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Oxygen Toxicity bargraph. The value is either the CNS%
or the OTU%.
O
2
% Oxygen percentage or oxygen fraction in the breathing
gas. Standard air has 21% oxygen.
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.
RGBM Abbreviation for Reduced Gradient Bubble Model.
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.
SURF TIME Abbreviation for surface interval time.
Surface interval time Elapsed time between surfacing from a dive and beginning
a descent for the subsequent repetitive dive.
