Unit of competency Outline

Date retreived
23/07/2026 1:46 PM AWST

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Perform underwater rigging work

Perform underwater rigging work

Unit of competency
National Code
DEFDV016B
State Code
AVV17
TGA Status
Replaced
DTWD Status
Replaced
Current Release Number
2.00
Current Release Date
24/01/2013
View on TGA
State Implementation and Classification
Approved Date
Field of Education
040329 - Scaffolding And Rigging
Original Release Date
Nominal Hours
0
Description
This unit covers the competency required to complete underwater rigging work.The unit also includes securing and moving submerged loads through the employment of blocks and tackle, chains, slings, and cordage.The diver will be required to establish secure lift points, to set rigging equipment between the load and the lifting platform, and to control the conduct of the lift. Attention must be given to safety during the lift particularly with regard to other divers and nearby surface vessels and/or structures. Consideration must also be given to the environmental impact of any work undertaken.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.
Notes
Elements and Performance Criteria
1. Prepare for underwater rigging operation
  • 1.1 Load metrics and worksite data are determined and analysed to determine the specific requirements for rigginggear.
  • 1.2 Work plan is developed consistent with the dive plan.
  • 1.3 Rigging gear is selected, inspected and prepared.
  • 1.4 Rigging gear is secured safely to/from the dive site.
  • 1.5 Access obstructions and other hazards are assessed and actionis taken toremove/reduce the risk.
2. Lift and handle submerged objects using mechanical advantage
  • 2.1 Lift points are established to secure the object to the lifting device.
  • 2.2 Work-safe area is established and the location and safety of divers is confirmed prior to commencing the lift.
  • 2.3 Lifting devices are operated within accepted load tolerances.
  • 2.4 Raised objects are anchored off to allow associated work to be undertaken in safety.
3. Conclude underwater rigging operations
  • 3.1 Environmental impact arising from the work task is minimised and waste products are recovered.
  • 3.2 Rigging gear is disassembled, de-serviced and stored after use.
  • 3.3 Log books are completed.
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.
Load metrics may include:
centre of gravity
composition
dimensions
lift points
weight
Worksite data may include:
depth
gradient
hazards
obstacles
Rigging gear may include:
air and hydraulic motors
blocks and tackle
bolts
chain hoist
chains
clamps
clocks and wedges
cradle timbers
equalising gear
eye bolts
feeler gauges
fibrous rope
fishplates
fixing brackets
jacks
karabiners and shackles
packers
puller systems
rigging screws
rollers
skates
skids
sliding shoes
slings
spreader beams
steel wire rope
turfers
turn buckles
winches
Selecting, inspecting and preparing rigging gear may include:
checking of test certificates
establishing end-brackets:
wedged end sockets
bulldog clips
eyed bolts
identifying load tolerances
testing functionality of:
karabiner and shackle hinge and sleeve checks
movement of blocks and tackle
start-up of air and hydraulic motors
Action to remove/reduce the risk may include:
erecting signage
using patrol/sentry craft
Lifting points may include:
single
multiple
Lifting devices include:
blocks and tackle
hydraulic/pneumatic lift
Operating liftingdevices may include:
lowering
raising
shifting laterally
Load tolerances may include:
safe working load (SWL)
working load limit (WLL)
Environmental impact may include:
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:
coiling and cordage
drying
logging work details into equipment logs
oiling/greasing
washing in fresh water
Critical aspects for assessment and evidence required to demonstrate competency in this unit
Assessment must confirm the ability to attend to personal and collective safety; and to consider the environmental impact as part of the dive plan.
Consistency in performance
Competency should be demonstrated during a physical rigging and lifting operation where the diver conducts the following lifts with mechanical devices:
1 x vertical lift to surface:
lift distance - at least 5 metres (object must breach surface)
depth - between 5 to 20 metres
weight - at least 250 k
Context of and specific resources for assessment
Context of assessment
Competency should be assessed in the ocean 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 diving, safety and accessory equipment; and rigging equipment.
Replaced By
State Code National Code Title Type
BBC84 DEFWDV016 Perform underwater rigging work Unit of competency
No information