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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 ATMOS
ai
).
Alternate Display - Additional information accessible by pressing a control button.
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.
Battery Indicator - An icon displayed while in Surface Mode, flashes to indicate a Low Battery Condition.
Caution Zone - The yellow sections of the Nitrogen Bar Graph , O2 Bar Graph, and Variable Ascent Rate Indicator that give a visual
warning of a divers proximity to decompression limits, oxygen tolerance limits, and ascent rate, respectively.
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 depth
display.
DEMO - Abbreviation for demonstration, a variety of modes that display sample dives.
Diagnostic Mode - The first display seen on dive computers after initial activation during which time a selfcheck for internal faults
is performed.
Display - A visual readout of information.
Dive DownLoader - An AERIS name for a PC interface hardware/software package.
Dive Log Mode - A computer display of previous dive information.
Dive Planner - A display of available dive times at 10 foot (3 meter) intervals from 30 to 160 feet. (9 to 48 meters) used when dive
planning.
Dive Time Remaining - A display of the time before a diver must surface based on no decompression status.
GLOSSARY
