Commercial diving

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Published in October 2009 by the Workplace Safety and Health Council in collaboration with the Ministry of Manpower. All rights reserved. This technical advisory may not be reproduced or transmitted in any form or by any means in whole or in part, without prior written permission. The information provided in this technical advisory is accurate as at time of printing. Please note that allinformation in this technical advisory are meant for learning purposes only. The learning points and information are not exhaustive and should not be taken to encapsulate all the responsibilities and obligations of the user of this technical advisory under the law. The publisher of this technical advisory does not accept any liability or responsibility to any party for losses or damage arising fromfollowing this technical advisory. This publication is available on the Workplace Safety and Health Council website: www.wshc.gov.sg Email: contact@wshc.gov.sg

Technical Advisory for

Inland/Inshore Commercial Diving Safety and Health
Technical Advisory for Inland/Inshore Commercial Diving Safety and Health

Year of Issue : 2009

120

Contents
1.0 2.0 2.1 2.2 3.0 3.1 3.1.1 3.1.2 3.1.33.1.4 3.1.5 3.1.6 3.1.7 3.2 3.2.1 3.2.2 3.2.3 3.2.4 3.2.5 3.3 3.3.1 3.3.2 3.3.3 3.3.4 3.3.5 3.3.6 3.3.7 3.3.8 3.3.9 3.4 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 Preface Introduction Scope and Application Terms and Definitions Hazards in Commercial Diving Work Environmental Hazards Currents, Tides, Tidal Range and Slack Water Contaminated Water Diving Restricted Surface Visibility Restricted UnderwaterVisibility Sea State Weather Marine Animals Operational Hazards Water Intakes and Discharges Differentials in Pressure Lost Diver Confined Space/Over head environment Entanglement/Entrapment Physiological Hazards Drowning Thermal exposure Decompression Illness (DCI) Barotrauma Shallow Water Blackouts Nitrogen Narcosis Oxygen Toxicity Carbon Dioxide Buildup Carbon Monoxide Buildup Flying AfterDiving Personnel and Responsibilities Sites Owners Client/Main Contractor/Others Diving Company/Contractor Diving Supervisor Diver Diver’s Attendant Standby Diver Health, Fitness and First Aid Training 04 05 05 07 16 16 16 19 19 20 20 20 21 21 21 22 22 22 23 24 24 24 26 30 37 37 38 40 41 41 44 44 44 46 47 48 49 49 50 51
1

5.0 5.1 5.2 5.2.1 5.2.2 5.2.3 5.2.4 5.2.5 5.2.6 5.2.7 5.2.8 5.2.9 5.2.105.2.11 5.2.12 5.2.13 5.3 5.3.1 6.0 6.1 6.1.1 6.1.2 6.2 6.2.1 6.2.2 6.2.3 6.3 7.0 8.0 8.1 8.2 9.0 9.1 9.2 10.0 10.1 10.2 10.3 10.4 10.5

Equipment Equipment Standards Minimum Equipment Required to Carryout a Diving Operation Self Contained Breathing Apparatus (SCUBA) Diving Masks and Helmets (Half and Full Face) Surface Supplied Diving Equipment (SSDE) Bail Out Bottle (Cylinder) Dive ComputersFirst Stage Regulator Personal Diving Equipment SCUBA Replacement Package (SRP) Diver Access/Egress of the Water and Emergency Recovery of a Diver Deck Decompression Chamber (DDC) Low Pressure (LP) and High Pressure (HP) Air Compressors High Pressure (HP) Cylinders Diver’s Air Supply Volumes Service and Maintenance of Equipment Planned Maintenance System (PMS) Different Diving Techniques andProcedures Dive Planning Dive Plan Environmental Considerations Selection of Diving Techniques and Method SCUBA Diving Technique SSDE Diving Technique SCUBA - Lifeline Diving Technique Dive Team Size Project Specific Equipment Communications Diving Signals and Flags Diving Line Signals Diving Support Locations Diving Platforms Equipment Mobilisation Diving Operation Dive Briefing Pre-Dive Checks Tendingthe Diver Ascent Post-Dive Procedures

52 52 52 52 54 55 58 59 61 61 62 62 63 64 65 66 70 70 71 71 72 72 72 72 73 74 74 75 76 76 76 78 78 79 80 80 80 81 81 82

2

11.0 11.1 11.2 11.3 11.3.1 11.3.2 11.4 11.4.1 11.4.2 12.0 13.0 13.1 13.1.1 13.1.2 13.2 13.3 14.0 14.1 14.2 14.3 15.0 16.0 17.0

Organisation, Planning and Records General Diver Registration/Training Matrix Dive Proposal and...
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