Principles of diving including the properties of water, pressure and buoyancy, gas laws, and air consumption; Physiology of diving including the effect of pressure on the human body, adverse effects of gases, barotraumas, the role of nitrogen in decompression illness (DCI), signs and symptoms of DCI; Safe diving practices including the use of decompression tables, diver rescue techniques and emergency ascents; Diving Equipment; Diving as a tool for scientific research including an introduction to the fauna and flora of coral reefs; Underwater sampling and survey methods data collation and analysis.