SUUNTO VYTEC - Manual (Page 80)

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Toxicity.
Oxygen Limit Fraction A term used by SUUNTO for the values
displayed in the 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 contin-
gency 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.
Tissue group Theoretical concept used to model bodily
tissues for the construction of decompres-
sion tables or calculations.
Whole-Body Toxicity Another form of oxygen toxicity, which is
caused by prolonged exposure to high
oxygen partial pressures. The most
common symptoms are irritation in the