PUADEFDV005B - Dive using closedcircuit breathing apparatus (N2O2) in open water to a maximum depth of 40 metresPUADEFDV005BDive using closedcircuit breathing apparatus (N2O2) in open water to a maximum depth of 40 metres

Unit Descriptor

This unit covers the competency required to dive using closed-circuit breathing apparatus (CCBA) (N2O2) in an open water environment to a maximum depth of 40 metres.

This unit specifically covers those aspects of performance unique to CCBA (N2O2), such as operating the N2O2 compressor/hand-booster pump, inspecting and operating CCBA (N2O2) equipment, and conducting CCBA (N2O2) specific contingency drills.

Application of the Unit

The application of this unit in the workplace - the environments, complexities and situations involved - will be written during Phase II of the Review of the PUA00 Public Safety Training Package.

This text will be useful for the purposes of job descriptions, recruitment advice or job analysis; where possible, it will not be too job specific to allow other industries to import it into other Training Packages, where feasible.

Prerequisite Unit/

PUADEFDV001B Dive using self contained underwater breathing apparatus in open water to 30 metres

SROSCB008A Inspect and fill SCUBA cylinders

Employability Skills

This unit contains employability skills.

Elements describe the essential outcomes of a Unit of Competency.

Performance Criteria describe the required performance needed to demonstrate achievement of the element. Where bold italicised text is used, further information is detailed in the Required Skills and Knowledge and/or the Range Statement. Assessment of performance is to be consistent with the Evidence Guide.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

Assessment must confirm the ability to:

arrange for others to check equipment

conduct inwater checks

handle nonfunctional equipment items

implement contingency and emergency drills such as:

buddy breathing

ditching drills

unconscious companion diver drills

maintain equipment during the dive

prepare equipment for the dive including charging of cylinders

recover and clear mask and mouthpiece

refurbish equipment postdive

safely enter and exit the water appropriate to the launch platform, equipment and conditions

switch from primary to the reserve air system.

Consistency in performance

Competency will be demonstrated over a minimum of 15 dives with the diver diving to a depth not greater than 40 m using CCBA (N2O2) in open water that includes the following requirements:

day and night

oceans

seas, lakes and rivers

subsurface conditions:

a range of surface and subsurface hazards

current (0–2 knots)

temperature (0 degrees +)

visibility (0 metre +).

Table 1 (below) outlines the minimum dives required by this Unit of Competency.

Table 1

Context of and specific resources for assessment

Context of assessment

Competency will be assessed in the ocean over a range of oceanic, diurnal and nocturnal environments, supported by questioning on shore or aboard vessels.

When practicable, assessment should relate to the diver’s vocational focus.

Specific resources for assessment

Access to a complete range of CCBA (N2O2) diving, safety and accessory equipment.

Guidance information for assessment

Information that will assist or guide assessment will be written during Phase II of the Review of the PUA00 Public Safety Training Package.

RANGE STATEMENT

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 in the Performance Criteria is detailed below.

Open water environment may include

Day or night

Oceans, seas, lakes and rivers

Sub-surface conditions:

current (0-2 knots)

visibility (0 metre +)

temperature (0 degrees +)

surface and sub-surface hazards such as:

anchor drop zones cathodic protection devices

electrical cabling

inlets and sonar/radio frequency hazards

marine animals piers and jetties

pipelines

propellers/thrusters

pollutants

trapping hazards such as:

beams

culverts

gates

grottoes and caves

intakes and out-falls

nets

safety, anchor and communications lines

sewers

sluices

submerged ships

vehicles and structures

vessel rocking and associated movement

CCBA (N2O2) includes

N2O2 cylinder

Counter-lung

Emergency cylinder

Facemask/mouthpiece

Scrubber material

Associated equipment includes

Hoses

Pumps

Protective equipment may include

Boots

Gloves

Goggles

Operator level maintenance may include

Checking existing pressure in cylinders with pressure gauge

Conducting charging in (N2O2) clean environment

Following correct charging procedure and charging rate

Operating high pressure charging panels

Dive contingencies may include

Buddy breathing

Companion diver

Flooded mask

Fouled supply

Hose blockage/choking

Hose rupture

Partial pressure anomalies

Set to 40 bar

Trouble drill

Co-requisite Unit/

Nil