Guidance on prevention and mitigation of lost bell emergencies

  • Recommended Practice
  • Revision 1 - January 2026

This document provides IMCA's detailed guidance on the prevention and mitigation of lost diving bell emergencies.

Contents

  • Introduction
  • Aims
  • Application
  • The Prevention of Lost Bell Diving Incidents
  • The Mitigation of Lost or Stricken Bell Diving Incidents
  • References
  • Appendix A – Bell Mounted Acoustic Transponder Specification
  • Appendix B – Diver Operated Interrogator/Receiver
  • Appendix C – Bell Emergency Communication
  • Appendix D – Stricken Bell – Diver Actions (Example)
  • Appendix E – CO2 Scrubbing – Example Scrubbing Capabilities

Revision

  • Rev. 1 - January 2026
    Strategic review and validation of Emergency Lung Powered Scrubber durations
  • Rev. 0.1 - May 2024
    Page 2, bookmarking and references updated; no change to content
  • Rev. - May 2023
    Initial publication