User's Manual

Suunto EON Steel
User guide
38(40)
16 GLOSSARY
Term
What it means
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.
Ascent time
The minimum amount of time needed to reach the
surface on a decompression stop dive.
CCR
Closed-Circuit rebreather. Scuba that recycles all
exhaled gas.
Ceiling
On a decompression stop dive, the shallowest depth to
which a diver may ascend based on computed inert
gas load.
CNS
Central nervous system toxicity. Toxicity is 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.
Compartment
See "Tissue group".
DM5
Suunto DM4 with Movescount, a software for managing
your dives.
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 floor and the ceiling within which a diver
must stop for some time during ascent.
DCS
Decompression sickness/illness. Any of a variety of
maladies resulting either directly or indirectly from the
formation of nitrogen bubbles in tissues or body fluids,
as a result of inadequately controlled decompression.
Dive series
A group of repetitive dives between which the dive
computer indicates some nitrogen loading is present.
When nitrogen loading reaches zero the dive computer
deactivates.
Dive time
Elapsed time between leaving the surface to descend,