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
Reference(s): IMCA D078
Published:January 2024
Version:Rev. 0.2
Grade:IMCA Recommended Practice
Category:
Tags:

Members should log in to access downloads
and discounted pricing on physical items.