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Elements and Performance Criteria

1. Prepare for underwater rigging operation
   • Identify load metrics and worksite data to meet task requirements
   • Develop work plan consistent with dive plan in accordance with organisational procedures and task requirements
   • Select, inspect and prepare rigging gear in accordance with safe lifting weight limits and work plan
   • Secure rigging gear for safe transport to/from dive site
   • Identify obstructions and other lift hazards to determine risks and to manage risk control measures in accordance with dive plan
2. Lift and handle submerged objects using mechanical advantage
   • Identify lift points to secure object to lifting device in accordance with safe lifting weight limits
   • Determine a safe work area and confirm location of other divers and nearby surface vessels and/or structure prior to commencing lift, in accordance with work plan
   • Operate lifting devices within accepted load tolerances
   • Ensure lifting devices are anchored off raised objects in accordance with operational and safety procedures
3. Complete underwater rigging operations
   • Minimise environmental impact arising from work task and recover waste products
   • Disassemble, inspect, de-service and store rigging gear
   • Complete required documentation and records, in accordance with organisational 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.

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Performance Evidence

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: analysing constraints of object to be lifted to determine technique applying relevant legislation, standards, and organisational policies and procedures applying underwater risk control measures and work plan requirements calculating load parameters conducting one vertical lift to the surface with mechanical devices constructing rigs including: assembling equipment to ensure load can be lifted with available equipment determining load capacity of components developing underwater rigging work plan planning underwater rigging work preparing accurate reports and required documentation rigging load within safe lifting weight limits.

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Knowledge Evidence

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: determination of mass of submerged objects dive equipment dive physics dive physiology and medicine including: heat and cold illnesses compression illnesses decompression illnesses diving descent and ascent techniques equipment inspection and checking specifications 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 lifting and rigging equipment calculations, techniques and specifications oceanography relevant legislation, standards, and organisational policies and procedures relevant safe lifting weight limits relevant risk mitigation organisational procedures including: relevant marine hazards and risk control measures relevant rigging workplace hazards.

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