ISO 24805:2022 PDF

Recreational diving services — Requirements for rebreather diver training — Decompression diving to 45 m

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Title (English):

ISO 24805:2022

Recreational diving services — Requirements for rebreather diver training — Decompression diving to 45 m

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 19
Publication date:: August 30, 2022
Edition:: ISO IS 24805 edition 1 version 1
ICS:: 03.080.30

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Description (English):

This document specifies requirements for rebreather diver training programmes which provide the competencies required to perform dives with a rebreather to 40 m using a nitrox breathing mixture or to 45 m using a trimix breathing mixture, requiring mandatory decompression stops. This document specifies evaluation criteria for these competencies. This document specifies the requirements under which training is provided, in addition to the general requirements for recreational diving service provision in accordance with ISO 24803.

Technical details

Technical committee: ISO/TC 228 - Tourism and related services
SKU: ISO 24805:2022

Abstract

Overview - What ISO 24805:2022 covers

ISO 24805:2022 is an international standard that defines minimum requirements for rebreather diver training for recreational decompression diving to 40 m using nitrox or 45 m using trimix, where mandatory decompression stops are required. It specifies the competencies learners must acquire, the evaluation criteria for those competencies, and the conditions under which training must be delivered. The standard complements the general recreational diving service requirements in ISO 24803.

Key technical topics and requirements

ISO 24805:2022 organizes training requirements into theoretical knowledge, practical skills, prerequisites and evaluation. Major technical topics include:

Scope and prerequisites
- Maximum depths: nitrox to 40 m, trimix to 45 m
- Mandatory decompression diving techniques
- Minimum age, required prior diving experience and health fitness criteria
Theoretical knowledge
- Rebreather fundamentals and types (e.g., CCR, SCR)
- Function and operation of rebreather components
- Breathing performance, gas density and gas mixtures
- Gas supply and CO2 absorbent duration
- Decompression theory and procedures for planned decompression stops
- Risks: hypercapnia, hypoxia, hyperoxia and CO-related issues
- Buddy system and team procedures
Practical skills and training parameters
- Rebreather assembly, pre-water checks and maintenance
- Pre-dive, in-water and post-dive procedures
- Emergency responses and malfunction management (response when breathing loop is available or not)
- Required in-water sessions and instructor responsibilities
- Breathing gas limits for CCR and SCR platforms
Evaluation and certification
- Knowledge and skill evaluation criteria for nitrox and trimix training paths
- Proof of qualification and record keeping

Practical applications - who uses this standard

ISO 24805:2022 is intended for:

Dive training organizations designing rebreather courses
Scuba instructors and instructor trainers teaching advanced rebreather and decompression techniques
Dive operators and centres that provide advanced rebreather experiences
Certification bodies and regulators establishing minimum competency and safety criteria
Advanced recreational divers planning training pathways for deep rebreather decompression dives

Related standards

ISO 24803 - Recreational diving service providers (general requirements)
ISO 24804 - Rebreather training - No-decompression diving
ISO 11107 - Enriched Air Nitrox training (EAN)
ISO 24801-2, ISO 24802-2 - Diver and instructor training levels

ISO 24805:2022 provides a practical, safety-focused framework to standardize advanced rebreather training, ensuring consistent competencies for decompression diving to 45 m.

Related standards

Standards mentioned in the description

Abstract

Overview - What ISO 24805:2022 covers

Key technical topics and requirements

ISO 24805:2022 organizes training requirements into theoretical knowledge, practical skills, prerequisites and evaluation. Major technical topics include:

Scope and prerequisites
- Maximum depths: nitrox to 40 m, trimix to 45 m
- Mandatory decompression diving techniques
- Minimum age, required prior diving experience and health fitness criteria
Theoretical knowledge
- Rebreather fundamentals and types (e.g., CCR, SCR)
- Function and operation of rebreather components
- Breathing performance, gas density and gas mixtures
- Gas supply and CO2 absorbent duration
- Decompression theory and procedures for planned decompression stops
- Risks: hypercapnia, hypoxia, hyperoxia and CO-related issues
- Buddy system and team procedures
Practical skills and training parameters
- Rebreather assembly, pre-water checks and maintenance
- Pre-dive, in-water and post-dive procedures
- Emergency responses and malfunction management (response when breathing loop is available or not)
- Required in-water sessions and instructor responsibilities
- Breathing gas limits for CCR and SCR platforms
Evaluation and certification
- Knowledge and skill evaluation criteria for nitrox and trimix training paths
- Proof of qualification and record keeping

Practical applications - who uses this standard

ISO 24805:2022 is intended for:

Dive training organizations designing rebreather courses
Scuba instructors and instructor trainers teaching advanced rebreather and decompression techniques
Dive operators and centres that provide advanced rebreather experiences
Certification bodies and regulators establishing minimum competency and safety criteria
Advanced recreational divers planning training pathways for deep rebreather decompression dives

Related standards

ISO 24803 - Recreational diving service providers (general requirements)
ISO 24804 - Rebreather training - No-decompression diving
ISO 11107 - Enriched Air Nitrox training (EAN)
ISO 24801-2, ISO 24802-2 - Diver and instructor training levels

ISO 24805:2022 provides a practical, safety-focused framework to standardize advanced rebreather training, ensuring consistent competencies for decompression diving to 45 m.

ISO 24805:2022 PDF

Technical details

Abstract

Overview - What ISO 24805:2022 covers

Key technical topics and requirements

Practical applications - who uses this standard

Related standards

Related standards

Abstract

Overview - What ISO 24805:2022 covers

Key technical topics and requirements

Practical applications - who uses this standard

Related standards

Related standards

Recreational diving services - Requirements for recreational diving providers (ISO 24803:2017)

Recreational diving services - Requirements for rebreather diver training - No-decompression diving

Recreational diving services — Requirements for training programmes on enriched air nitrox (EAN) diving

Recreational diving services - Requirements for the training of recreational scuba divers - Part 2: Level 2 -…

Recreational diving services - Requirements for the training of scuba instructors - Part 2: Level 2 (ISO 2480…