SUUNTO Cobra - Manual (Page 70)

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8. GLOSSARY
Air Time The amount of dive time remaining, based on a calculation
of cylinder pressure and ambient pressure and present air
consumption.
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 shallowest 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.
Decompression Time spent at a decompression stop or range before surfacing,
to allow absorbed nitrogen to escape naturally from tissues.
Decompression range On a decompression stop dive the depth range, between the fl oor
and ceiling, within which a diver must stop for some time
during ascent.
Decompression illness
Any of a variety of maladies resulting either directly or indirectly
from the formation of nitrogen bubbles in tissues or body
fl uids, as a result of inadequately controlled decompression.
Commonly called “bends” or “DCI”.