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Q8. With respect to refrigeration gases used on-board vessels, answer the following:

a). Explain Ozone Depleting Potential (ODP) and Global warming potential (GWP) of conventional refrigerant gases. (7)

b). Name the alternate refrigerant gases available and being used on board. (7)

c). Explain the steps you will take to ensure that release of refrigerant gases from the plant in minimized during normal operation and during maintenance activities. (6)