Rebreathers carry many hours of breathing gas regardless of depth, so the dive time is rarely limited by gas volume. As with most rebreathers, the Se7en diver is typically limited by the duration of the CO2 absorbent, so multi-hour run time dives are routine. As with open-circuit nitrox diving, rebreather divers must also monitor their decompression and oxygen exposure; depending on the dive profile these may also limit the dive time. The Poseidon rebreathers are suitable for diving at all sport depths and the Se7en has been qualified to a depth of 330 feet/100 meters. Although the Se7en can function at depths beyond sport depths, as with any rebreather there are numerous additional considerations.
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