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XTC-100
GLOSSARY
Air - A breathing gas that contains approximately 21% oxygen and 79% nitrogen (nature's common nitrogen - oxygen mix-
ture).
Air Dive - A dive conducted using air (approximately 21% oxygen & 79% nitrogen) as the breathing gas.
Algorithm - A step-by-step mathematical formula designed to accomplish a particular result (i.e. Dive Time Remaining in the
XTC-100).
Altitude Dive - A dive made at an elevation above sea level (2,000+ ft. / 610+ m.) where a different set of no decompression
tables is used .
Ascent Rate - The speed that a diver ascends toward the surface.
Audible Alarm - A computer emitted tone that alerts the diver to potential danger.
Breathing Gas - The gaseous mixture breathed during a dive.
CZ - Abbreviation for Caution Zone.
Caution Zone - The yellow sections of the bar graphs that give a visual indication of a diver’s proximity to respective limits.
Ceiling - See decompression ceiling.
Clean Dive - A dive preceded by 24 hours of no diving activity.
CNS - Abbreviation for the Central Nervous System of the body.
Competitive Dive - A dive conducted for profit or prize.
Compartment - A term applied to the hypothetical modeling of nitrogen absorption in the tissues (more accurate than the
term “tissue” because dive computer models have no direct relation to human tissues).
DCS - Abbreviation for decompression sickness, i.e., “the bends”.
DECO - Abbreviation for Decompression.
Decompression Ceiling - The shallowest depth a diver may reach upon ascent without risking decompression sickness.
Decompression Stop - The depth(s) at which a diver must pause during ascent to allow absorbed nitrogen to escape naturally
from the tissues.
Depth Sensor - An electro-mechanical device that converts water pressure into an electrical signal, that is converted to a visual
