37
If you find yourself in Deco Stop Violation, descend to or
below the indicated stop depth and remain for the time
shown. If conditions make this impossible, make your stop
between 3-7 ft/1-2m, and remain there until the IQ-600
returns to Dive Mode (this may take considerably longer
than the display suggests it will).
You should also be aware that, during a Deco Stop Viola-
tion, the IQ-600’s Ascent Rate Warning does not function.
However, in so far as the correct response to a Deco Stop
Violation involves not only slowing your ascent, but revers-
ing it, the problem is self-correcting.
If you cannot correct an indicated Deco
Stop Violation, the warnings will contin-
ue for five minutes after surfacing. At this
point, the computer will not be usable for
the next 24 hours.
PO
2
Warning—As mentioned earlier, your IQ-600 uses a
value of 1.6 atmospheres as its absolute limiting PO
2
.
When the computer detects that a combination of depth and
FO
2
put you within 90 percent of this limit, the computer’s
audible alarm sounds for three seconds and its PO
2
LIMIT
and current depth, shown in Figure 12, will blink for three
seconds.
If you continue your descent and reach a depth at which
the PO
2
equals or exceeds 1.6 atmospheres, the audible
alarm will again sound for three seconds, and the PO
2
LIMIT and current depth will again blink and continue
blinking until you ascend to a safer depth.
