User`s guide

Nemo Wide dive computer
8
Fig. 17
NOTE
When the <ESC> button is pressed during
the dive, Nemo Wide will temporarily
display the estimated deep stop 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.
ASCENT
 WARNING
A rapid ascent increases the risk of
decompression sickness.
 WARNING
Disabling the “Stop” on 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 Wide activates the
ascent rate control algorithm, displaying the
value both in m/min (ft/min) and graphically
(Fig. 18).
Fig. 18
If the diver’s speed exceeds 12 m/min (39
ft/min), the “Slow” message appears on the
display bar and Nemo Wide sounds an audible
alarm that persists until the ascent rate
returns below the maximum permitted limit
(12 m/min - 39 ft/min).
At the same time as the audible alarm is
triggered, the computer begins monitoring an
“Uncontrolled Ascent”. An ascent is considered
“uncontrolled” when the diver exceeds the
maximum rate for a stretch equal to at least
two thirds of the depth at which the audible
alarm was triggered. This criterion only
applies to alarms triggered below a depth of
12 m (39 ft).
In case of an uncontrolled ascent, upon
surfacing Nemo Wide disables the AIR and
EAN functions of Dive Mode, and will only
function as a timer and depth gauge (BOTTOM
TIME).
The other operating modes remain active.
The “Stop” on uncontrolled ascent function can
be disabled in Set Dive mode.
SAFETY STOP
If the maximum depth of a dive exceeds 10
meters, a “Safety Stop” is activated for the
ascent. Nemo Wide suggests that divers take
a 3-minute safety stop between 2.5 and 6 m
in depth (8 - 19 ft), and will display the word
“SAFEST”. A Timer located on the display bar
indicates the time needed to complete the stop
(Fig. 19).
Fig. 19
If the diver moves outside the afore-mentioned
depth range, the safety stop timer is halted.
When the diver re-enters the correct depth
range, the safety stop timer resumes from
where it left off.
If the diver returns to a depth below 10 m
(32 ft), the safety stop timer will ignore the
previously aborted stop and will start over
from scratch. In the case of a decompression-
stop dive, the safety stop extends the duration
of the decompression stop at 3 m (10 ft) by an
additional 3 minutes, displaying the safety stop
information as described previously.
SURFACING  AIR
When the measured depth is less than 1 m
(3 ft), Nemo Wide considers the dive to be
suspended (“Surfacing”) and halts the dive
timer. If the diver does not return below 1.2 m
(4 ft) within the next 3 minutes, Nemo Wide
considers the dive to be finished and records its
data in the log book memory. If the diver does
re-descend within 3 minutes, the dive continues
and the dive timer resumes from where it left
off.
Data displayed in Surface mode (Fig. 20):
• duration of the dive;
• maximum depth;
• icons for any mistakes made during the
dive(omitted stop, uncontrolled ascent).
Fig. 20
 WARNING
If an AIR or EAN dive ends with an
uncontrolled ascent or an omitted stop,
Nemo Wide will restrict Dive - AIR and Dive -
EAN modes for 24 hours and will only allow
the BOTTOM TIME operation mode.
NOTE
The buttons in surfacing mode are
disabled.
 WARNING
Do not fly or travel to high altitudes while
the no-fly indication remains active.
SURFACE MODE  AIR
When the dive is considered finished, Nemo
Wide switches from Dive mode to Time mode,
indicating the desaturation time in the display
bar as well as the NO FLY icon (Fig. 21).
Fig. 21
In addition, Nemo Wide displays the icons for
any errors made during the dive (omitted stop,
uncontrolled ascent).
You can also use the <+> and <-> keys to
view the no-fly time, the time, date, and
temperature.
The <ESC> button returns you to the main
menu.
DIVE  EAN
Due to the lower percentage of nitrogen in the
breathing mix, oxygen-rich mixtures make it
possible to extend the no-decompression limits,
as compared with the same dive with air.
However, the higher oxygen content in the mix
exposes the diver to oxygen toxicity hazards
which are not generally encountered in
recreational dives with compressed air.
In EAN mode, Nemo Wide computes oxygen
toxicity on the basis of the dive time, the depth
and the oxygen percentage setting, providing
indications that enable the diver to remain
within the safe limits for oxygen exposure.
To do a EAN dive, you must select the EAN
mode in the Set Dive - Mode menu.
Nemo Wide handles EAN dives in a similar
manner to compressed air dives. That means
that you will have the same functions and
procedures for selecting the Dive mode.
The only differences in managing the two
types of dives concern the settings for general
parameters for EAN dives and the of display