Suunto D5 User Manual page 63

Suunto D5
Term
Nitrox (Nx)
No deco
No decompression dive
No dec time
OTU
O %
2
pO
2
Repetitive dive
Residual nitrogen
RGBM
Scuba
Surface time
Tissue group
Explanation
In sports diving, refers to any mix with a higher fraction
of oxygen than standard air.
No decompression stop time. The maximum amount of
time a diver may remain at a particular depth without
having to make decompression stops during the
subsequent ascent.
Any dive which permits a direct, uninterrupted ascent to
the surface at any time.
Abbreviation for no decompression time limit.
Oxygen tolerance unit. Used to measure the whole-
body-toxicity, caused by prolonged exposure to high
oxygen partial pressures. The most common symptoms
are irritation in the lungs, a burning sensation in the
chest, coughing and reduction of the vital capacity.
Oxygen percentage or oxygen fraction in the breathing
gas. Standard air has 21% oxygen.
Partial pressure of oxygen. Limits the maximum depth to
which the nitrox mixture can be safely 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 risk immediate oxygen toxicity.
Any dive whose decompression time limits are affected
by residual nitrogen absorbed during previous dives.
The amount of excess nitrogen remaining in a diver
after one or more dives.
Reduced gradient bubble model. Modern algorithm for
tracking both dissolved and free gas in divers.
Self-contained underwater breathing apparatus.
Elapsed time between surfacing from a dive and
beginning a descent for the subsequent dive.
Theoretical concept used to model bodily tissues for the
construction of decompression tables or calculations.
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