purchase and in scope to the warranties expressed herein. TUSA shall not be
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expenses or damage incurred by the purchase. All warranties not stated herein
are expressly disclaimed.
Some states do not allow the exclusion or limitation of implied warranties of
consequential damages, so the above exclusions or limitations may not apply to
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This warranty does not cover any representation or warranty made by dealers
or representatives beyond the provisions of this warranty. No dealer or repre-
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This Instruction Manual should be kept with your IQ-400.
8. GLOSSARY
Altitude dive A dive made at an elevation above 700 m [2300 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
in a decompression dive.
ASC TIME Abbreviation for ascent time.
Ceiling On a decompression dive the shallowest depth to which a
diver may ascend based on computer nitrogen load.
Ceiling Zone On a decompression 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
“hourglass” icon).
Compartment See “Tissue group”.
DCS Abbreviation for decompression sickness.
Decompression Time spent at a decompression stop or range before surfac-
ing, to allow absorbed nitrogen to escape naturally from
tissues.
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