional decksupport personnel and other management or associated technical support personnel, forexample project engineers or vessel maintenance technicians

IMCA

Competence Assessment ProcessEquipment IMCA R006 Standard ROV Audit Document needs modifying to suit Class and model of

ROV

Tether management systems

Operationalfactors

Need to integrate with Dive Control and Bridge for S IMO PSSmall vehicles = limited power weight ratio, affected by environmental forcesLarge vehicles may require own power generation units to guarantee supply and preventspikes from use of onboard suppliesPotential to become fouled in vessel thrusters recommend use of tether managementsystemsMoon-pool deployment/recovery preferred. Overside subject to environmentalconditions


Procedure for dead vehicle or vessel

Appendix 7 s


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Title Saturation Diving Sat DivingDefinition The practice where divers reach a full saturation state for the pressure and breathing

mixture being used. When this state has been reached the time required for decompressionis the same no matter how long they remain saturated.A closed diving bell is used to transfer divers under pressure to and from the worksite.Breathing medium is generallyHELIOX, although shallow air saturation dives are carried outoccasionally.

Scope HELIOX saturation starts 20msw and can be used to >600msw depending on divingcontractors procedures and medically approved tables


Absolute minimum team size is nine: two Diving Supervisors, one Life SupportSupervisor, 1 Life Support Technician, two divers, two stand-by divers on the surface thatare saturation qualified, and a dive technicianTeam size subject to formal risk assessment. There must be sufficient number ofcompetent and, where appropriate, qualified personnel to operate all the diving plantand to provide support functions to the dive team. This may require additional decksupport personnel and other management or associated technical support personnel, forexample project engineers or vessel maintenance technicians

Specialist divers

eg welder divers, inspector diversetc Equipment The diving system and the HRS must be under Class and free of all outstanding notations

Diving contractor must be satisfied that sufficient plant, suitable for the use to whichit will be put, is provided for the diving project and that sufficient plant is available,whenever needed, which is suitable to carry out safely any action which may need tobe taken in a reasonably foreseeable emergencyThe diving system is to be audited against IMCA DESIGN D024 Saturation DivingSystemsPower for launching systems used for hyperbaric evacuation must be independent ofships supply and must be either gravity or stored mechanical energyTowing/reception vessel to support hyperbaric evacuationLife support package for hyperbaric rescue systemReception location to complete decompression and surface intervalMedical equipment held on site which includes that of a minimum specification that iscapable of measuring: blood pressure, temperature, heart rhythm, and SPO2, and able

to transmit this information from the inside of the chamber to a doctor remote from theworksite, such that the information can be viewed in real time.Any SDC to contain equipment that can measure hydrocarbon contamination of anequivalent or greater Specification to the Analox Hypergas 2. This equipment to becapable of alarming and notifying both the Surface Diving Supervisor and theSDC inhabitants of contamination of the breathing atmosphere.

Operationalfactors

Suitable vessel for the workscopeSuitable saturation diving system for the workscopeRemoteness of worksite and access to suitable emergency rescue supportMinimum HeO 2 & O2 gas storage levels below which diving stops IMCA / AODC 14IMCA D014 ICOP


Depending on remoteness of worksite and availability of suitable emergency rescuesupport, consider option of on-board ROV interventionHyperbaric evacuation of all chamber occupants to a safe refuge and decompression tosurface within defined life supporting threshold limits

Appendix 8 Saturation diving


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Title Self-contained Underwater Breathing Apparatus SCUBA

Definition Diving equipment where the supply of breathing air is carried by the diver, making himindependent of any other source.There are unlikely to be any circumstances where surface supplied equipment cannot beused

SCUBA diving is considered an unsafe working practice and outside its use in Scientific and Archaeological Diving (appendix 14); not recommended within the scope of thisRP

Scope Refer toIMCA Guidance D033 Limitations in the Use ofSCUBA

Depthlimitation N/A


N/A

Equipment N/A

Operational

factors

No communications unless fitted with full face mask, hard wire or through water

communications unitsWithout communications unable to:Request assistanceDirect crane operationsActivate/de-activate underwater toolsPerform real-time video/verbal inspections

Cylinder sizes and working pressure varyLimited volume of available breathing airPotential to hold-breath to conserve airLimited depth/bottom timeReliance upon diver monitoring own depth and time to working out own decompressionscheduleRequires diver to hold a regulator between teeth (normally)Requires diver to use of half-mask (normally)Higher risks if used at night, limited to daylight hoursPoor underwater visibility and currents lead to potential disorientation

Need to have a tended lifeline

Emergency &contingency N/A

Appendix 9 Sel -contained underwater breathingapparatus


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Title Surface Supplied Air orNITROX DivingDefinition Surface supplied diving not using a closed bell. Carried out outside the territorial waters of

most countries (normally 12 miles or 19.25 kilometres from shore) or inside territorial waterswhere offshore diving, normally in support of the oil and gas industry, is being carried out.Specifically excluded are diving operations being conducted in support of civil, inland,inshore or harbour works or in any case where operations are not conducted from anoffshore structure, vessel or barge normally associated with offshore oil and gas industryactivities. (See Appendix 3)

Scope Maximum depth 50mswMinimumteam size andcompetence

Minimum team of 5 (Diving Supervisor, working diver, stand-by diver, tender for workingdiver, tender for stand-by diver)One tender for each diver tended from the surface. For umbilicals tended from a basketor wet-bell, one tender for every two divers in the waterOne stand-by diver for every two divers in the waterTeam size subject to formal risk assessment. There must be sufficient number ofcompetent and, where appropriate, qualified personnel to operate all the diving plantand to provide support functions to the dive team. This may require additional deck

support personnel and other management or associated technical support personnel, forexample project engineers or vessel maintenance technicians.Diving Supervisors and Divers may need additional training before using mixes otherthan airThe controls of a decompression chamber should only be operated by personscompetent to do so. The degree of supervision provided should reflect the experience ofthe operator

Equipment The diving contractor must be satisfied that sufficient plant, suitable for the use to whichit will be put, is provided for the diving project and that sufficient plant is available,whenever needed, which is suitable to carry out safely any action which may need tobe taken in a reasonably foreseeable emergencyThe diving system is to be audited against IMCA DESIGN D023 Surface OrientatedDiving SystemsDecompression chambers offshore one as a minimum. Additional DDC /s mayberequired where treating a DCI incident may stop diving operations if only oneDDC is

availableSufficient quantities of air/ NITROX must be available for two emergency dives to fullintended diving depth as a reserveSufficient quantities of air must be available to pressurise both of the deckdecompression chamber to the maximum possible treatment depth plus sufficient air forthree complete surface decompression cyclesNinety 90m 3 (3200 ft3) of breathing quality oxygen must be available for emergencytreatment proceduresLaunch and recovery of Diver and Stand-by Diver must be risk assessed:

Ladders should not be the primary means of exit from the water if the deck is morethan 2 metres above the water surfaceWhen used, ladders should extend at least 2 metres below the water and havesufficient hand holds above water to allow the diver to step easily onto the deckDiving baskets are recommended for all diving and must be equipped to IMCA standardsLifting plant and equipment must be certified man-riding

Operationalfactors

Limited to 50mswMaintain PPO 2 below 1.5 bar when using NITROXDivers not jumping into the waterUmbilical management to restrict divers accessing identified hazardsMaximum bottom time limitations (refer to Table 2)Decompression method (in-water vs surface) selected with due regard to operationalenvironmentIMCA D014 ICOP


Recovery of an injured/unconscious diver from working depth to a safe place fortreatment, and the consequential treatmentSecondary recovery of diver deployment and recovery systemEmergency evacuation to a safe refuge from DDC in a vessel/worksite abandonmentscenarioHeO 2 therapeutic breathing mixtures maybe required to treat someDCI incidents

Remoteness of worksite may, through risk assessment:

Identify the need for additional qualified Diver Medical Technicians within the diveteamIncreased level of medical equipment to be held at the worksite

Appendix 10 Sur ace supplied offshore diving air/


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Table 2 Maximum bottom times

Maximum bottom time limitations or sur ace decompression (SD), in-water decompression and

trans er under pressure ( UP) decompression diving Depth Bottom Times Limits (minutes)

Metres Feet TUP SD and in water

0-12 0-40 240 240

15 50 240 180

18 60 180 120

21 70 180 90

24 80 180 70

27 90 130 60

30 100 110 50

33 110 95 4036 120 85 35

39 130 75 30

42 140 65 30

45 150 60 25

48 160 55 25

51 170 50 20

Bottom time is the total elapsed time from when the diver is first exposed to a pressure great

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