TS EN ISO 24806

TS EN ISO 24806 addresses the training of divers for recreational diving with rebreathers. It focuses on dives to 60 m, using a breathing mixture containing helium and involving mandatory decompression stops, and it sets requirements for the competencies to be taught and assessed. In practical terms, the standard sits at the intersection of deep-diving practice, rebreather operation, and structured competency evaluation.

Technical context for rebreather diver training

Rebreathers recycle much of the breathing gas instead of exhausting it directly into the water, which improves gas efficiency but adds technical complexity. Divers must manage oxygen levels, carbon dioxide removal, gas monitoring, and the interaction between depth and decompression obligations. In this context, helium-containing breathing mixtures are used in deeper profiles to help manage breathing density and narcotic effects. The training addressed by this standard therefore goes beyond ordinary recreational diving instruction and is aimed at the knowledge and practical control needed for advanced dive planning and execution.

What this standard covers

• Requirements for rebreather diver training up to 60 m.
• Diving with a breathing mixture containing helium.
• Dives that require mandatory decompression stops.
• Criteria for evaluating the competencies achieved in training.
• Training conditions provided in addition to the general recreational diving service requirements of ISO 24803.

By defining both the training requirements and the evaluation approach, the document helps create a common technical baseline for advanced recreational rebreather education. It supports consistency in how instructors and training organisations structure competency-based learning for deeper dives, while remaining specific to the 60 m decompression-diving context described in the scope.