SUUNTO Vyper - Manual (Page 75)

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No-decompression dive Any dive which permits a direct, uninterrupted
ascent to the surface at any time.
NO DEC TIME Abbreviation for no-decompression time limit.
OEA = EAN = EANx Abbreviation for Oxygen Enriched Air Nitrox.
OLF Abbreviation for Oxygen Limit Fraction.
OTU Abbreviation for Oxygen Tolerance Unit.
Oxygen Tolerance Unit Is used to measure the Whole-Body-Toxicity.
Oxygen Limit Fraction A term used by SUUNTO for oxygen accumulation/
exposure. A combination of CNS% and OTU%.
O2% 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 algorithms for tracking both dissolved and
free gas in the tissues of divers performing a wide
variety of maneuvers.
Repetitive dive Any dive whose no-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.