Pre Mob Checklist

Mobilisation Checklist for

Offshore Survey Operations

IMCA S 016

International Marine

Contractors Association

www.imca-int.com

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The International Marine Contractors Association

(IMCA) is the international trade association

representing offshore, marine and underwater

engineering companies.

IMCA promotes improvements in quality, health, safety, environmental and technical standards through the publication of information notes, codes of practice and by other appropriate means.

Members are self-regulating through the adoption of IMCA guidelines as appropriate. They commit to act as responsible members by following relevant guidelines and being willing to be audited against compliance with them by their clients.

There are two core activities that relate to all members:

 Competence & Training

 Safety, Environment & Legislation

The Association is organised through four distinct divisions, each covering a specific area of members’ interests: Diving, Marine, Offshore Survey, Remote Systems & ROV.

There are also five regional sections which facilitate work on issues affecting members in their local geographic area – Asia-Pacific, Central & North America, Europe & Africa, Middle East & India and South America.

IMCA S 016

www.imca-int.com/survey

The information contained herein is given for guidance only and endeavours to reflect best industry practice. For the avoidance of doubt no legal liability shall attach to any guidance and/or recommendation and/or statement herein contained.

Mobilisation Checklist for Offshore Survey Operations

Introduction ... 1

1

Checklist Details ... 3

2

Personnel ... 4

2.2 IMCA Competence Guidelines ... 4

2.3 Personnel – Comments ... 4

3

HSE ... 5

3.1 PPE ... 5

3.2 Housekeeping ... 5

3.3 Safety Procedures, Precautions and Practices ... 5

3.4 HSE – Comments ... 5

4

Scope for Minimal Checklist ... 6

4.1 Specified Survey Systems ... 6

4.2 Online and Offline Survey Computer Systems ... 6

4.3 Field Background Data ... 6

4.4 Positioning Systems ... 6

4.5 Acoustics ... 6

4.6 Procedures and Specifications ... 6

4.7 Reporting and Charts ... 6

4.8 Scope for Minimal Checklist – Comments ... 6

5

Survey Systems ... 7

5.1 Online Computer Systems... 7

5.2 Offline Computer Systems... 7

5.3 Communications ... 7

5.4 Surface Positioning Systems and Vessel Survey Sensors ... 8

5.5 Subsurface Positioning – USBL... 8

5.6 Subsurface Positioning – LBL ... 8

5.7 Offsets and GPR Calibrations ... 9

5.8 ROV System Sensors Checklist ... 9

5.9 Survey System Comments ... 9

6

Procedures and Reporting ... 10

6.1 Procedures ... 10

6.2 Log and Record Keeping ... 10

6.3 Reporting ... 10

6.4 Procedures and Reporting – Comments ... 10

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Introduction

Aim

This document is a mobilisation checklist for offshore survey operations, for example, a pipeline survey by an ROV.

Survey contractors, ROV contractors, pipeline installation contractors and clients have a variety of in-house checklists. This document seeks to provide a standard framework for such a checklist. The intent is that it can be used by the contractors themselves and presented to a client or used by the client acting separately. In both cases it seeks to improve efficiency:

 It should act as a prompt to ensure the equipment, personnel and procedures are fit for purpose, able to do the work and ready to deliver the contemplated operation to the satisfaction of all parties;

 It should act as a catalyst towards a ‘no surprises situation’. Surprises usually mean delays in mobilisation which can be expensive for all parties;

 It should help to deliver safe and efficient operations.

Framework

The document provides a framework to build either a brief or detailed mobilisation checklist for survey support operations. The document could be expanded to cover any offshore survey operation; the extent of the checklist developed depends on the complexity of the survey operations which could include:

 Pipeline/subsea architecture condition surveys;

 Pipeline/subsea architecture post installation surveys;

 Pipeline/subsea architecture installation support observations (and installation/construction support).

For specific LBL acoustic and INS operations additional information may be required to reflect specific technical requirements and survey specifications.

The person completing the checklist may require access to the complete scope of work, survey specification, tolerances and procedural documentation required by the survey team to perform the tasks required.

The comments sections – 2.3, 3.4, 4.8, 5.9 and 6.4 – can be used for additional comments or observations not covered by the checklists.

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Glossary

CD Compact disc

CTD Conductivity, temperature and depth DPO Dynamic positioning system operator DVD Digital versatile disc

GPR Ground penetrating radar HSE Health & Safety Executive (UK) INS Inertial navigation system LBL Long baseline

MRU Motion reference unit

PPE Personal protective equipment QC Quality control

ROV Remotely operated vehicle SIMOPS Simultaneous operations UPS Uninterruptible power supply USBL Ultra-short baseline

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1 Checklist Details

Survey Party Chief:

Survey Procedure:

Survey Scope of Work (Tasks):

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2 Personnel

Description Yes No Remarks/Signature 2.1 Survey Personnel

Is there sufficient survey crew onboard to perform the survey tasks according to project procedures and specifications Are all survey crew trained and

familiarised with the onboard survey operation

Is the experience level of the survey crew sufficient to meet the job requirements

2.2 IMCA Competence Guidelines

Is there an appropriate way for

personnel to demonstrate competence, for example, a company scheme based upon the IMCA competence guidelines (IMCA C 004 – Guidance document and

competence tables: Offshore Survey Division)

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3 HSE

Description Yes No Remarks/Signature 3.1 PPE

Is PPE appropriate, available and worn by survey crew as a matter of practice

3.2 Housekeeping – is the general housekeeping in good order

At online and offline survey stations At survey stores and spares

Are all standard templates (e.g. survey/ dive log) onboard

3.3 Safety Procedures, Precautions and Practices

Is there existing evidence that risk assessments are being actively

undertaken as a normal practice by the survey team

Is there existing evidence that toolbox talks are being actively undertaken as a normal practice by the survey team Have all survey crew been given a vessel and project induction

Are the survey crew aware of the electrical isolation procedure and process used onboard

Are adequate and appropriate precautions taken when working at height (e.g. installing antennas on mast) Do the survey crew carry out manual handling assessments where relevant Does the survey crew participate in incident reporting and investigations Are the survey crew familiar with the permit-to-work system and any site standards

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4 Scope for Minimal Checklist

Where only a minimal checklist is required, the HSE section (section 3) can be completed and the following technical items checked. Any technical concerns should be discussed between the survey party chief and the relevant client representatives and appropriate sections of the more detailed checklists in sections 5 and 6 completed where relevant.

Description Yes No Remarks/Signature 4.1 Specified Survey Systems

Are all survey systems installed, interfaced and calibrated Is the accuracy of the survey

instrumentation onboard sufficient to meet the project specifications Is all hardware and software, including sufficient spares, onboard to perform the scope of work

4.2 Online and Offline Survey Computer Systems

Are online and offline survey computer systems installed and operational

4.3 Field Background Data

Are field background data as well as any proposed route(s) confirmed to be latest version

4.4 Positioning Systems

Are surface positioning systems checked/calibrated

4.5 Acoustics

Is there an acoustic management plan in place covering any issues such as seabed array planning, SIMOPS

4.6 Procedures and Specifications

Are survey procedures and

specifications in place and are survey crew briefed

4.7 Reporting and Charts

Are survey reporting requirements, digital data delivery and chart formats agreed

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5 Survey Systems

Description Yes No Remarks/Signature 5.1 Online Computer Systems

Latest software updates and licenses installed and tested

Data logging and (digital) video recording set up and tested

Latest field background and proposed route(s) available

Helmsman displays and spare computer systems and monitors available

Runline computations tested Geodetic parameters checked Peripheral equipment such as printer/ copier/scanner with consumables available and functional

Clean power supply available and functional

UPS systems tested

All equipment and cables secure Job parameters stored and hard copies filed

5.2 Offline Computer Systems

Latest software updates and licenses installed and tested

Spare computer systems and monitors and storage devices available

Printer copier/scanner, plotter, tape drive, etc. available with consumables (cartridges, CD/DVDs, tapes, etc.) Example deliverables available for approval

Data storage and backup facilities function tested

5.3 Communications

Communication protocol and emergency response understood Full duplex communication system operational for survey/bridge/ROV, etc. Helmsman displays set up for bridge/ DPO/ROV, etc.

VHF communications operational (e.g. bridge/deck/ROV/survey)

Telephone installed and working at survey desk

Data telemetry to/from other vessel, if required

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Description Yes No Remarks/Signature

Video telemetry to/from other vessel, if required

5.4 Surface Positioning Systems and Vessel Survey Sensors

Surface positioning systems fully functional and operating per specifications

Antenna/dome locations checked for masking and multipath effects

Antenna offsets measured and checked Interfacing to online system tested Positioning comparisons and QC checks performed

Most recent installation and health check reports available onboard (dates)

5.5 Subsurface Positioning – USBL

USBL system meets project specifications

Transponders (/responder(s)) and charger checked

Code frequency management in place Depth rating of transponders suitable USBL hydrophone XYZ offsets measured and checked

Most recent installation and calibration report available onboard (date) Transponder deployment method evaluated and approved

GPR sensor(s) interfaced to USBL system

Full calibration required or position check only

5.6 Subsurface Positioning – LBL

LBL system meets the project specifications

Array layouts agreed/as per survey procedure

Depth rating transponders and collars suitable for working area

Transponder deployment method evaluated and approved

LBL system function tested, including interface to vessel survey sensors Transponder status checked and correctly configured (e.g. battery status, code settings, etc.)

Anodes, shackles, collars, roping, etc. checked on transponders

LBL software and calibration package tested and interfaced to online system

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Description Yes No Remarks/Signature

LBL installation aids (e.g. frames/gravel bags/rope/shackles/acoustic/hydrostatic releases) onboard

5.7 Offsets and GPR Calibrations

Vessel/ROV/structure sensor XYZ offsets measured and checked

Vessel/ROV/structure gyro calibrations completed and comparisons logged Latitude and speed settings for gyros correct

Ongoing daily gyrocompass

comparisons planned and documented Gyros and MRUs operational and with valid calibrations

All XYZ vessel/ROV/structure offsets and corrections entered and verified in the online computer systems

5.8 ROV System Sensors Checklist – ROV system/sensors interfaced/checked (include additional systems/sensors as required);

tick off as appropriate

 Altimeter

 Depth sensor

 Swathe profilers/multi-beam

 Doppler velocity log

 INS

 Sound velocity meter

 Gyro, pitch, roll sensor

 Current meter

 Pipe/cable tracker

 Video overlay

 

Depth rating ROV survey sensors suitable for working area

Calibration certificates valid for depth sensors and sound velocity/CTD probes

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6 Procedures and Reporting

Description Yes No Remarks/Signature 6.1 Procedures

Relevant procedures and drawings available to survey team

Equipment operating procedures and manuals available

Management of change system in place and understood

All survey team briefed and aware of work scope

Target and route coordinated available and checked

6.2 Log and Record Keeping

Detailed survey log maintained All results independently checked and signed

Filing system set up for results and calibrations

Mobilisation and calibration report prepared

6.3 Reporting

Project reporting requirements understood

Chart formats and content agreed Provisional reporting and chart schedule for checking/review

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7 References and Further Reading

 IMCA C 004 – Guidance document and competence tables: Offshore Survey Division

 IMCA M 149 – Common Marine Inspection Document

 IMCA M 189/IMCA S 004 – Marine inspection checklist for small workboats

 IMCA M 204 – Vessel assurance

 IMCA M 205 – Guidance on operational communications