Glossary – SUUNTO VYTEC User Manual
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9. GLOSSARY
Air Time
The amount of dive time remaining, based
on a calculation of cylinder pressure and
ambient pressure and present air consump-
tion.
Altitude dive
A dive made at an elevation greater than
300 m [1000 ft] above sea level.
Ascent rate
The speed at which the diver ascends
toward the surface.
ASC RATE
Abbreviation for ascent rate.
Ascent time
The minimum amount of time needed to
reach the surface on a decompression stop
dive.
ASC TIME
Abbreviation for ascent time.
Ceiling
On a decompression stop dive the shallow-
est depth to which a diver may ascend
based on computer nitrogen load.
Ceiling Zone
On a decompression stop dive the zone
between the ceiling and the ceiling plus 1.8
m [6 ft]. This depth range is displayed with
the two arrows pointing toward each other
(the hour glass icon).
CNS
Abbreviation for Central Nervous System
toxicity.
Central Nervous System Toxicity
Toxicity caused by oxygen. Can cause a
variety of neurological symptoms. The most
important of which is an epileptic-like
convulsion which can cause a diver to
drown.
CNS%
Central Nervous System toxicity limit
fraction. Also note Oxygen Limit Fraction
Compartment
See Tissue group.
DAN
Divers Alert Network.
DCI
Abbreviation for decompression illness.