TS EN ISO 24807

TS EN ISO 24807 is a standard for structuring diver training in rebreather operations up to 100 m, where dives require mandatory decompression stops and use a breathing mixture containing helium. Its focus is on the competencies such a programme must develop, the criteria used to assess those competencies, and the conditions under which the training is delivered.

Technical context for rebreather diver training

A rebreather recycles part of the gas breathed by the diver and helps maintain the breathing mix through control of gas composition. Compared with open-circuit equipment, it introduces more complex considerations in gas management, dive planning, and operational discipline. In general technical context, training for this environment is therefore not limited to equipment handling; it also covers situational awareness, emergency preparedness, and an understanding of decompression diving principles.

What this standard covers

• Rebreather diver training programmes for dives to 100 m using a helium-containing breathing mixture
• Competencies needed for dives with mandatory decompression stops
• Evaluation criteria for those competencies
• Training provided in addition to the general recreational diving service requirements of ISO 24803

This standard does not replace the broader recreational diving service framework; it adds a specific structure for deep, technically demanding rebreather training. Taken together, the 100 m depth limit, helium-based breathing mixture, and decompression requirement define a specialist training domain that goes beyond ordinary sport diving and calls for disciplined planning and procedure management. The value of TS EN ISO 24807 lies in providing a common competency framework for training providers working in this area.