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 two separate occasions and include: applying relevant legislation, standards, and organisational policies and procedures completing underwater cutting and welding operations safely cutting 12 mm steel plates identifying and addressing relevant cutting/welding workplace hazards and problems operating generator to support welding tasks in an underwater environment operating thermal cutting and welding tools underwater planning for cutting and welding underwater stabilising a generator undertaking underwater welding activities including: preparing surface of work object for cut or weld controlling voltage and amperage of arc welding equipment turning on gas supplies adjusting ratios of oxygen and acetylene controlling pressure of oxy acetylene torch making cuts and welds ensuring minimal distortion to object inspecting and cleaning cuts and welds developing power gradually without surging using a number of thermal cutting and welding tools (non-load bearing) in an underwater environment work tasks: at depths between 5 metres and 20 metres on at least one night work task welding manual metal arc using electric welding equipment. |