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International
Standard
ISO 24808
First edition
Recreational diving services —
2024-04
Requirements for rebreather
instructor training
Services relatifs à la plongée de loisirs — Exigences concernant la
formation des moniteurs recycleur
Reference number
© ISO 2024
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Competencies . 3
5 Prerequisites for training . 4
5.1 General .4
5.2 Common prerequisites .4
5.3 Minimum age . .4
5.4 Health requirements .4
5.5 Preassessment .4
5.6 Rebreather instructor level 1 .4
5.7 Rebreather instructor level 2 .5
5.8 Rebreather instructor level 3 .5
5.9 Rebreather instructor level 4 .5
6 Introductory information . 5
7 Theoretical knowledge . 5
8 Practical skills . 6
8.1 General skills .6
8.2 Rescue skills .6
9 Training equipment and training materials . 6
10 Practical training parameters . 7
10.1 Training dives or in-water sessions .7
10.2 Instructor trainer responsibilities .7
10.3 Breathing gas limits .7
11 Qualification . 7
11.1 Knowledge .7
11.2 Skill evaluation .8
11.3 Course assistance .8
11.4 In-water sessions .8
11.5 Crossover requirements . .8
11.5.1 General .8
11.5.2 Prerequisites .8
11.5.3 Performance requirements . .9
12 Instructor trainers . 9
13 Proof of qualification . 9
Bibliography .10
iii
Foreword
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iv
Introduction
Rebreathers (i.e. breathing devices that recirculate some or all of the diver’s exhaled breath and replenish
any consumed oxygen to maintain a breathable mixture) are becoming much more widely available and
popular among divers. The market for rebreather diving has been constantly growing in recent years and
is now considered to be large enough that the need for standards on minimum training requirements
for training organizations is evident. Rebreathers allow divers to dive for longer and to greater depths.
Rebreathers can be hazardous if they are used improperly; divers have had fatal accidents due to incorrect
use of these devices. It is therefore important to specify training for diving with such devices.
Training organizations offering training that conforms with this document may exceed any of the
requirements in terms of the volume or complexity of training but should at least ensure the students master
all the skills and knowledge defined in this document.
v
International Standard ISO 24808:2024(en)
Recreational diving services — Requirements for rebreather
instructor training
1 Scope
This document specifies requirements for rebreather instructor training programmes which provide the
competencies required to be able to train rebreather divers.
This document specifies evaluation criteria for these competencies and specifies the requirements for four
levels of rebreather instructors.
This document specifies the requirements under which training is provided, in addition to the general
requirements for recreational diving service provision according to ISO 24803.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 24802-2, Recreational diving services — Requirements for the training of scuba instructors — Part 2: Level 2
ISO 24803, Recreational diving services — Requirements for recreational diving providers
ISO 24804, Recreational diving services — Requirements for rebreather diver training — No-decompression diving
ISO 24805, Recreational diving services — Requirements for rebreather diver training — Decompression
diving to 45 m
ISO 24806, Recreational diving services — Requirements for rebreather diver training — Decompression
diving to 60 m
ISO 24807, Recreational diving services — Requirements for rebreather diver training — Decompression diving
to 100 m
3 Terms and definitions
For the purposes of this document, the following terms and definitions ap
...