SUUNTO Stinger - Manual (Page 114)

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Oxygen partial pressure
Limits the maximum depth to which the used Nitrox mixture
can safely be used. The maximum partial pressure limit for
enriched air diving is 1.4 bar. The contingency partial pressure
limit is 1.6 bar. Dives beyond this limit have the risk for
immediate oxygen toxicity.
PO
2
Abbreviation for oxygen partial pressure.
Suunto RGBM Abbreviation for Suunto Reduced Gradient Bubble Model.
Suunto Reduced Gradient Bubble Model
Modern algorithm for tracking both dissolved and free gas in
divers.
Repetitive dive Any dive whose decompression time limits are affected by
residual nitrogen absorbed during previous dives.
Residual nitrogen The amount of excess nitrogen remaining in a diver after one
or more dives.
Shallow - water blackout (SWB)
An unconscious state divers experience when the brain
becomes deprived of oxygen. SWB frequently happens
without warning, causing death by subsequent drowning.