Mooring Equipment Guidelines 3rd Edition
The shipping industry has always been concerned with safe mooring practices. A fundamental aspect of this concern entails the development of mooring systems which are adequate for the intended service, with maximum integration of standards across the range of ship types and sizes.
Although numerous standards, guidelines and recommendations concerning mooring practices, mooring fittings and mooring equipment exist, where guidance is given or it is often incomplete. For example, the number of hawsers and their breaking strength may be recommended without any advice on mooring winch pulling force or brake holding capacity. These guidelines are intended to provide an extensive overview of the requirements for safe mooring from both a ship and terminal perspective embrace the full spectrum of issues from the calculation of a ship’s restraint requirements, the selection of rope and fitting types to the retirement criteria for mooring lines.
This 3rd edition provides a major revision and update to the original content and reflects changes in ship and terminal design, operating practices and advances in technology and you can buy it online now for £225 from Witherby Seamanship (free p&p for all UK deliverys)
MEG3 consolidates the following titles:
Guidelines on the Use of High-Modulus Synthetic Fibre Ropes as Mooring Lines on Large Tankers (First Edition 2002)
Recommendations for Ships' Fittings for Use with Tugs (First Edition 2002)
Prediction of Wind and Current Loads on VLCCs (Second Edition 1994)
Prediction of Wind Loads on Large Liquefied Gas Carriers (First Edition Reprinted 1995)
The OCIMF working group, chaired by S. A. Rahim (IMT/ExxonMobil), consisted of 29 delegates from 9 member companies and 12 non-member organizations. The organisations included IACS, ICS, INTERTANKO, SIGTTO, IAPH, NI, shipbuilders, rope and mooring equipment manufacturers, and technical consultants.
Table of Contents
INTRODUCTION
LIST OF FIGURES
LIST OF TABLES
LIST OF PICTURES
GLOSSARY OF TERMS AND ABBREVIATIONS
BIBLIOGRAPHY
1.1 General
1.2 Forces Acting on the Ship
1.2.1 Wind and Current Forces
1.3 Mooring Pattern
1.4 Elasticity of Lines
1.5 General Mooring Guidelines
1.6 Operational Considerations
1.7 Terminal Mooring System Management
1.7.1 Operating Limits
1.7.2 Operating Guidelines/Mooring Limits
1.7.3 Joint Terminal/Ship Meeting and Inspection
1.7.4 Instrumented Mooring Hooks or Visual Inspection of Mooring Lines
1.8 Ship Mooring Management
1.8.1 Line Tending
1.9 Emergency and Excessively High Mooring Load Conditions
1.10 Limitations on Use of Tugs and Boats
1.11 General Recommendations
1.11.1 Recommendations for Berth Designers
1.11.2 Recommendations for Terminal Operators
1.11.3 Recommendations for Ship Designers
1.11.4 Recommendations for Ship Operators
2 MOORING RESTRAINT AND ENVIRONMENTAL CRITERIA
2.1 General Considerations
2.2 Standard Environmental Criteria
2.3 Calculation of Forces
2.4 Mooring Restraint Requirements
2.4.1 Basic Principles of Mooring Calculations
2.4.1.1 The Principle of Static Equilibrium Section
2.4.1.2 The Load/Deflection Characteristics of each Mooring Line and Breasting Dolphin
2.4.1.3 The Geometrical Relationship between the Parts of the System
2.4.2 Standard Restraint Requirements
2.5 Site-Specific Environmental Data and Mooring Line Loads
2.5.1 Most Probable Maximum (MPM) Wave Motions
3 MOORING ARRANGEMENTS AND LAYOUTS
3.1 Principal Objectives
3.2 Requirements at Piers and Sea Islands
3.2.1 Number, Size and Type of Lines
3.2.2 Arrangements for Breast Lines
3.2.3 Arrangements for Spring Lines
3.2.4 Special Arrangements for Gas Carriers
3.3 Requirements at SPMs
3.4 Requirements for Emergency Towing, Escorting and Pull-Back
3.4.1 Fittings for Tug Escort and Pull-Back
3.5 Requirements for Multi-Buoy Moorings
3.6 Requirements for Harbour Towing
3.7 Requirements for Barge Mooring
3.8 Requirements for Canal Transit
3.9 Requirements for Ship-to-Ship (STS) Transfer
3.9.1 Requirements for Offtaker
3.9.2 Requirements for Discharge Ship
3.10 Arrangements at Cargo Manifolds
3.11 Mooring Augmentation in Exceptional Conditions
3.11.1 Provision of Shore Moorings
3.11.2 Use of Shore-Based Pulley
3.11.3 Advantage of Pulley System
3.11.4 Disadvantage of Pulley System
3.12 Emergency Towing-off Pennants
3.13 Combination of Various Requirements
3.14 Safety and Operational Considerations
3.15 Equipment and Fitting Line-up
4 DESIGN LOADS, SAFETY FACTORS AND STRENGTH
4.1 General
4.2 Basic Strength Philosophy
4.3 Existing Standards and Requirements
4.4 Recommended Design Criteria
4.4.1 Bitts (Double Bollards)
4.4.2 Single Cruciform Bollard Section
4.4.3 Recessed Bitt
4.4.4 Closed Chocks
4.4.5 Pedestal Fairleads and Rollers of Button-Roller Chocks
4.4.6 Universal Fairlead (4 Roller Type)
4.4.7 Universal Fairlead (5 Roller Type)
4.4.8 Emergency Towing Arrangement
4.4.9 Single Point Mooring Equipment
4.4.10 Mooring Winches
4.4.11 Comparison of Combined Stresses with the 85% of Yield Criterion
4.5 Strength Testing of Mooring Fittings
4.6 Marking of Mooring Fittings
4.7 General Recommendations
4.7.1 Recommendations for Ship Designers
4.7.2 Recommendations for Ship Operators
5.1 Basic Considerations
5.2 Mooring Winches
5.3 Chocks and Fairleads
5.4 Pedestal Fairleads
5.5 Bitts
5.6 Recessed Bitts
5.7 SPM Fittings and Smit Brackets
5.8 Tug Push Points
5.9 Special Considerations
5.9.1 Rounded Gunwale Connection
5.9.2 Doublers versus Inserts
5.9.3 High Strength Steel Fittings
5.10 Certification and Inspection
6.1 General
6.1.1 General Safety Hazards
6.1.2 Strength Criteria
6.1.3 Elasticity
6.1.4 Record Keeping
6.2 Wire Mooring Lines
6.2.1 Material
6.2.2 Construction
6.2.3 Corrosion Protection
6.2.4 Bend Radius
6.2.5 Handling, Inspection and Removal from Service
6.2.6 Standard Specifications
6.3 Conventional Fibre Mooring Lines Section
6.3.1 General
6.3.1.1 Polyester
6.3.1.2 Polyamide (previously referred to as 'Nylon')
6.3.1.3 Polypropylene
6.3.1.4 Combinations of Materials
6.3.2 Construction
6.3.3 Bend Radius
6.3.4 Handling and Storage of Synthetic Lines
6.4 High Modulus Fibre Mooring Lines
6.4.1 General
6.4.2 Properties of High Modulus Synthetic Fibres
6.4.3 High Modulus Synthetic Fibre Materials
6.4.3.1 Trade Names
6.4.3.2 Aramid Fibres
6.4.3.3 Liquid Crystal Polymer (LCP) Fibres
6.4.3.4 High Modulus Polyethylene (HMPE) Fibres
6.4.4 High Modulus Synthetic Rope Constructions
6.4.5 Characteristics
6.4.5.1 Strength
6.4.5.2 Elasticity
6.4.5.3 Chemical Resistance
6.4.6 Selection Criteria
6.4.6.1 Strength
6.4.6.2 Construction
6.4.6.3 Elastic Elongation
6.4.6.4 Coefficient of Friction
6.4.7 Installation
6.4.7.1 General
6.4.7.2 Chafe Protection
6.4.7.3 Mooring Winches
6.4.7.4 Fatigue and Service Life
6.4.8 Inspection and Removal from Service
6.5 Synthetic Tails
6.5.1 General
6.5.2 Tail Length
6.5.3 Retirement Criteria
6.5.4 Methods of Connecting Tails
7 WINCH PERFORMANCE, BRAKE HOLDING CAPACITY AND STRENGTH REQUIREMENTS
7.1 Function and Type of Mooring Winches
7.1.1 Automatic Tension Winches
7.2 Winch Drums
7.2.1 Split Drums Section
7.2.2 Undivided Drums
7.2.3 Handling of SPM Pick-up Ropes
7.3 Winch Drives
7.3.1 Hydraulic Drives
7.3.2 Self-Contained Electro-Hydraulic Drives
7.3.3 Electric Drives
7.3.4 Steam
7.4 Winch Brakes
7.4.1 Layers of Mooring Line on Drum
7.4.2 Band Brakes
7.4.2.1 Torque Applied
7.4.2.2 Condition of the Winch
7.4.2.3 Winch in Gear
7.4.2.4 Friction Coefficient
7.4.2.5 Load Dependency of Holding Capacity
7.4.2.6 Sensitivity to Reeling Direction
7.4.3 Disc Brakes
7.4.4 Input Brakes
7.4.5 Winch Brake Testing
7.4.5.1 General
7.4.5.2 Frequency
7.4.5.3 Test Specification
7.4.5.4 Supervision of Testing
7.4.5.5 Test Equipment
7.4.5.6 Method of Testing
7.4.6 Brake Holding Capacity
7.5 Winch Performance
7.5.1 Rated Pull
7.5.2 Rated Speed
7.5.3 Light-Line Speed
7.5.4 Stall Heaving Capacity
7.5.5 Drum Capacity
7.6 Strength Requirements
7.7 Winch Testing
7.7.1 Rules Concerning Testing at Manufacturer's Facility for the Acceptance of the Manufacturer and Purchaser
7.7.2 On-board Acceptance Test
7.8 Summary of Recommendations
7.8.1 Recommendations for Ship Designers
7.8.2 Recommendations for Ship Operators
8.1 Introduction
8.2 Mooring Bitts Section
8.3 Cruciform Bollards
8.4 Closed and Panama-Type Chocks
8.5 Roller Fairleads and Pedestal Fairleads
8.6 Universal Roller Fairleads
8.7 Selection of Fitting Type
8.8 Stoppers
A Wind and Current Drag Coefficients for VLCC's and Gas Carriers and Example Force Calculation
B Rope Over-strength
C Guidelines for Handling, Inspection and Removal from Service of Wire Mooring Lines
D Guidelines for Inspection and Removal from Service of Fibre Ropes
E Tanker Mounted SPM Fittings
F Strength of Chain Tensioned over a Curved Surface
MEG 3 is available to buy from Witherby Seamanship for £225
ISBN: 9781905331321
Publisher: Witherby Seamanship
Publication Date: 01 October 2008
Format: Hardback
Language: English
Pages: 288 p.
