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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 INSIGHT).
Alternate Display - Additional information accessible by pressing a control button.
Altitude Dive - A dive made at an elevation above sea level (> 3,000 feet/915 meters) when no decompression limits are reduced .
Ascent Rate - The speed that a diver ascends toward the surface.
Ascent Rate Indicator - A display that shows ascent rate as a bar graph.
Audible Alarm - A computer emitted tone that alerts the diver to potential danger.
Battery Indicator - An icon displayed while in Surface Time/Wet Mode, indicates a Low Battery Condition.
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.
Deep Stop - A no decompression stop at which a diver may choose, but is not required, to pause during ascent to allow bubbles to dissipate naturally.
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 simulated dives.
Diagnostic Mode - The first display seen on dive computers after initial activation during which time a self check for internal faults is performed.
Display - A visual readout of information.
Dive Log Mode - A computer display of previous dive information.
Dive Planner - A display of available dive times at 10 FT (3 M) intervals from 30 to 190 FT. (9 to 57 M) used when dive planning.
Dive Time Remaining - A display of the time before a diver must surface based on no decompression or oxygen accumulation status.
Elapsed Dive Time - Total time spent underwater during a dive between 5 FT (1.5 M) on initial descent to 2 FT (0.6 M) on final ascent.
FO2 - The fraction (percent / 100) of oxygen (O2) in the breathing gas mixture.
GLOSSARY