4422 version 2
28-Jun-16
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DIVING - OCCUPATIONAL
Use self-contained rebreathing systems
while diving
level:
5
credit:
12
planned review date:
June 2002
sub-field:
Diving
purpose:
People credited with this unit standard are able to use selfcontained O2 and mixed gas rebreathing systems,
demonstrate knowledge of these breathing systems and
their associated hazards, and carry out post-dive equipment
checks as a diver or other member of the team.
entry information:
Prerequisites: Unit 6401, Provide first aid, Unit 6402, Provide
resuscitation level 2; Unit 4408, Dive in open water using
SCUBA equipment to 30 metres; Unit 4409, Execute surface
diving procedures; Unit 4411, Demonstrate emergency
procedures as stand-by diver on the surface and in the
water; Unit 4412, Complete underwater search, inspection,
and survey using SCUBA; Unit 4414, Complete in-water
decompression for routine dives and therapeutic operations;
Unit 4415, Recognise diving related ill-health conditions; or
demonstrate equivalent skills and knowledge; and 20 hours
logged open water diving experience are required prior to
commencing this unit standard and hold a current Medical
Clearance to dive and occupational-specific certificate of
competence.
accreditation option:
Evaluation of documentation and visit by NZQA and
industry.
moderation option:
A centrally established and directed national moderation
system has been set up by the Dive Industry Training
Organisation.
special notes:
1
Breathing equipment is used to the maximum depth
permitted for the type of equipment and gas being
used.
2
Industry criteria refer to diving practice complying with
the requirements of the Health and Safety in
Employment Act 1992 and subsequent regulations
 New Zealand Qualifications Authority 2016
4422 version 2
28-Jun-16
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DIVING - OCCUPATIONAL
Use self-contained rebreathing systems
while diving
relating to Occupational Diving; and comply with the
theory and practice requirements of the British Health
and Safety Executive (HSE) 1990 to ensure the
international standard is maintained. All practice also
complies with Accident Rehabilitation & Compensation
Insurance Corporation and Occupational Safety and
Health (OSH) guidelines.
Elements and Performance Criteria
element 1
Demonstrate knowledge of closed and semi-closed self-contained breathing systems and
their associated hazards.
performance criteria
1.1
Description of breathing systems covers closed and semi-closed self-contained
breathing systems and their associated hazards.
Range:
system operation, risks, hazards and the use of pure oxygen and
oxy-nitrogen mixtures.
 New Zealand Qualifications Authority 2016
4422 version 2
28-Jun-16
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DIVING - OCCUPATIONAL
Use self-contained rebreathing systems
while diving
1.2
Diving hazards are identified and precautions described to industry criteria.
Range:
impressed current cathodic protection, sonar transmissions,
propellers and thrusters, subsea electrical units maximum safe
depths, equivalent air depths and diving ills associated with mixed
gas diving.
element 2
Use rebreathing systems while diving.
performance criteria
2.1
Dives are to maximum depth allowed for gas mixtures and meet industry
criteria.
Range:
2.2
on pure O2, oxy-nitrogen mixtures.
Emergency drills relating to the use of rebreathing systems meet industry
criteria.
element 3
Carry out post-dive equipment checks as a diver or other member of the team.
performance criteria
3.1
Assessment of equipment on completion of dive is reported and identifies any
damage.
 New Zealand Qualifications Authority 2016
4422 version 2
28-Jun-16
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DIVING - OCCUPATIONAL
Use self-contained rebreathing systems
while diving
3.2
Equipment is maintained to industry criteria.
Range:
fresh water is used, lubricants are applied to metal surfaces and
connections, oral and/or nasal mouth pieces and metal surfaces
are disinfected.
Comments to:
Dive Industry Training Organisation
Unit Standard Revision
PO Box 160
WELLINGTON
by June 2002.
Please Note:
Providers must be accredited by the Qualifications Authority
before they can offer programmes of education and training
assessed against unit standards.
Accredited providers assessing against unit standards must
engage with the moderation system that applies to those unit
standards. [Please refer to relevant Plan ref: 0180]
 New Zealand Qualifications Authority 2016