Every diver carries at least one depth gauge and timer. These allow the diver to calculate what decompression stops to make when ascending at the end of the dive, using standard decompression tables. Alternatively, all of these functions may be combined in a dive computer which indicates depth, time and the required decompression stops. Most caves in Quintana Roo are so shallow that only a few minutes of decompression are required, provided an appropriate breathing gas is used (see later).
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