Anchoring Systems and Procedures  (downloadable product)

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Published Date

January 2010


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Anchoring Systems and Procedures (downloadable product)

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This publication, which supersedes the 1st edition of ‘Anchoring Systems and Procedures for Large Tankers’, published in 1982, has been prepared by OCIMF to provide recommendations and guidance with the aim of promoting the safe operation and satisfactory performance of anchoring systems  

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As background to the development of this revised publication; concerns had been expressed, by OCIMF member companies and others, about an increase in the number of incidents involving anchor losses, windlass motor failures and associated personnel injuries. A review of third party anchoring incidents by an OCIMF member highlighted the following various issues. As a result of the review, it was agreed to revise and update the information contained in the original 1982 publication to assist in promulgating the lessons learnt from incidents, to provide improved information on anchoring practices and to recognise advances made in anchor systems in the intervening years. In particular, this publication highlights the design capabilities and limitations of anchoring systems and equipment with the aim of enhancing the safety of operations.

The scope of this publication addresses anchoring systems and procedures that are applicable to all vessel types, irrespective of their size


 

 

 

List of Figures
List of Tables
Glossary of Terms and Abbreviations
Bibliography
Section1

Purpose and Scope
Section 2

Issues Associated with Anchoring Systems and Procedures
Section 3
General Description of Anchoring Systems
3.1 Anchoring System
3.1.1 Basic Equipment Arrangement
3.1.2 Safety Aspects
3.1.3 Limitations of the Anchoring System
3.2 Anchors
3.3 Chain Cable

3.4 Hawse Pipe
3.5 Anchor Lashing
3.6 Chain Stopper
3.7 Windlass
3.7.1 General
3.7.2 Cable Lifter

3.7.3 Windlass Gears and Clutches
3.7.4 Stripper Bar
3.7.5 Windlass Brake Systems
3.7.5.1 Band Brake
3.7.5.2 Disc Brake

3.7.5.3 Brake Drum and Disc Material
3.7.5.4 Hydraulically Assisted Brakes
3.8 Drive Units
3.8.1 High Pressure Hydraulic Systems
3.8.1.1 Protection Against Catastrophic Failure
3.8.2 Low Pressure Hydraulic Systems
3.8.3 Electric Systems

3.8.3.1 Frequency Controlled
3.8.3.2 Pole Changing

3.8.4 Steam
3.9 Windlass Control Systems
3.9.1 Remote Control
3.9.2 Chain Counters
3.10 Spurling Pipe and Chain Locker
Section 4
Design Considerations
4.1 Design Standard
4.2 Design Philosophy of Anchoring Equipment
4.3 Environmental Forces Acting on a Ship at Anchor
4.4 Anchors
4.4.1 Anchor Construction
4.4.2 Types of Anchor and Stowage
4.4.3 Holding Power of Anchors
4.5 Chain Cable
4.5.1 Length of Chain Cable
4.5.2 Material
4.5.3 Cable Strength
4.5.4 Bitter End
4.6 Chain Stopper
4.7 Windlass
4.7.1 Drive Units for Windlasses
4.8 Testing of Anchor Equipment and Systems
4.8.1 Anchor
4.8.2 Chain Cable
4.8.3 Windlass

4.8.4 Sea Trials
4.9 Interface Between Ship Structure and Anchoring Equipment
4.10 Arrangement of Equipment
4.10.1 Anchor Stowage and Hawse Pipe
4.10.2 Chain Lockers and Spurling Pipes
4.10.3 Access, Safety and Security
4.11 Additional Equipment
4.11.1 Cable Tension Monitoring System
4.11.2 Chain Counters and Speed Measurement
4.11.3 Remote Control Options

4.11.4 CCTV Monitoring Systems
Section 5
Operational Procedures
5.1 Anchoring Procedures
5.1.1 General
5.1.2 Preparation for Anchoring
5.1.3 Methods of Anchoring

5.1.4 Commonly Used Anchoring Procedures
5.1.5 Conventional Buoy Moorings
5.2 Maintaining an Anchor Watch
5.2.1 Watchkeeping Responsibilities
5.2.2 Securing the Cable at Anchor
5.3 Getting Underway
5.3.1 Avoiding Damage to the Anchor System
5.3.2 Emergency Recovery of Anchor and Cable
5.4 Use of Anchors in an Emergency
Anchoring Systems and Procedures
Section 6
Maintenance Issues
6.1 Routine Maintenance
6.1.1 Inspection
6.1.2 Lubrication
6.1.3 Flexible Hoses

6.1.4 Windlass Components
6.1.5 Windlass Drum Brakes
6.1.6 Chain Stopper
6.1.7 Chain Cable
6.2 Surveys and Inspections During Refit
6.2.1 Class Survey Procedures
6.2.2 Ranging and Inspection of Cable
6.2.3 Kenter Shackle
6.2.4 ‘D’ Shackle
6.2.5 Anchor Swivels
6.2.6 Anchors
6.2.7 Brakes

Appendices
A An Example of Typical Planned Maintenance Activities
B An Example of Typical Refit Inspection, Survey and Maintenance Activities
C Example Certification for Anchor Chain Cable and Chain Cable Fittings   

 

Title: Anchoring Systems and Procedures (downloadable product)
Edition: 2nd
Product Code: WS1256EA
ISBN: ISBN 13: 978-1-85609-409-2 (9781856094092), ISBN 10: 1-85609-409-X (185609409X)
Published Date: January 2010
Author: OCIMF

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