TS EN ISO 24807

TS EN ISO 24807 addresses requirements for rebreather diver training programmes for dives to 100 m using a breathing mixture containing helium and requiring mandatory decompression stops. In practical terms, it defines the training framework for advanced recreational rebreather diving, focusing on the competencies a diver must develop and on how those competencies are assessed.

In general technical context, a rebreather recycles exhaled gas, removes carbon dioxide, and maintains an appropriate breathing mix for the diver. Compared with open-circuit systems, it changes gas use and gas management, but it also makes depth-related issues more demanding: oxygen partial pressure control, inert gas loading, decompression planning, and emergency handling all become central. For that reason, training is not limited to equipment operation; it also includes pre-dive planning, monitoring, fault management, and team coordination as part of a broader competence set.

Training scope and assessment focus

The standard specifies the competencies needed for decompression diving to 100 m and sets out criteria for evaluating those competencies. It also states the conditions under which this training is provided, in addition to the general requirements for recreational diving service provision in ISO 24803. In this way, the document creates a common framework not only for the training content itself, but also for the learning environment, delivery conditions, and assessment of outcomes.

• Rebreather training using a breathing mixture containing helium
• Decompression dives planned to a depth of 100 m
• Operational skills associated with mandatory decompression stops
• Criteria for evaluating required competencies
• Additional training conditions alongside the general ISO 24803 service requirements