Commercial diving/Safe use of hand and power tools underwater

Relevance: Scuba diving (partial: hand tools), Surface supplied diving (partial: + power tools), Surface oriented wet bell diving (full).

Required outcomes:
 * 1) Explain the principles of safe use of hand tools underwater
 * 2) Discuss the safe and effective use of power tools underwater
 * 3) Discuss the safe and effective use of oxy-arc Cutting
 * 4) Discuss the safe and effective use of HP water jetting
 * 5) Discuss the safe and effective use of LP abrasive cleaning
 * 6) Describe the principles and practice of wet welding with reference to safety and setup and the limitations of application