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GLOSSARY
Altitude dive
A dive madeat an elevation greaterthan 300 m/1000 ftabove sea level.
Ascent rate
The speed at which the diver ascendstoward the surface.
ASC RATE
Abbreviation for ascent rate.
Ascent time
The minimum amount of time needed to reach the surface on a decom-
pression stop dive.
ASC TIME
Abbreviation for ascent time.
Ceiling
Ona decompressionstop dive,the shallowestdepthto whicha divermay
ascend based on computed nitrogen load.
Central nervous system toxicity
Toxicitycaused byoxygen. Cancause avariety ofneurological symptoms.
The most important of which is an epileptic-like convulsion which can
cause a diver to drown.
CNS
Abbreviation for central nervous system toxicity.
CNS%
Central nervous system toxicity limit fraction. Also note Oxygen Limit
Fraction
Compartment
See "Tissue group".
DAN
Abbreviation for Divers Alert Network.
DCI
Abbreviation for decompression illness.
DM4
Suunto DM4 with Movescount, a software formanaging your dives
Decompression
Timespent at adecompression stop, orrange, beforesurfacing, to allow
absorbed nitrogen to escape naturally from tissues
Decompression range
On a decompression stop dive, the depth range between the floor and
the ceiling within which a diver muststop for some time during ascent.
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