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Gauges indicating diver depth which can be read at the dive location shall be used for all dives except SCUBA.
Each depth gauge shall be deadweight tested or calibrated against a master reference gauge every 6 months, and when there is a discrepancy greater than two percent (2 percent) of full scale between any two equivalent gauges.
A cylinder pressure gauge capable of being monitored by the diver during the dive shall be worn by each SCUBA diver.
A timekeeping device shall be available at each dive location.
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