Guidance for diving supervisors
- Recommended Practice
- Revision 2.1 - November 2025
This IMCA Recommended Practice aims to improve performance in the marine contracting industry by providing diving supervisors with comprehensive guidance and best practice for all aspects of commercial diving operations
The document covers safety protocols, equipment handling, and emergency procedures, and includes information on IMCA certification schemes for diving supervisors and life support technicians, as well as guidelines for assessing and assuring competence.
Contents
Introduction
Diving physics
Diving medicine and first aid
Environmental conditions
Communications
Documentation
Management and planning
Support locations
Gas handling
General diving procedures
Surface orientated air diving
Surface orientated mixed gas diving
Closed bell diving
Chambers (PVHOs)
General safety requirements
References
Appendix A – Definition of terms
Appendix B – List of acronyms
Appendix C – IMCA certification schemes
Appendix D – Maximum bottom time limitation
Appendix E – Weather terminology and classifications
Appendix F – Vessel hazard drawings
Appendix G – Summary of changes incorporated in Rev. 2 of IMCA D022
Revision
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Rev. 2.1 - November 2025Incorporation of further recommendations of Members about recent Rev. 2
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Rev. 2 - October 2025Full technical review to align with current industry best practice
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Rev. 1.3 - June 2024Section 10.1 updated with tables 1 &2 from DMAC 07
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Rev. 1.2 - August 2016Section 10.3 updated to incorporate AODC 020 (later replaced by IMCA D022)
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Rev. 1.1 - April 2015Sections 9.13, 14.34.2 and 15.21 updated
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Rev. 1 - May 2014To reflect changes in IMCA diving documentation
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Rev. - May 2000Initial publication