Unit of competency Outline

Date retreived
22/07/2026 9:57 AM AWST

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Complete a dive using Enriched Air Nitrox

Complete a dive using Enriched Air Nitrox

Unit of competency
National Code
SISOSCB317A
State Code
D6463
TGA Status
Replaced
DTWD Status
Replaced
Current Release Number
2.00
Current Release Date
28/11/2011
View on TGA
State Implementation and Classification
Approved Date
03/08/2012
Field of Education
092101 - Sport And Recreation Activities
Original Release Date
03/08/2012
Nominal Hours
20
Description
This unit describes the performance outcomes, skills and knowledge required to plan and perform an EANx dive under supervision. This unit also focuses on disassembling and maintaining equipment used for EANx dives.
Notes
Elements and Performance Criteria
1. Plan an EANx dive.
  • 1.1. Identify the requirements of EANx use and associated hazards.
  • 1.2. Prepare EANx dive plan according to industry technical and safety criteria, relevant legislation and organisational policies and procedures.
  • 1.3. Select a suitable dive site according to industry technical and safety criteria, relevant legislation and organisational policies and procedures.
2. Select equipment.
  • 2.1. Select blend and equipment according to industry technical and safety criteria.
  • 2.2. Perform pre dive checks and maintenance of EANx equipment according to industry technical and safety criteria, manufacturer's recommendations and organisational policies and procedures.
3. Dive using EANx.
  • 3.1. Complete EANx dive according to dive plan, EANx criteria and industry technical and safety criteria.
  • 3.2. Monitor depth and time throughout dive.
  • 3.3. Take remedial action to avoid hazards.
4. Disassemble and maintain equipment.
  • 4.1. Maintain positive pressure in the cylinder to avoid entry of atmospheric air.
  • 4.2. Disassemble regulators and gauges according to industry technical and safety criteria.
  • 4.3. Undertake service and maintenance of equipment with parts compatible with elevated oxygen mix according to industry technical and safety criteria.
5. Evaluate EANx dive.
  • 5.1. Evaluate relevant aspects of the EANx dive.
  • 5.2. Identify improvements for future EANx dives.
The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.
Requirements may include:
approved cylinders
colour coding
dive planning
stamping
compliance
adequate filtering
compatible equipment and materials.
Hazards may include:
hypothermia
group management hazards
equipment contamination
oxygen toxicity
explosion risk
decompression illness
EANx blend analysis.
EANx dive plan may include:
objectives
date, time and duration of dive
site, equipment and resources
safety and emergency procedures
experience and or expertise of dive team
buoyancy
dive log
no-decompression limits
gas plan
calculation of partial oxygen to determine oxygen
risk management plan.
Industry technical and safety criteria may include:
British Sub-Aqua Club (BSAC)
Professional Association of Diving Instructors (PADI)
SCUBA Schools International (SSI).
Relevant legislation may include:
occupational health and safety
permits or permission for access
environmental regulations
marine regulations.
Organisational policies and procedures may include:
occupational health and safety
communication protocols
EANx dive and gas plans
code of ethics
manufacturer's recommendations
minimal impact codes
EANx criteria.
Blend and equipment may include:
cylinder
regulator
gauges and accessories
valves
oxygen compatibility or clean
labelling
blend analysis.
Pre dive checks may include:
dive and gas plans
the maximum depth for the breathing gas and loss of breathing gas procedures
buddy separation procedures.
Maintenance may include:
cylinder specifications
coding
stamping
safety log
oxygen cleaning of equipment.
Relevant aspects may include:
objectives
planning process
activity site
weather
equipment selection
clothing selection
food selection
instructional content
instructional technique
assessment technique
group feedback
directing techniques
rescue techniques employed.
The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.
Overview of assessment

Critical aspects for assessment and evidence required to demonstrate competency in this unit
Evidence of the following is essential:
applies relevant process to plan for EANx diving, complete safely checks and maintain and disassemble EANx equipment
calculates gas mixtures and no decompression limits according to industry technical and safety criteria, relevant legislation and organisational policies and procedures
determines and negotiates specific EANx requirements, hazards and factors affecting diving with EANx
evaluates and reflects on own EANx diving performance to identify strengths, weaknesses and areas that need improvement.
Context of and specific resources for assessment
Assessment must ensure participation in multiple EANx diving activities to demonstrate competency and consistency of performance.
Assessment must also ensure access to:
resources and information to plan and select appropriate equipment for EANx diving
an open water site suitable for EANx diving
a suitable diving boat, if required
SCUBA equipment and specific EANx diving equipment.
Method of assessment
A range of assessment methods should be used to assess practical skills and knowledge. The following examples are appropriate for this unit:
oral or written questioning to assess knowledge of EANx requirements, gas mixtures, and hazards associated with diving using EANx
observation of safe participation and handling of EANx equipment throughout diving process
third-party reports from a supervisor detailing performance.
Holistic assessment with other units relevant to the industry sector, workplace and job role is recommended.
Replaces
State Code National Code Title Type
C6283 SROSCB025A Complete a dive using Enriched Air Nitrox (EANx) Unit of competency
Replaced By
State Code National Code Title Type
OBE80 SISOSCB008 SCUBA dive using Enriched Air Nitrox Unit of competency