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GLOSSARY
The following are diving terms that you should become familiar with. Many definitions given below apply
specifically to the PRODIGY.
Algorithm - A step-by-step mathematical formula designed to accomplish a particular result (i.e. Dive Time
Remaining in the PRODIGY)
Altitude Dive - A dive made at an elevation above sea level where a different set of no-decompression tables is
used (3,000+ feet/915 meters)
Ascent Rate - The speed that a diver ascends toward the surface
Boot - A protective rubber covering that surrounds an instrument module
Bottom Time - The total time spent underwater during a dive between 5 feet on initial descent to 3 feet on final
ascent
C.Z. - Abbreviation for Caution Zone
Caution Zone - The yellow section of the Tissue Loading Bar Graph that gives a visual warning of a diver’s
proximity to decompression
Ceiling - See decompression ceiling
Clean Dive - A dive preceded by 24 hours of no diving activity
Compartment - A term applied to the hypothetical modeling of nitrogen absorption in the tissues (more accu-
rate than the term “tissue” because dive computer models have no direct relation to human tissues)
DCS - Abbreviation for decompression sickness, i.e., “the bends”
DEC - Abbreviation for Decompression
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