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Elements and Performance Criteria

1. Prepare to use power tools under water
   • Determine specific requirements for power tools in accordance with work task, worksite and work object requirements
   • Develop a work plan consistent with dive plan
   • Select and inspect power tools, protective equipment and compressor to meet task requirements
   • Secure power tools, compressor, and associated leads and hoses for transport to/from dive site
   • Assess access obstructions and other hazards, and manage risks as required
2. Operate power tools under water
   • Secure power tools on self during dive for ease of accessibility, and lack of interference with mobility and dive equipment
   • Determine safe route for leads and hoses for dive activity
   • Determine work safe area and location and confirm safety of divers prior to commencing work task/s
   • Operate power tools underwater ensuring management of their associated hazards
   • Conduct operator maintenance at worksite on power tools, leads and hoses, as required
   • Disconnect power tools temporarily and render safe to evaluate work task in accordance with operational procedures
3. Operate compressor
   • Perform pre-start checks and connect hoses and leads in accordance with manufacturer instructions
   • Develop pressure gradually without surging and stabilise compressor to establish required output
   • Conduct routine operational checks, and diagnose and address any warning signs
   • Shut down compressor or conduct an emergency shut down procedure in accordance with dive plan
4. Conclude power tool operations
   • Minimise environmental impact arising from use of power tools and recover waste products in accordance with operational procedures
   • Undertake activity to de-service equipment and compressor after use
   • Complete equipment log book/s, as required

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: applying relevant industry standards, and organisational policies and procedures operating any four of the following power tools: power wrench, including changing sockets on site, tightening and loosening nuts drill, including drilling a hole in a steel plate and changing bits on site disc cutter, including cutting steel or concrete and changing disc on site jack hammer, including breaking concrete chainsaw, including cutting wooden beams 230 mm x 100 mm angle grinder, including cleaning and smoothing a fillet, chamfering a 12 mm plate and changing disc on site scrubber, including cleaning 2 m2 of horizontal and vertical surface operating a pneumatic or hydraulic compressor must include one or more of the following: connecting hoses and leads connecting to power supply adjusting output power switching compressor on/off.

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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: 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 power tool equipment, compressor, hoses and leads for the power tools operated: causes and remedies for surging control of output effects of temperature and compression ratio pressure/temperature relationships and effects on condensation (e.g. moisture and/or gas) methods of resolving problems principles of operation physics of operation relevant industry standards, and organisational policies and procedures relevant workplace hazards use of compressor use of power tools.

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