EN ISO 24806:2023
(Main)Recreational diving services - Requirements for rebreather diver training - Decompression diving to 60 m (ISO 24806:2023)
Recreational diving services - Requirements for rebreather diver training - Decompression diving to 60 m (ISO 24806:2023)
This document specifies requirements for rebreather diver training programmes which provide the competencies required to perform dives to 60 m with a rebreather, using a breathing mixture containing helium and 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.
Dienstleistungen des Freizeittauchens - Anforderungen an die Ausbildung von Kreislaufgerätetauchenden - Dekompressionstauchen bis 60 m (ISO 24806:2023)
Dieses Dokument legt Anforderungen für Ausbildungsprogramme für Kreislaufgerätetauchende fest, die die erforderlichen Kompetenzen vermitteln, um Tauchgänge bis 60 m mit einem Kreislaufgerät unter Verwendung eines heliumhaltigen Atemgasgemisches durchzuführen, die obligatorische Dekompressionsstopps erfordern.
Dieses Dokument legt Bewertungskriterien für diese Kompetenzen fest.
Dieses Dokument legt die Anforderungen fest, unter denen die Ausbildung zusätzlich zu den allgemeinen Anforderungen für die Erbringung von Dienstleistungen im Bereich des Freizeittauchens nach ISO 24803 durchgeführt wird.
Services relatifs à la plongée de loisirs - Exigences concernant la formation des plongeurs à l’utilisation des recycleurs - Plongée avec décompression jusqu’à 60 m (ISO 24806:2023)
Le présent document spécifie les exigences relatives aux programmes de formation des plongeurs à l’utilisation des recycleurs, qui définissent les compétences requises pour effectuer des plongées avec recycleur jusqu’à 60 m en utilisant un mélange respiratoire contenant de l’hélium et nécessitant des paliers de décompression obligatoires.
Ce document spécifie également les critères d’évaluation de ces compétences.
Il précise les exigences applicables pour la formation, ainsi que les exigences générales relatives à la prestation de services de plongée de loisirs conformément à l’ISO 24803.
Storitve rekreativnega potapljanja - Zahteve za usposabljanje rekreativnih potapljačev - Dekompresijsko potapljanje do 60 m (ISO 24806:2023)
Ta dokument določa zahteve za programe usposabljanja potapljačev z dihalnim krogom. Zahteve določajo usposobljenost za izvajanje potopov do 60 m globine z dihalnim krogom z obveznimi dekompresijskimi postanki z dihalno mešanico, ki vsebuje helij. Dokument določa merila za ocenjevanje te usposobljenosti.
Prav tako določa pogoje, pod katerimi je izvedeno usposabljanje, poleg splošnih zahtev za izvajanje aktivnosti centrov za rekreativno potapljanje v skladu s standardom ISO 24803.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2023
Storitve rekreativnega potapljanja - Zahteve za usposabljanje rekreativnih
potapljačev - Dekompresijsko potapljanje do 60 m (ISO 24806:2023)
Recreational diving services - Requirements for rebreather diver training -
Decompression diving to 60 m (ISO 24806:2023)
Dienstleistungen des Freizeittauchens - Anforderungen an die Ausbildung von
Kreislaufgerätetauchenden - Dekompressionstauchen bis 60 m (ISO 24806:2023)
Services relatifs à la plongée de loisirs - Exigences concernant la formation des
plongeurs à l’utilisation des recycleurs - Plongée avec décompression jusqu’à 60 m (ISO
24806:2023)
Ta slovenski standard je istoveten z: EN ISO 24806:2023
ICS:
03.080.99 Druge storitve Other services
03.200.99 Drugi standardi v zvezi s Other standards relating to
prostim časom in turizmom leisure and tourism
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 24806
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2023
EUROPÄISCHE NORM
ICS 03.080.30; 03.100.30; 03.200.99
English Version
Recreational diving services - Requirements for rebreather
diver training - Decompression diving to 60 m (ISO
24806:2023)
Services relatifs à la plongée de loisirs - Exigences Dienstleistungen des Freizeittauchens - Anforderungen
concernant la formation des plongeurs à l'utilisation an die Ausbildung von Kreislaufgerätetauchenden -
des recycleurs - Plongée avec décompression jusqu'à Dekompressionstauchen bis 60 m (ISO 24806:2023)
60 m (ISO 24806:2023)
This European Standard was approved by CEN on 11 September 2023.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 24806:2023 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Annex A (informative) A–deviations . 4
European foreword
This document (EN ISO 24806:2023) has been prepared by Technical Committee ISO/TC 228 "Tourism
and related services" in collaboration with Technical Committee CEN/TC 329 “Tourism services” the
secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by April 2024, and conflicting national standards shall be
withdrawn at the latest by April 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 24806:2023 has been approved by CEN as EN ISO 24806:2023 without any modification.
Annex A
(informative)
A–deviations
A- deviation: National deviation due to regulations, the alteration of which is for the time being
outside the competence of the CEN/ CENELEC member.
This European standard does not fall under any Directive of the EU.
In the relevant CEN-CENELEC countries, these A-deviations are valid instead of the provisions of the
European standard, until they have been removed.
Clause Deviation
Scope French deviation
National regulation : "Code du Sport, Livre III : Pratique sportive, Titre II:
Obligations liées aux activités sportives, Section 3: Établissements qui
organisent la pratique ou dispensent l’enseignement de la plongée
subaquatique"
The scope of this standard is not compatible with the national regulation
mentioned above and its subsequent annexes related to rebreather diver
training programmes, competencies and specifies evaluation criteria for
these competencies.
Therefore, the whole standard is note applicable in France and the document
is not adopted as a national standard.
Normative French deviation
reference
In clause 2 “Normative references” the following documents, in whole or in
part, are normatively referenced in prEN ISO 24806 and are indispensable for
its application:
• 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 24805, Recreational diving services — Requirements for
rebreather diving training —decompression diving to 45 meters
All references above were not adopted and are not applicable in their entirety
in France.
INTERNATIONAL ISO
STANDARD 24806
First edition
2023-09
Recreational diving services —
Requirements for rebreather diver
training — Decompression diving to
60 m
Services relatifs à la plongée de loisirs — Exigences concernant la
formation des plongeurs à l’utilisation des recycleurs — Plongée avec
décompression jusqu’à 60 m
Reference number
ISO 24806:2023(E)
ISO 24806:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 24806:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Competencies . 4
5 Prerequisites for training . 4
5.1 General . 4
5.2 Minimum age . 4
5.3 Diving experience . 4
5.4 Health requirements . 4
6 Introductory information . 5
7 Theoretical knowledge . 5
7.1 Knowledge review . 5
7.2 Rebreather basics. 5
7.3 Function of rebreather components . 5
7.4 Breathing performance using a rebreather . 6
7.5 Rebreather assembly and checks . 6
7.6 Gas supply duration . 7
7.7 CO absorbent duration . 7
7.8 Rebreather pre-water entry checks . 7
7.9 Advanced decompression dive planning . 7
7.10 Dive conduct . 8
7.11 Identifying and reacting to potential issues . 9
7.12 Hypercapnia, hypoxia and hyperoxia . 10
7.13 Buddy and team diving procedures . 10
7.14 Rebreather maintenance . 10
7.15 Maintaining knowledge and skills . 11
8 Practical skills .11
8.1 Skills review . 11
8.2 General . 11
8.3 Pre-dive procedures . 11
8.4 Dive conduct .12
8.5 Emergency situations .13
8.6 Response to rebreather malfunctions . 13
8.7 Post-dive procedures . 14
9 Instructors .14
10 Training equipment and materials .14
10.1 Training equipment . 14
10.2 Training materials . 15
11 Practical training parameters .15
11.1 Training dives or in-water sessions . 15
11.2 Instructor responsibilities . 15
11.3 Rebreather dive leaders . 16
11.4 Breathing gas limits . 16
11.4.1 Closed-circuit rebreather . 16
11.4.2 Semiclosed-circuit rebreather. 16
12 E v a luat ion .17
12.1 Knowledge . 17
iii
ISO 24806:2023(E)
12.2 Skill evaluation . 17
12.3 Proof of qualification . 17
Annex A (informative) Gas density and gas mixtures .18
Annex B (normative) Student crossover training programmes.19
Bibliography .20
iv
ISO 24806:2023(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 228, Tourism and related services, in
collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/
TC 329, Tourism services, in accordance with the Agreement on technical cooperation between ISO and
CEN (Vienna Agreement).
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
v
ISO 24806:2023(E)
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 for training
organizations on minimum training requirements is evident. Rebreathers allow divers to dive for
longer and to greater depths. Such depths can go beyond 30 m and can therefore require mandatory
decompression stops. If rebreathers are used improperly, they can be hazardous; 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.
vi
INTERNATIONAL STANDARD ISO 24806:2023(E)
Recreational diving services — Requirements for
rebreather diver training — Decompression diving to 60 m
1 Scope
This document specifies requirements for rebreather diver training programmes which provide
the competencies required to perform dives to 60 m with a rebreather, using a breathing mixture
containing helium and 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.
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 24801-3, Recreational diving services — Requirements for the training of scuba divers — Part 3: Level 3
— Dive leader
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 24805, Recreational diving services — Requirements for rebreather diver training — Decompression
diving to 45 m
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
rebreather
apparatus that has a supply of gas carried by the diver, allowing the diver to breathe under water
which enables the diver to inspire gas from a facepiece connected to a counterlung and to pass exhaled
gas through a carbon dioxide absorption material before it is re-breathed from the counterlung and
inspired partial pressure of the gases within the apparatus remain within acceptable physiological
limits so that gas is thus recirculated within the apparatus
Note 1 to entry: A rebreather can also be called a self-contained rebreathing apparatus.
Note 2 to entry: A facepiece can be a mouthpiece assembly, a half mask, a full-face mask or a helmet.
[SOURCE: EN 14143:2013, 3.1, modified — Note 1 to entry modified and Note 2 to entry added. This
content has been reproduced with the permission of CEN. Copyright remains with CEN.]
ISO 24806:2023(E)
3.2
rebreather type
primary rebreather design
EXAMPLE Closed-circuit rebreather (CCR), manually controlled closed-circuit rebreather (mCCR),
electronically controlled closed-circuit rebreather (eCCR), semiclosed-circuit rebreather (SCR), manually
controlled SCR (mSCR), electronically controlled SCR (eSCR), hybrid closed-circuit rebreather (hCCR).
3.3
rebreather unit
type of rebreather (3.1) having consistent controls, displays and configuration over several rebreather
models (3.4), where the operation is essentially the same from rebreather model to rebreather model
3.4
rebreather model
specific individual design of rebreather (3.1) made by a manufacturer
3.5
breathing gas
gas present in the breathing loop (3.12) inspired by the diver
3.6
supply gas
gas present in a cylinder which can be added to the breathing loop (3.12)
3.7
bailout gas
gas present in a cylinder that can be breathed directly by the diver
3.8
trimix
gas comprising a specified mixture of oxygen, helium and nitrogen, capable of supporting human life
under appropriate diving or hyperbaric conditions
Note 1 to entry: This includes manufactured gas mixtures made from combinations of pure oxygen, pure helium
and pure nitrogen, with or without compressed air.
[SOURCE: EN 14143:2013, 3.20 — This content has been reproduced with the permission of CEN.
Copyright remains with CEN.]
3.9
PO
partial pressure of oxygen in a gas mixture
Note 1 to entry: This usually refers specifically to the breathing-gas mixture inhaled by a diver.
3.10
set-point
PO set-point
PO value that is used by a control system to determine when a solenoid valve injects oxygen into the
breathing loop (3.12)
3.11
respiratory minute volume
RMV
product of the tidal volume and breathing frequency measured in litres per minute
[SOURCE: EN 14143:2013, 3.10 — This content has been reproduced with the permission of CEN.
Copyright remains with CEN.]
ISO 24806:2023(E)
3.12
breathing loop
portion of a rebreather (3.1) through which gas circulates, usually consisting of a mouthpiece, breathing
hose(s), counterlung(s), non-return valves and a CO absorbent canister
3.13
scrubber
canister in the breathing loop (3.12) containing CO absorbent
3.14
confined water
swimming pool with a depth appropriate to the activity or body of water, offering similar conditions
with regard to visibility, depth, water movement and access
[SOURCE: ISO 24801-2:2014, 3.5]
3.15
open water
body of water significantly larger than a swimming pool, offering conditions typical of a natural body
of water
[SOURCE: ISO 24801-2:2014, 3.6]
3.16
limited open water
open water (3.15) no deeper than 20 metres, with no appreciable water movement and visibility that is
sufficient to allow effective student supervision and skill development
3.17
service provider
entity (individual or organization), including any individual acting on behalf of such an entity, which
offers one or more of the following services:
— introductory diving activities;
— snorkelling excursions;
— provision of training and education;
— organized and guided diving for qualified divers;
— rental of diving equipment.
[SOURCE: ISO 24803:2017, 3.1]
3.18
safety stop
non-mandatory decompression stop (3.19) near the surface prior to surfacing
3.19
decompression stop
mandatory stop during ascent from depth prior to surfacing
3.20
decompression diving
diving with mandatory decompression stops (3.19)
3.21
delayed surface marker buoy
DSMB
surface marker buoy that can be deployed by a diver from underwater
ISO 24806:2023(E)
4 Competencies
The training programme shall ensure that students are qualified to independently plan and conduct
dives requiring mandatory decompression stops using the specific rebreather unit for which the diver
has received training.
Divers qualified in accordance with this document are competent to dive with a suitably qualified
buddy to 60 m using a rebreather with a supply gas containing:
— a minimum of 15 % oxygen;
— sufficient helium to control narcosis and to ensure a breathing gas density of less than 6,3 g/l.
In order to be deemed qualified to dive with a specific rebreather unit other than the one that the diver
has received initial training for, a diver will need further unit-specific training.
The training programme shall ensure that the student has a full understanding of any theoretical
concepts or skills applicable to the rebreather type, rebreather unit and rebreather model they will
use. Students shall be provided with an overview of any information that is not specific to their
rebreather, but this only needs to be informative in nature so that they are aware of the general possible
configurations that other divers could use.
Student crossover training programmes shall be carried out in accordance with Annex B.
5 Prerequisites for training
5.1 General
The service provider shall ensure that the student fulfils the following prerequisites to take part in the
training course envisaged.
In order to participate in a training programme in accordance with this document, students shall be
qualified in accordance with ISO 24805.
5.2 Minimum age
The minimum age to participate in a training programme in accordance with this document shall be
18 years.
5.3 Diving experience
Students shall have logged at least 50 dives with a minimum of 50 h using a rebreather. At least 25
logged dives and 25 h shall have been made with the same specific rebreather unit to be used in the
course. A minimum of 10 rebreather dives shall have been made to a depth of at least 30 m requiring
decompression stops.
5.4 Health requirements
Documented evidence shall be obtained that the student has been medically screened as suitable for
recreational diving by means of an appropriate questionnaire or medical examination.
NOTE See Reference [3] for an example of a medical questionnaire and accompanying guidance to physicians.
In case of doubt, the training service provider shall refer students to proper medical resources. If the
student is not examined by a physician, the student shall be obliged to confirm by signature that he or
she has understood written information given by the instructor on diseases and physical conditions
which can pose diving-related risks.
Students shall be advised of the importance of appropriate regular medical examinations.
ISO 24806:2023(E)
6 Introductory information
Information in accordance with ISO 24803 shall be made available to the students prior to or during the
first class or meeting.
In particular, the students shall be informed of the limits of their training and qualification as specified
in accordance with Clause 4.
7 Theoretical knowledge
7.1 Knowledge review
The training programme shall ensure that knowledge in accordance with ISO 24805 is reviewed by
assessing the students (e.g. by means of an exam or quiz) before teaching new knowledge. Where
knowledge gaps are id
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...