Guidance on prevention and mitigation of lost bell emergencies

Contents

• Introduction
• Aims
• Application
• The Prevention of Lost Bell Diving Incidents
  • Diving Bells and Bell Launch and Recovery Systems – Fitness for Purpose
  • Primary Hazard
  • Moonpool and Cursor Hazards
• The Mitigation of Loss Bell Diving Incidents
  • Emergency Procedures and Preparedness
  • Emergency Isolation of Gas Circuits in the Event of a Ruptured Bell Umbilical
  • Emergency Location of a Lost Diving Bell
  • Through-Water Communications
  • Bell Ballast Release Systems and Buoyant Ascent
  • Lost Bell Survival
• Appendix 1 – Bell Mounted Acoustic Transponder Specification
• Appendix 2 – Diver Operated Interrogator/Receiver
• Appendix 3 – Bell Emergency Communication
• Appendix 4 – Bell Ballast Release Systems