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    • Background

    • Aims

    • Application

    • Recommendations 

      • Diving Depths and Oxygen Percentages 

      • Calibration Gases 

      • Gas Analysis and Monitoring 

      • Marking and Colour Coding of Cylinders  

      • Use of Entirely Inert Gases Considered Essential for Operational Reasons 

      • Entirely Inert Gas Use during Periodic Leak Testing of Saturation Diving Systems 

      • Permit-to-Work Systems for the Use of Entirely Inert Gas(es) During Diving Operations 

      • The Use of Diving Gases Containing a Minimal Quantity of Oxygen 

    • References

    Date: Reason: Revision:
    Date:February 2024 Reason:Updating page 2, reference links and bookmarking; no change to content Revision:Rev. 0.1
    Date:July 2022 Reason:Updated and issued as IMCA D070 Revision:Rev.
    Date:February 1986 Reason:Initial publication as AODC 038 Revision:Rev.

IMCA documents

Find out more about the different types of document.

Our Guidance documents are categorised as follows:

  • Code of Practice – Its uniform application is recognised as essential for the safe and efficient conduct of marine contracting projects. IMCA expects the highest level of compliance with this category from its Members.

  • Recommended Practice – Its uniform application is recognised as necessary for the safe and efficient conduct of marine contracting projects. IMCA expects a high level of compliance with this category from its Members.

  • Informative Guidance – Its application is recognised as useful for the safe and efficient conduct of marine contracting projects. IMCA expects its Members to take appropriate account when planning, managing, and conducting their marine contracting projects.

Our Information Notes covering safety, technical, regulatory, commercial and various other issues relevant to its Members. Non-members can explore a small number of individual articles deemed of broader industry interest.

Anyone working for a Member company has unlimited access to our entire library of documents. This degree of transparency and ready-availability ensures that contractors, suppliers, and operators always have access to them and are aligned on the latest industry good practice.

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