Suunto VYTEC DS manual Glossary

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.

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