What is the definition of "minimum gas" in diving terminology?

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The definition of "minimum gas" in diving terminology refers to the gas volume remaining in the diver's cylinder before they must start their ascent. This is a critical concept for ensuring safety during a dive because it accounts for the amount of breathing gas needed to return to the surface safely, factoring in any emergencies or unexpected situations.

When planning a dive, divers calculate their minimum gas requirements based on their depth, time, and personal breathing rates. This ensures that they have enough gas not only for a controlled ascent but also to handle any potential issues that may arise, such as a buddy emergency or needing to spend more time at safety stops. By adhering to the minimum gas rule, divers significantly enhance their safety margins and can avoid situations where they find themselves running low on air before reaching the surface.

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