15
9.8. VIEWING MAPS DURING A
DIVE
To call up the map selected under SET
DIVE/LINKED MAP, press from the
decompression summary table. The map will
remain on the display for 10 seconds, after
which the screen reverts to dive information.
You can press to return to the main screen
before the 10 seconds have elapsed (Fig. 29).
NOTE
- In the event of an alarm, Genius
automatically switches back to the
standard display.
- The map is static, and does not change
as you swim during the dive.
9.9. UNDERWATER MENU
By pressing and holding the left button ( ) you
can call up a menu which allows you to change
certain settings during the dive. These are
described in detail in section although some
names have changed a bit due to the limited
length available in the UW menu (Fig. 30).
BOOKMARK - allows you to set a bookmark
which you can later review in the downloaded
dive profile
AIR (or G1) - corresponds to MODE in 2.1. This
is meant for those occasions when you forgot
to update the oxygen percentage setting in the
computer after a change of nitrox, a switch
from air to nitrox or viceversa, which would
force you to abort the dive or at least go to the
surface, wait three minutes to exit the dive and
then perform the change. This menu is active
only during the first minute of the dive and only
if the depth has not exceeded 6m / 20ft.
NOTE
This menu is not meant for switching to a
high oxygen content decompression gas.
GF DIVE - as described in 2.2.3
LINKED MAP - as described in 2.12
NIGHT MODE - as described in 2.8
FUTURE DECO - as described in 2.6
MAX DEPTH - as described in 2.4.1
DIVE TIME - as described in 2.4.2
BRIGHTNESS - as described in 3.4
TANK VOLUME - as described in 2.3
MAX PRESSURE - corresponds to OPERATING
TANK PRESSURE in 2.3
HALF TANK - corresponds to MID TANK
WARNING in 2.3
TANK RESERVE - as described in 2.3
WATER - as described in 2.7
• 10. AFTER THE DIVE
Upon returning to the surface, Genius first
goes into the so-called surfacing mode. This
mode allows you to resume your dive after a
brief period of orientation. The screen shows
a 3-minute countdown, a profile of the dive,
your maximum depth, dive time, average depth
and, for nitrox dives, the CNS% at the end of
the dive. When used with the optional tank
module, the screen shows the tank pressure
as well (Fig. 31).
If you submerge again before the 3-minute
countdown is over, the dive time will resume
from where it left off, including the time spent
on the surface. If you do not submerge before
the end of the countdown, Genius considers the
dive finished, records the data to the logbook
and reverts to the so-called post-dive mode.
The post-dive screen shows the following
information (Fig. 32):
- The remaining desaturation time (DESAT):
this is calculated by the decompression
model in the computer. Any dive started
while there is remaining desaturation on
your computer is considered a repetitive
dive, meaning that Genius accounts for the
pre-existing nitrogen load in your body.
- The no-fly time (NO-FLY): this is the time
during which an exposure to the reduced
pressure inside the cabin of an airplane
could cause decompression sickness.
Genius calculates this as the time it takes
for the tissue tension in all compartments to
be compatible with an ambient pressure of
0.55bar (corresponding to a depressurized
airplane cabin).
WARNING
Flying while Genius displays NO-FLY can
result in serious injury or death.
- The surface interval (SURF. INT.): this is
displayed from the moment the dive is
closed (3minutes after surfacing) for as
long as there is remaining desaturation or
no-fly time on the computer.
- CNS: this allows you to track how the CNS
load from the previous dive is gradually
reduced during the surface interval.
The screen also shows the main data of the
last dive: max depth, temperature, dive time,
initial and final tank pressure.
In addition, the supersaturation with respect
to ambient pressure at the surface in all 16
compartments of the algorithm is shown
discretized in ten segments. The tallest bar is
also reproduced along the left edge in the same
fashion as it is also during the dive. You can
use this to gauge your progress in getting rid of
nitrogen as the surface interval grows. Genius
continues to perform decompression-related
calculations (inert gas release), for as long as
there is desaturation or no-fly time left.
• 11. DIVING WITH MORE THAN ONE
GAS MIXTURE
WARNING
- Diving with more than one gas mixture
represents a much higher risk than
diving with a single gas mixture, and
mistakes by the diver may lead to
serious injury or death.
- During dives with more than one gas
mixture, always make sure you are
breathing from the tank that you intend
to breathe from. Breathing from a high
oxygen concentration mix at the wrong
depth can kill you instantly.
- Mark all your regulators and tanks so
that you cannot confuse them under any
circumstance.
- Before each dive and after changing
a tank, ensure that each gas mixture
is set to the correct value for the
corresponding tank.
Genius enables you to use up to three gas
mixtures during the dive (air and Nitrox
only). The three mixtures are labeled G1, G2
and G3 and must be in ascending order of
oxygen content, i.e. G1 has the lowest oxygen
concentration, G2 an intermediate value, and
G3 has the highest oxygen concentration of the
three. Two or more tanks can also be set to the
same oxygen concentration. If you are diving
with only two mixtures, you will be utilizing
tanks G1 and G2.
Genius can be set to consider all active gases
in the decompression calculation, or it can
be set to consider only the gas currently in
use. In the first case (PREDICTIVE = ON in
2.5.1), when you switch gas when prompted
to do so during an ascent, you will not see
a change in the decompression calculation:
Genius considered that you were going to
switch gas and already considered the effect
of this on the decompression. In the second
case (PREDICTIVE = OFF in 2.5.1) you will see
a reduction in the total ascent time as you
switch to a gas with higher oxygen content and
Genius considers this for the decompression
calculation.
Genius can show the tank pressure of each
tank if the corresponding first stage regulator
is equipped with a Mares tank module, paired
as described in section 1.8. Note that Genius
can be programmed and used for diving with
more than one gas mixture whether you use
tank modules for each or not.
NOTE
You can set all the gases to the same
oxygen percentage.
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