Guidance on diving umbilical management
January 2024 Rev. 02 – Texts of point 8) of Section 4 and Section 7.1.1 amended for clarity. Appendix 4 Anchor Pattern Checklist added
June 2023 Rev. 01. – Correction to Figure 29
May 2023 – Initial publication
Contents
- Introduction
- Application
- Definitions
- Philosophy
- General Umbilical Management
- Identification and Treatment of Hazards
- General
- Azimuth Thrusters
- Tunnel Thrusters
- Propellers
- Voith Schneider Propeller (VSP)
- Miscellaneous Hazards
- Main Umbilical
- Diving Within an Anchor Pattern
- Excursion Umbilical
- Normal Umbilical Operations
- Extended Umbilical Operations During DP Diving Operations
- Distance Calculations
- Plan Distance – Deployment Device / IWTP to Hazard
- True Distance – Deployment Device / IWTP to Hazard
- Maximum Excursion Umbilical Length
- Minimum Excursion Umbilical Length
- Surface Orientated Umbilical Lengths
- Vessel Hazard Diagrams
- Pre-Job Preparation
- Excursion Umbilicals
- Swim Lines
- Swim Line Installation Example Methodology
- Surface Orientated Diving
- Surface Orientated Diving with IWTP
- Closed Bell Diving with IWTP
- References
- Appendix 1 – Distance Calculations Worked Examples
- Appendix 2 – Vessel Hazard Diagram
- Appendix 3 – Example Swim Line Setup Storyboards
- Appendix 4 – Anchor Pattern Checklist
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