User`s guide

9
 WARNING
When the <+> or <-> buttons are pressed
during the dive, Nemo Air will temporarily
display the estimated DEEPSTOP required.
The data displayed during the ascent may
vary as a result of the diver’s behavior.
Divers should check this data during the
ascent for more precise information on the
estimated stop.
DIVE  AIR: “DECOMPRESSION STOP” DIVE
If the diver does not ascend when the residual
time has expired, Nemo Air switches to
“decompression stop” mode, indicated by
the appearance of the “DECO” message and
by an audible alarm. The following data are
displayed in this mode (figure 20):
FIG. 20
• DECO icon;
• current depth (in “m” or “ft”);
• depth of deepest decompression stop
(in “m” or “ft”);
• duration of the deepest decompression stop;
• icons for the altitude program and personal
correction factor (if enabled);
• actual length of the dive (DIVE TIME) in
minutes;
• ASCENT TIME in minutes;
• DEEPSTOP icon (if active);
• ascent rate in analog and digital mode;
• tank pressure in bar or psi;
• air time remaining at the current depth;
• breathing rate in liters/min or cubic feet/min.
In this mode, the <+> and <-> buttons have the
same function. Pressing the <+> or <-> button
will display the following information for a few
seconds (figure 21):
FIG. 21
• maximum depth reached;
• current time;
• application of the PLAN DEEPSTOP icon and
the DEEPSTOP level (if activated);
• ascent rate in analog and digital mode;
• temperature (in °C or in °F);
• tank pressure in bar or psi;
• air time remaining at the current depth;
• breathing rate in liters/min or cubic feet/min.
Pressing and holding the <+> or <-> key for a few
seconds will temporarily display the dive settings.
NOTE
When the no-decompression time
remaining is one minute, an audible alarm
is sounded to indicate that the diver is
about to exceed the no-decompression
limits.
ASC TIME TIME TO SURFACE
The ASCENT TIME is given by the sum of:
• duration of the various decompression
stops;
• time required to ascend at an average speed
of 10 m/min (32 ft/min).
• DEEPSTOPS if any.
DECOMPRESSION STOPS
Nemo Air also checks that the decompression
stops are performed correctly: two icons
graphically indicate what action the diver
should take (figure 22).
FIG. 22
• triangles: correct decompression stop depth;
• upward triangle: diver below decompression
stop depth, ascend;
• downward triangle: diver has ascended
beyond decompression stop depth, descend.
If the decompression stop depth is exceeded by
more than 30 cm (11 inches), the “downward
triangle” icon will flash; if it exceeds 1m (3 ft)
it keeps flashing and an audible alarm will
sound. These warnings remain active until the
diver returns to the correct depth.
 WARNING
When the omitted deco stop alarms are
triggered, desaturation of the simulated
tissue compartments is halted and
resumes only when the diver returns to
the correct stop depth.
 WARNING
Never ascend above the correct
decompression stop depth.
NOTE
If the deco-stop overshoot exceeds one meter
and lasts more than three minutes, the
computer switches to “Omitted Stop” mode
and the corresponding icon appears. After the
dive, if you wish to dive again before 24 hours
have elapsed, Nemo Air will function only
as a depth gauge and timer (BOTTOM TIME
mode), and will display the errors.
DEEP STOPS
To minimize the likelihood of critical bubble
seed formation, in the case of decompression
dives or dives close to the no-deco limit,
Nemo Air prompts for a series of one-minute
deep stops at different depths depending on
the dive profile. Thus, when the applicable
conditions exist during the dive, Nemo Air will
display a DEEPSTOP icon (figure 23).
FIG. 23
This display indicates that the need for a deep
stop during the ascent has been detected. As
the diver nears the depth set for the deep stop,
Nemo Air will sound an audible alarm, and will
display how long the diver must remain at the
stop depth (figure 24).
In this mode, the ascent rate is only shown
analogically.
FIG. 24
There can be more than one deep stop during
a dive. This depends on the dive profile and on
the type of decompression.
NOTE
During a dive with Nemo Air, if the
DEEPSTOP icon is active, pressing the <+>
or <-> button will temporarily display the
estimated stop required.
DIVE  AIR: ASCENT
 WARNING
A rapid ascent increases the risk of
decompression sickness.
 WARNING
Disabling the “STOP” on an uncontrolled
ascent should only be done by highly
experienced divers, who take full responsibility
for the consequences of this action.
As the diver ascends, Nemo Air activates the
ascent rate control algorithm, displaying the
value both in m/min (ft/min) and graphically
(figure 25).
FIG. 25
If the ascent rate exceeds 120% of the
optimal value of 10 m/min (33 ft/min), the
word “SLOW” will appear, and Nemo Air will
sound an audible alarm that continues until