Glossary – SUUNTO D9 User Manual
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12. 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.