DEFDV016B - Perform underwater rigging work

DEFDV016B
Perform underwater rigging work

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.

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.

Prerequisites

DEFDV001B Dive using self contained underwater breathing apparatus in open water to 30 metres.

Elements and Performance Criteria

ELEMENT	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.

Required Skills

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

Required Skills

check equipment

inspect equipment for serviceability and functionality

planning

rig equipment

Required Knowledge

determination of mass of submerged objects

dive equipment

dive physics

general occupational/diving safety awareness

marine hazards

oceanography

relevant references and Australian Standards

Evidence Required

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.

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.
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

Sectors

Not applicable.

Employability Skills

This unit contains employability skills.

Licensing Information

Not applicable.