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    Manufacturer: Witherbys

    OCIMF - Mooring Equipment Guidelines (MEG4)

    £355.00
    Mooring a ship to a berth is a common function for the maritime industry, however incidents that harm ship and terminal personnel still occur. This publication establishes recommended minimum requirements that will help ship designers, terminal designers, ship operators and mooring line manufacturers improve the design, performance and safety of mooring systems.
    ISBN: 9781856097710
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    Published: June 2018

    Published: by OCIMF

    Mooring Equipment Guidelines is an industry publication for the safe mooring of tankers and gas carriers at terminals.

    The publication provides clear and concise guidance for ship and terminal designers, ship operators and mooring line manufacturers on safe mooring system design, with an emphasis on the safety of ship and terminal personnel.

    This fourth edition has been extensively updated and addresses:

    • Lessons learned from incidents, most notably from failures of HMSF mooring lines;

    • Human centred mooring designs and human factors in mooring operations;

    • New and in-development regulations and guidance from the IMO on the safety of mooring;

    • Alternative mooring technologies and how they can be incorporated safely into the design of mooring systems both for ships and terminals.

    Alternatives to the recommendations in this publication should only be introduced on the basis of a risk assessment and should be implemented through a proper management of change process. Any mitigation measures or contingency plans should consider the environmental limits for mooring, stopping cargo transfer and departing the berth.

    This publication establishes recommended minimum requirements that will help ship designers, terminal designers, ship operators and mooring line manufacturers improve the design, performance and safety of mooring systems. To make sure improvements in mooring system design are implemented as soon as possible in the industry, it is recommended that:

    • New ships and terminals are designed and built using the recommendations in this publication.

    • New ships already under construction and existing ships consider making changes that will use the recommendations in this publication.

    • If new build ships under construction or existing ships are unable to follow the recommendations in this publication, they should, as a minimum, develop a Mooring System Management Plan (MSMP) and a Line Management Plan (LMP) that will:

      • Remain on the ship throughout its life as part of the management of change records.

      • Identify a timeline and measures needed to follow the recommendations of this publication.

      • Detail interim measures taken to address the recommendations in this publication, with reasons given for why the changes have not been implemented yet.

    • Where a terminal is already in service, the terminal management should perform a gap assessment with the recommendations in this fourth edition of the Mooring Equipment Guidelines and, where there are gaps, perform a documented risk assessment to ensure these gaps are appropriately managed in accordance with the site’s risk management guidelines to reduce risk and enhance safety. For new build terminals under consideration, or engineering not yet completed, where applicable, consider and implement the recommendations in the fourth edition of MEG.


    This publication is aimed primarily at the hydrocarbon and chemical industry sectors, conventional tankers, gas carriers and the terminals they visit. Many of the guidelines and recommendations in this publication could also be applied to non-conventional tankers and terminals such as Floating (Production) Storage and Offloading units (F(P)SOs) and Floating Storage and Regasification Units (FSUs), particularly where they interface with conventional tankers. In addition, some of the guidance and recommendations can be considered to be equally applicable to other industry sectors and non-tanker ship types.

    With the publication of this edition, the following documents have been superseded and are removed from distribution:

    • Books:

      • Mooring Equipment Guidelines, Third Edition (MEG3).

      • Effective Mooring, Third Edition.

    • Information papers:

      • Potential Hazards Associated with Requests for Additional Mooring Lines by Terminal Operators.

      • Winch Brake Bands Design Considerations Impacting on Reeling Direction Guidelines for Specification of Manufacture, Testing, Procurement of High Modulus Polyethylene Ropes.

      • Summary of the Results of the MARIN Study to Validate the Adequacy of SPM Mooring Equipment Recommendations.

      • Lloyd’s Register Risk Assessment of Emergency Tow-off Pennant Systems (ETOPS) Onboard Tank Vessels.

      • Recommendations for Alternatives to Traditional Emergency Tow-off Pennants.

    Table of Contents

    Glossary

    Abbreviations

    Bibliography

    A note on new terminology

    Introduction to the Mooring System Management Plan and the Line Management Plan

    Section one – Introduction to mooring

    1.1 General

    1.2 Objectives

    1.3 Forces acting on the ship

    1.4 Mooring system design principles

    1.5 Stiffness of lines

    1.6 General mooring guidelines

    1.7 Operational considerations

    1.8 Ship mooring management

    1.9 Mooring System Management Plan

    Section two – Human factors

    2.1 Introduction

    2.2 Safety critical task analysis

    2.3 Human-centred design

    2.4 Operations and maintenance

    2.5 Competence and training

    2.6 Health and wellbeing

    Section three – Mooring forces and environmental criteria

    3.1 Introduction

    3.2 Standard environmental criteria

    3.3 Calculation of forces

    3.4 Mooring restraint requirements

    3.5 Site-specific environmental data and mooring line loads

    Section four – Mooring arrangements and layouts

    4.1 Introduction

    4.2 Piers and sea islands

    4.3 Bow mooring at offshore terminals

    4.4 Multi buoy moorings

    4.5 Towing

    4.6 Transits of canals and waterways

    4.7 Emergency tow-off pennants

    4.8 Barge and small ship mooring

    4.9 Ship to ship transfers

    4.10 Arrangements at cargo manifolds

    4.11 Mooring augmentation in exceptional conditions

    4.12 Combination of various requirements

    4.13 Equipment and fitting line-up with operational considerations

    Section five – Mooring lines

    5.1 Introduction

    5.2 Mooring system design and line selection

    5.3 Factors influencing mooring line performance

    5.4 Maintenance, inspection and retirement

    5.5 Steel wire ropes

    5.6 High modulus synthetic fibre lines

    5.7 Conventional fibre lines

    5.8 Synthetic mooring tails

    Section six – Mooring winches

    6.1 Introduction

    6.2 Selection and specification of mooring winches

    6.3 Design and construction of mooring winches

    6.4 Operation and maintenance of mooring winches

    Section seven – Mooring and towing fittings

    7.1 Introduction

    7.2 Selection and specification of mooring and towing fittings

    7.3 Design and construction of mooring and towing fittings

    Section eight – Structural reinforcements

    8.1 Introduction

    8.2 Design considerations

    8.3 Mooring winches

    8.4 Fairleads

    8.5 Pedestal fairleads

    8.6 Bitts

    8.7 Recessed bitts

    8.8 Bow chain stopper fittings and Smit towing brackets

    8.9 Special considerations for installation

    Section nine – Berth design and fittings

    9.1 Introduction

    9.2 Berth mooring structure layout considerations

    9.3 Performing mooring evaluations and assumptions

    9.4 Establishing environmental operating limits

    9.5 Types and application of berth mooring equipment

    9.6 Operational considerations for design of berth mooring equipment

    9.7 Berth mooring equipment and structural inspection and maintenance

    Section ten – Ship/shore interface

    10.1 Introduction

    10.2 Ship operator responsibility

    10.3 Terminal operator responsibility

    10.4 Ship responsibility

    10.5 Berth operator responsibility

    10.6 Ship mooring personnel responsibility

    10.7 Joint ship/shore meeting and inspection

    10.8 Tug and line boat operations

    10.9 Records of mooring operations

    Section eleven – Alternative mooring technology

    11.1 Introduction

    11.2 Examples of alternative and emerging technologies

    11.3 Due diligence process

    Appendices – Appendix A: Wind and current drag coefficients

    A1 Introduction

    A2 Symbols and notations

    A3 Wind and current drag coefficients for large tankers

    A4 Wind and current drag coefficients for gas carriers

    A5 Example force calculations for VLCC

    Appendix B: Guidelines for the purchasing and testing of mooring lines and tails

    B1 Introduction

    B2 How to use these guidelines

    B3 Stakeholders

    B4 Documentation

    B5 Base design process

    B6 Purchasing process

    B7 Base design manufacture

    B8 Base design testing

    B9 Product supply manufacture

    B10 Product supply quality assurance testing

    B11 Nonstandard testing

    B12 Example documents

    Witherby Connect is the new online library solution for the maritime industry. Created by Witherbys’ in-house development team, Witherby Connect provides users with streamlined access to all major industry publications.

    The browser-based hybrid software means that there is nothing to install and after publications are saved to the browser cache they can be accessed almost instantly both on and offline. This solution delivers more flexibility and security for those working at sea.

    Use on and offline: Witherby Connect provides flexible access. Publications can be viewed while connected to the internet and are downloaded to the browser’s cache for access offline, making it suitable for use even when internet access cannot be guaranteed.

    You can access Witherby Connect on any modern browser including: Google Chrome, Microsoft Edge, Mozilla Firefox and Apple Safari.

    Published: June 2018

    Published: by OCIMF

    Mooring Equipment Guidelines is an industry publication for the safe mooring of tankers and gas carriers at terminals.

    The publication provides clear and concise guidance for ship and terminal designers, ship operators and mooring line manufacturers on safe mooring system design, with an emphasis on the safety of ship and terminal personnel.

    This fourth edition has been extensively updated and addresses:

    • Lessons learned from incidents, most notably from failures of HMSF mooring lines;

    • Human centred mooring designs and human factors in mooring operations;

    • New and in-development regulations and guidance from the IMO on the safety of mooring;

    • Alternative mooring technologies and how they can be incorporated safely into the design of mooring systems both for ships and terminals.

    Alternatives to the recommendations in this publication should only be introduced on the basis of a risk assessment and should be implemented through a proper management of change process. Any mitigation measures or contingency plans should consider the environmental limits for mooring, stopping cargo transfer and departing the berth.

    This publication establishes recommended minimum requirements that will help ship designers, terminal designers, ship operators and mooring line manufacturers improve the design, performance and safety of mooring systems. To make sure improvements in mooring system design are implemented as soon as possible in the industry, it is recommended that:

    • New ships and terminals are designed and built using the recommendations in this publication.

    • New ships already under construction and existing ships consider making changes that will use the recommendations in this publication.

    • If new build ships under construction or existing ships are unable to follow the recommendations in this publication, they should, as a minimum, develop a Mooring System Management Plan (MSMP) and a Line Management Plan (LMP) that will:

      • Remain on the ship throughout its life as part of the management of change records.

      • Identify a timeline and measures needed to follow the recommendations of this publication.

      • Detail interim measures taken to address the recommendations in this publication, with reasons given for why the changes have not been implemented yet.

    • Where a terminal is already in service, the terminal management should perform a gap assessment with the recommendations in this fourth edition of the Mooring Equipment Guidelines and, where there are gaps, perform a documented risk assessment to ensure these gaps are appropriately managed in accordance with the site’s risk management guidelines to reduce risk and enhance safety. For new build terminals under consideration, or engineering not yet completed, where applicable, consider and implement the recommendations in the fourth edition of MEG.


    This publication is aimed primarily at the hydrocarbon and chemical industry sectors, conventional tankers, gas carriers and the terminals they visit. Many of the guidelines and recommendations in this publication could also be applied to non-conventional tankers and terminals such as Floating (Production) Storage and Offloading units (F(P)SOs) and Floating Storage and Regasification Units (FSUs), particularly where they interface with conventional tankers. In addition, some of the guidance and recommendations can be considered to be equally applicable to other industry sectors and non-tanker ship types.

    With the publication of this edition, the following documents have been superseded and are removed from distribution:

    • Books:

      • Mooring Equipment Guidelines, Third Edition (MEG3).

      • Effective Mooring, Third Edition.

    • Information papers:

      • Potential Hazards Associated with Requests for Additional Mooring Lines by Terminal Operators.

      • Winch Brake Bands Design Considerations Impacting on Reeling Direction Guidelines for Specification of Manufacture, Testing, Procurement of High Modulus Polyethylene Ropes.

      • Summary of the Results of the MARIN Study to Validate the Adequacy of SPM Mooring Equipment Recommendations.

      • Lloyd’s Register Risk Assessment of Emergency Tow-off Pennant Systems (ETOPS) Onboard Tank Vessels.

      • Recommendations for Alternatives to Traditional Emergency Tow-off Pennants.

    Table of Contents

    Glossary

    Abbreviations

    Bibliography

    A note on new terminology

    Introduction to the Mooring System Management Plan and the Line Management Plan

    Section one – Introduction to mooring

    1.1 General

    1.2 Objectives

    1.3 Forces acting on the ship

    1.4 Mooring system design principles

    1.5 Stiffness of lines

    1.6 General mooring guidelines

    1.7 Operational considerations

    1.8 Ship mooring management

    1.9 Mooring System Management Plan

    Section two – Human factors

    2.1 Introduction

    2.2 Safety critical task analysis

    2.3 Human-centred design

    2.4 Operations and maintenance

    2.5 Competence and training

    2.6 Health and wellbeing

    Section three – Mooring forces and environmental criteria

    3.1 Introduction

    3.2 Standard environmental criteria

    3.3 Calculation of forces

    3.4 Mooring restraint requirements

    3.5 Site-specific environmental data and mooring line loads

    Section four – Mooring arrangements and layouts

    4.1 Introduction

    4.2 Piers and sea islands

    4.3 Bow mooring at offshore terminals

    4.4 Multi buoy moorings

    4.5 Towing

    4.6 Transits of canals and waterways

    4.7 Emergency tow-off pennants

    4.8 Barge and small ship mooring

    4.9 Ship to ship transfers

    4.10 Arrangements at cargo manifolds

    4.11 Mooring augmentation in exceptional conditions

    4.12 Combination of various requirements

    4.13 Equipment and fitting line-up with operational considerations

    Section five – Mooring lines

    5.1 Introduction

    5.2 Mooring system design and line selection

    5.3 Factors influencing mooring line performance

    5.4 Maintenance, inspection and retirement

    5.5 Steel wire ropes

    5.6 High modulus synthetic fibre lines

    5.7 Conventional fibre lines

    5.8 Synthetic mooring tails

    Section six – Mooring winches

    6.1 Introduction

    6.2 Selection and specification of mooring winches

    6.3 Design and construction of mooring winches

    6.4 Operation and maintenance of mooring winches

    Section seven – Mooring and towing fittings

    7.1 Introduction

    7.2 Selection and specification of mooring and towing fittings

    7.3 Design and construction of mooring and towing fittings

    Section eight – Structural reinforcements

    8.1 Introduction

    8.2 Design considerations

    8.3 Mooring winches

    8.4 Fairleads

    8.5 Pedestal fairleads

    8.6 Bitts

    8.7 Recessed bitts

    8.8 Bow chain stopper fittings and Smit towing brackets

    8.9 Special considerations for installation

    Section nine – Berth design and fittings

    9.1 Introduction

    9.2 Berth mooring structure layout considerations

    9.3 Performing mooring evaluations and assumptions

    9.4 Establishing environmental operating limits

    9.5 Types and application of berth mooring equipment

    9.6 Operational considerations for design of berth mooring equipment

    9.7 Berth mooring equipment and structural inspection and maintenance

    Section ten – Ship/shore interface

    10.1 Introduction

    10.2 Ship operator responsibility

    10.3 Terminal operator responsibility

    10.4 Ship responsibility

    10.5 Berth operator responsibility

    10.6 Ship mooring personnel responsibility

    10.7 Joint ship/shore meeting and inspection

    10.8 Tug and line boat operations

    10.9 Records of mooring operations

    Section eleven – Alternative mooring technology

    11.1 Introduction

    11.2 Examples of alternative and emerging technologies

    11.3 Due diligence process

    Appendices – Appendix A: Wind and current drag coefficients

    A1 Introduction

    A2 Symbols and notations

    A3 Wind and current drag coefficients for large tankers

    A4 Wind and current drag coefficients for gas carriers

    A5 Example force calculations for VLCC

    Appendix B: Guidelines for the purchasing and testing of mooring lines and tails

    B1 Introduction

    B2 How to use these guidelines

    B3 Stakeholders

    B4 Documentation

    B5 Base design process

    B6 Purchasing process

    B7 Base design manufacture

    B8 Base design testing

    B9 Product supply manufacture

    B10 Product supply quality assurance testing

    B11 Nonstandard testing

    B12 Example documents

    Product tags
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