getting bent / DCS , decompression sickness from surfacing too fast or exceeding limits, bottom time, how long you stay underwater, deco, decompression diving beyond no-decompression limits requiring longer/extra stops, off-gassing, releasing absorbed nitrogen safely (helping prevent DCS), surface interval, time between dives to off-gas before the next dive, safety stop, a shallow stop (typically ~3 minutes at ~5 m / 16 ft) to aid off-gassing, no-fly time, recommended waiting period before flying after diving to reduce DCS risk.

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