4423 version 2
28-Jun-16
1 of 4
DIVING - OCCUPATIONAL
Dive in an operation using a wet bell to
a maximum depth of 50 metres
level:
5
credit:
6
planned review date:
June 2002
sub-field:
Diving
purpose:
People credited with this unit standard are able to dive in a
wet bell operation; act as a stand-by diver and tender in wet
bell operations; use a hot water suit; and demonstrate
knowledge of breathing systems and underwater hazards.
entry information:
Prerequisites: Unit 6401, Provide first aid and Unit 6402,
Provide resuscitation level 2, or demonstrate equivalent
skills and knowledge; 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.
 New Zealand Qualifications Authority 2016
4423 version 2
28-Jun-16
2 of 4
DIVING - OCCUPATIONAL
Dive in an operation using a wet bell to
a maximum depth of 50 metres
special notes:
Industry criteria refer to diving practice complying with the
requirements of the Health and Safety in Employment Act
1992 and subsequent regulations 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
Dive in a wet bell operation.
performance criteria
1.1
Wet bell dive is performed to industry technical and safety criteria.
Range:
bottom, intermediate depths.
1.2
In the event of failure of the surface supply, change over to on-board air supply
is completed to industry criteria.
1.3
Surface stand-by procedures for wet bell diving operations meet industry
criteria.
 New Zealand Qualifications Authority 2016
4423 version 2
28-Jun-16
3 of 4
DIVING - OCCUPATIONAL
Dive in an operation using a wet bell to
a maximum depth of 50 metres
element 2
Act as stand-by diver and tender in wet bell operations.
performance criteria
2.1
Diver is assisted by tending umbilical and/or lifeline.
2.2
Umbilical is followed from surface to diver.
Range:
direct to diver, to diver via wet bell.
2.3
Diver is recovered into wet bell and then to surface to meet industry criteria.
2.4
Description of diving from a dynamically positioned diving support vessel
identifies hazards and precautions to meet industry criteria.
element 3
Use a hot water suit.
performance criteria
3.1
Operation of suit control valve meets industry criteria.
3.2
Temperature change requests meet industry criteria.
3.3
Buoyancy control meets industry criteria.
Range:
problems, compensation.
 New Zealand Qualifications Authority 2016
4423 version 2
28-Jun-16
4 of 4
DIVING - OCCUPATIONAL
Dive in an operation using a wet bell to
a maximum depth of 50 metres
element 4
Demonstrate knowledge of breathing systems and underwater hazards.
performance criteria
4.1
Description of breathing systems covers closed and semi-closed breathing
apparatus to industry criteria.
Range:
4.2
system operation, hazards, and the use of oxy-nitrogen mixtures.
Diving hazards are identified, and precautions described to industry criteria.
Range:
impressed current cathodic protection, sonar transmissions,
propellers and thrusters, subsea electrical units.
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