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Evidence Guide: DEFWDV013 - Employ air-lift devices underwater

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

DEFWDV013 - Employ air-lift devices underwater

What evidence can you provide to prove your understanding of each of the following citeria?

Prepare for underwater air-lift operation

  1. Identify and analyse load metrics and worksite data to determine specific requirements for air-lift bags
  2. Develop a work plan consistent with dive plan
  3. Select, inspect and prepare air-lift bags in accordance with manufacturer specifications and safe weight limits
  4. Secure air-lift bags to/from dive site
  5. Assess obstructions and other underwater hazards to determine risks and manage risk control measures in accordance with dive plan
Identify and analyse load metrics and worksite data to determine specific requirements for air-lift bags

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Develop a work plan consistent with dive plan

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Select, inspect and prepare air-lift bags in accordance with manufacturer specifications and safe weight limits

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Secure air-lift bags to/from dive site

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Assess obstructions and other underwater hazards to determine risks and manage risk control measures in accordance with dive plan

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Operate air-lift devices

  1. Secure air-lift bags to object’s lift point/s
  2. Determine a safe work area, confirm location of other divers and nearby vessels and/or structures prior to commencing and during air-lift operation, in accordance with work plan
  3. Inflate air-lift bags in accordance with work plan
  4. Control buoyancy and movement in accordance with work plan
Secure air-lift bags to object’s lift point/s

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Determine a safe work area, confirm location of other divers and nearby vessels and/or structures prior to commencing and during air-lift operation, in accordance with work plan

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Inflate air-lift bags in accordance with work plan

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Control buoyancy and movement in accordance with work plan

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Complete air-lift operations

  1. Minimise environmental impact arising from work task and recover waste products
  2. Carry out de-servicing and storage requirements for air-lift bags
Minimise environmental impact arising from work task and recover waste products

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Carry out de-servicing and storage requirements for air-lift bags

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Prepare for underwater air-lift operation

1.1

Identify and analyse load metrics and worksite data to determine specific requirements for air-lift bags

1.2

Develop a work plan consistent with dive plan

1.3

Select, inspect and prepare air-lift bags in accordance with manufacturer specifications and safe weight limits

1.4

Secure air-lift bags to/from dive site

1.5

Assess obstructions and other underwater hazards to determine risks and manage risk control measures in accordance with dive plan

2

Operate air-lift devices

2.1

Secure air-lift bags to object’s lift point/s

2.2

Determine a safe work area, confirm location of other divers and nearby vessels and/or structures prior to commencing and during air-lift operation, in accordance with work plan

2.3

Inflate air-lift bags in accordance with work plan

2.4

Control buoyancy and movement in accordance with work plan

3

Complete air-lift operations

3.1

Minimise environmental impact arising from work task and recover waste products

3.2

Carry out de-servicing and storage requirements for air-lift bags

Required Skills and Knowledge

ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Prepare for underwater air-lift operation

1.1

Identify and analyse load metrics and worksite data to determine specific requirements for air-lift bags

1.2

Develop a work plan consistent with dive plan

1.3

Select, inspect and prepare air-lift bags in accordance with manufacturer specifications and safe weight limits

1.4

Secure air-lift bags to/from dive site

1.5

Assess obstructions and other underwater hazards to determine risks and manage risk control measures in accordance with dive plan

2

Operate air-lift devices

2.1

Secure air-lift bags to object’s lift point/s

2.2

Determine a safe work area, confirm location of other divers and nearby vessels and/or structures prior to commencing and during air-lift operation, in accordance with work plan

2.3

Inflate air-lift bags in accordance with work plan

2.4

Control buoyancy and movement in accordance with work plan

3

Complete air-lift operations

3.1

Minimise environmental impact arising from work task and recover waste products

3.2

Carry out de-servicing and storage requirements for air-lift bags

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria on at least one occasion and include:

applying centre of gravity of lifted object

applying relevant legislation, standards and organisational policies and procedures

applying underwater risk control measures and work plan requirements

controlling neutrally buoyant objects

coordinating with other operators during lift

demonstrating air-lift operations with manually inflated air bags including:

1 x vertical lift to surface

1 x lateral lift

determining hydrodynamics of object as it is raised through the water

developing underwater air-lift work plan

rigging and de rigging air-lift equipment.

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria and include knowledge of:

calculations to determination hydrodynamics, centre of gravity and mass of submerged objects

characteristics and employment of airlift bags

dive equipment

dive physics

dive physiology and medicine including:

heat and cold illnesses

compression illnesses

decompression illnesses

diving descent and ascent techniques

general diving safety awareness including:

diving in harbours

diving in tidal waters, currents and tides

diving on and/or near a ship’s bottom

lost/separated

entrapment/foul lines

marine animal threats

pollution/weeds

working in confined spaces

oceanography

relevant manufacturer specifications

relevant marine workplace hazards

relevant legislation, standards and organisational policies and procedures.

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment.

Non-essential conditions may be found in the Companion Volume Implementation Guide.