Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners

DEFDV017B Mapping and Delivery Guide
Employ thermal cutting and welding tools (non-load bearing) in an underwater environment

Version 1.0
Issue Date: April 2024


Qualification -
Unit of Competency DEFDV017B - Employ thermal cutting and welding tools (non-load bearing) in an underwater environment
Description This unit covers the competency required to employ thermal cutting and welding tools in an underwater environment. This includes the operation (from the surface) of the generator.The unit also includes selecting the appropriate tools for the work task and inspecting them for serviceability. The diver must ensure the tools are secured on own body throughout the dive, and correctly operate the tools with particular attention to safety.Competence will need to be demonstrated in the surface operation of the electrical generator or gas cylinders supplying the tools.The diver will be responsible for the recovery of any waste arising from the work task to ensure the preservation of the environment. Finally, the tools, generator and gas cylinders must be de-serviced and stored appropriately for ongoing use.Note: This Unit of Competency relates, in part, to the existing standards of the Australian Diver Accreditation Scheme (ADAS). All information was correct at the time of development of this Unit of Competency; however, any diver seeking ADAS accreditation should consult ADAS and not rely on the information contained in this unit.
Employability Skills This unit contains employability skills.
Learning Outcomes and Application As agreed in the creation of this Training Package, applications for units transferred from the PUA00 Public Safety Training Package will be developed as part of continuous improvement plans, and taking into account the change in Unit of Competency format as detailed in templates for Streamlined Training Packages.
Duration and Setting X weeks, nominally xx hours, delivered in a classroom/online/blended learning setting.
Prerequisites/co-requisites DEFDV001B Dive using self contained underwater breathing apparatus in open water to 30 metres.DEFDV008B Employ hand tools in an underwater environment.
Competency Field
Development and validation strategy and guide for assessors and learners Student Learning Resources Handouts
Activities 		Slides
PPT 		Assessment 1 Assessment 2 Assessment 3 Assessment 4
Elements of Competency Performance Criteria              
Element: Prepare for cutting and welding underwater
  • Work task, worksite data and work object (including composition and condition) are determined and analysed to determine the specific requirements for thermal cutting and welding tools.
  • Work plan is developed consistent with the dive plan.
  • Thermal cutting and welding tools, and protective equipment appropriate to the task are selected, inspected and prepared.
  • Electrical generator and associated leads are selected, inspected and prepared.
  • Oxy-acetylene gas cylinders and associated hoses are selected, inspected and prepared.
  • Thermal cutting and welding tools, the generator, oxy-acetylene gas cylinders, and associated leads and hoses are secured safely to/from the dive site.
  • Access obstructions and other hazards are assessed and action is taken to remove/reduce risk.
       
Element: Operate thermal cutting and welding tools underwater
  • Thermal cutting and welding tools are secured on self during the dive for ease of accessibility and lack of interference with mobility and dive equipment.
  • Safe routes for leads and hoses to the worksite are established.
  • Work-safe area is established and location and safety of divers is confirmed prior to commencing work tasks.
  • Surface of the work object is prepared for the cut or weld.
  • Voltage and amperage of arc-welding equipment is controlled.
  • Gas supplies are turned on and ratios of oxygen and acetylene are set and adjusted.
  • Pressure of oxy-acetylene torch is controlled.
  • Cuts and welds are made ensuring minimal distortion to the object.
  • Employment hazards of cutting and welding tools are managed.
       
Element: Thermal cutting and welding tools are temporarily disconnected and rendered safe to evaluate the work task.
       
Element: Cuts and welds are inspected and cleaned.
       
Element: Operate the generator
  • Pre-start checks are performed and leads are connected.
  • Power is developed gradually without surging and generator is stabilised and trimmed to required work output.
  • Routine operational checks are conducted and warning signs are diagnosed and addressed.
  • Generator is shut down.
  • Emergency shut-down drills are conducted..
       
Element: Conclude underwater cutting and welding operations
  • Environmental impact arising from use of thermal cutting and welding tools is minimised and waste products are recovered.
  • Thermal cutting and welding tools, the generator, gas cylinders and associated leads and hoses, and protective equipment are de-serviced after use.
       


Evidence Required

List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.

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

Assessment must confirm the ability to:

cut a12 mm steel plate using a thermal arc or oxy arc cutting torch

weld together two pieces of approximately 12 mm steel plate underwater using electric welding equipment to produce a fillet weld

attend to personal and collective safety

consider the environmental impact as part of the dive plan.

Consistency in performance

Competency should be demonstrated during a number of work tasks where:

the depth is between 5 metres and 20 metres

at least one night work task is undertaken.

Context of and specific resources for assessment

Context of assessment

Competency should be assessed in the ocean.

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

Specific resources for assessment

Access to a dive location, and thermal cutting and welding equipment.

Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assignment, checklist) and due date here

Assessment task 1: [title]      Due date:

(add new lines for each of the assessment tasks)

Assessment Tasks

Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.

This describes the essential skills and knowledge and their level, required for this unit.

Required Skills

ability to dive

cut steel plates

diagnose equipment faults

operate a generator

take remedial actions

undertake general operator maintenance

weld

Required Knowledge

control of output

dangers of trapped gas and its avoidance

dive equipment

dive physics

equipment (generator, thermal cutting and welding, tools, hoses and leads)

general occupational/diving safety awareness

methods of resolving problems

oceanography

physics of operation

principles of operation

relevant references and Australian Standards

thermal cutting and welding on land

work hazards

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.

Work tasks may include:

cutting

gouging

heating

welding

Worksite data may include:

current

depth

gradient

hazards

obstacles

Work object may include:

anchorage

pipe

sheet (hull)

support/strut

Composition may include:

aluminium

high and low alloy steels

high and low carbon steels

mild steel

stainless steel

Thermal cutting and welding tools may include:

oxy-torch

arc-welder

Protective equipment may include:

boots

eye protection

gloves

hood/helmet

Selecting, inspecting and preparing thermal cutting and welding tools may include:

inspection of stick

neck/mouth of oxy-torch

regulation of amperage and voltage

security of earth (bull-dog) lead

Selecting, inspecting and preparing the generator may include:

checking fluids

fuelling

pre-start checks

Selecting, inspecting and preparing the oxy-acetylene gas cylinders may include:

checking gas lines

checking gas pressures and mixing ratios

physical security of bottles

Hazards may include:

danger zone of objects being worked on

impact on dive equipment (e.g. hoses, gauges, communications)

release of fuels and associated chemical contaminants resident at the worksite

retinal damage

shock and burn

trapped air explosions

Action to remove/reduce the risk may include:

erecting signage

using patrol/sentry craft

Routine operational checks may include:

fuel

fluids

pressure

temperature

Warning signs may include:

feed variations

rise/fall in temperature

smoke

surging (rise/fall in power)

unusual noise

unusual smell (e.g. oil)

Environmental impact includes:

contamination of surrounding water (e.g. leaking oil)

physical damage to reef and associated floor eco-systems (e.g. coral)

visual pollution of waste material (e.g. concrete and metal parts)

De-servicing may include:

drying

logging work details into equipment logs

oiling/greasing

refilling

re-fuelling

washing in fresh water

Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.

Observation Checklist

Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice Yes No Comments/feedback
Work task, worksite data and work object (including composition and condition) are determined and analysed to determine the specific requirements for thermal cutting and welding tools. 
Work plan is developed consistent with the dive plan. 
Thermal cutting and welding tools, and protective equipment appropriate to the task are selected, inspected and prepared. 
Electrical generator and associated leads are selected, inspected and prepared. 
Oxy-acetylene gas cylinders and associated hoses are selected, inspected and prepared. 
Thermal cutting and welding tools, the generator, oxy-acetylene gas cylinders, and associated leads and hoses are secured safely to/from the dive site. 
Access obstructions and other hazards are assessed and action is taken to remove/reduce risk. 
Thermal cutting and welding tools are secured on self during the dive for ease of accessibility and lack of interference with mobility and dive equipment. 
Safe routes for leads and hoses to the worksite are established. 
Work-safe area is established and location and safety of divers is confirmed prior to commencing work tasks. 
Surface of the work object is prepared for the cut or weld. 
Voltage and amperage of arc-welding equipment is controlled. 
Gas supplies are turned on and ratios of oxygen and acetylene are set and adjusted. 
Pressure of oxy-acetylene torch is controlled. 
Cuts and welds are made ensuring minimal distortion to the object. 
Employment hazards of cutting and welding tools are managed. 
 
 
Pre-start checks are performed and leads are connected. 
Power is developed gradually without surging and generator is stabilised and trimmed to required work output. 
Routine operational checks are conducted and warning signs are diagnosed and addressed. 
Generator is shut down. 
Emergency shut-down drills are conducted.. 
Environmental impact arising from use of thermal cutting and welding tools is minimised and waste products are recovered. 
Thermal cutting and welding tools, the generator, gas cylinders and associated leads and hoses, and protective equipment are de-serviced after use. 

Forms

Assessment Cover Sheet

DEFDV017B - Employ thermal cutting and welding tools (non-load bearing) in an underwater environment
Assessment task 1: [title]

Student name:

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I declare that the assessment tasks submitted for this unit are my own work.

Student signature:

Result: Competent Not yet competent

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Assessor name:

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Assessment Record Sheet

DEFDV017B - Employ thermal cutting and welding tools (non-load bearing) in an underwater environment

Student name:

Student ID:

Assessment task 1: [title] Result: Competent Not yet competent

(add lines for each task)

Feedback to student:

 

 

 

 

 

 

 

 

Overall assessment result: Competent Not yet competent

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