Operation Manual

depth at a safe rate in accordance with your nitrox training. If you continue

the dive at your current depth, or descend deeper, your exposure to

CNS oxygen toxicity will increase.

OXYGEN ACCUMULATION

It is also important that you understand that conducting repetitive dives using

enriched nitrogen-oxygen (nitrox) mixtures can lead to oxygen buildup, reduc-

ing oxygen tolerance while increasing the risk of pulmonary oxygen toxicity.

The O2 bar graph (Fig. 103) provides a visual representation of oxygen accu-

mulation for either that dive or 24 hour period, whichever is greater.

Oceanic strongly recommends that you avoid exceeding oxygen expo-

sure limits, and reminds you that nitrox diving requires special train-

ing and understanding of the effects of oxygen toxicity.

WARNING: In the event that you exceed the maximum per dive

allowable oxygen exposure (dose), it is recommended that you

allow a surface interval of at least 2 hours before reentering

the water. If you exceed the maximum 24 hour period allow-

able oxygen exposure (dose), you must allow a surface interval

of at least 24 hours before reentering the water.

Fig. 103 - O2 Bar Graph

DECO

C.Z. C.Z.

NO DECO