14
maintained for two thirds or more of the depth
at which the alarm was first triggered, Icon HD
considers it a dive violation and the display will
show VIOLATION - ASCENT. This message will
remain on the screen until you hit any button
to acknowledge having seen it.
If the diver attempts a dive after an ascent
violation, Icon HD will only function as a
depth gauge and timer (bottom timer mode),
and it will display the message LOCKED BY
PREVIOUS DIVE.
WARNING
You can disable the uncontrolled
ascent function under the SET DIVE
submenu. This should only be done by
highly experienced divers, who take full
responsibility for the consequences of this
action.
3.2.2. MOD/ppO
2
WARNING
- The MOD should not be exceeded.
Disregarding the alarm can lead to serious
injury or death.
- Exceeding a ppO
2
of 1.6bar can lead to
sudden convulsions resulting in serious
injury or death.
When the diver reaches a depth at which the
ppO
2
of the inspired gas exceeds the maximum
limit entered in the corresponding setting (from
1.2 to 1.6bar), an audible alarm goes off, the
depth is shown in red and the message MOD
EXCEEDED is shown at the bottom of the display.
The alarm persists until the diver has
ascended enough for the ppO
2
to return within
the set limit. While the alarm is active, the
map function is disabled and the compass can
only be called up for 10 seconds, after which
the default display with the alarm message
is shown again. The gas switch menu can be
called up for 20s before the display switches
back to the alarm message.
WARNING
When the MOD alarm is triggered, ascend
immediately until the alarm stops. Failure to
do so could result in serious injury or death.
3.2.3. CNS = 75%
WARNING
When the CNS reaches 100% there is
danger of oxygen toxicity. Icon HD starts
alerting you when you reach 75%.
Oxygen toxicity exposure is tracked on Icon
HD by means of the CNS% based on currently
accepted recommendations for exposure limits.
Thistoxicity is expressed as a percentage value
which ranges from 0% to 100%. When the value
exceeds 75%, it turns red and the warning
message CNS > 75% appears on the display
until you hit any button to acknowledge having
seen it. Furthermore, the field which can be
selected via the button shows the CNS value
in red. If you push the button to view any
other value, it will remain for 4s only, and then
return to the CNS value.
If the oxygen toxicity level reaches 75%, ascend
to shallower depth to decrease oxygen loading
and consider terminating the dive.
WARNING
Diving with oxygen toxicity at levels of 75%
or greater may put you into a potentially
hazardous situation, which could result in
serious injury or death.
3.2.4. MISSED DECOMPRESSION STOP
WARNING
Violating a mandatory decompression
obligation may result in serious injury or
death.
If you ascend above the decompression stop
depth by more than 0.3m (1ft), an audible
alarm goes off and the message BACK TO
STOP DEPTH is displayed at the bottom of the
screen. This alarm remains active until you
return to the correct depth. Note that while the
alarm is active, it is not possible to consult the
map, and the compass can be viewed only for
10 seconds before the screen returns to the
default display.
WARNING
- When the missed deco stop alarm is
triggered, desaturation of the simulated
tissue compartments is halted and
resumes only when the diver returns to
the correct stop depth.
- Never ascend above the displayed
decompression stop depth.
3.2.4.1. MISSED DECO STOP MODE
If the stop depth is exceeded by more than
1m (3ft) for more than threeminutes, Icon HD
considers it a dive violation and the display will
show VIOLATION - DECO
.
In this case, if the diver attempts a repetitive
dive after surfacing, Icon HD will function
only as a depth gauge and timer (bottom
timer mode), and it will display the message
LOCKED BY PREVIOUS DIVE.
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