Term Explanation
contingency partial pressure limit is 1.6 bar. Dives
beyond this limit risk immediate oxygen toxicity.
Repetitive dive Any dive whose decompression time limits are aected
by residual nitrogen absorbed during previous dives.
Residual nitrogen The amount of excess nitrogen remaining in a diver
after one or more dives.
RGBM Reduced gradient bubble model. Modern algorithm for
tracking both dissolved and free gas in divers.
Scuba Self-contained underwater breathing apparatus.
Surface time Elapsed time between surfacing from a dive and
beginning a descent for the subsequent dive.
Tissue group Theoretical concept used to model bodily tissues for the
construction of decompression tables or calculations.
Trimix A breathing gas mix of helium, oxygen and nitrogen.
Suunto EON Steel Black
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