Dive Computer
User Manual
Liquivision Products, Inc
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47
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Revision 3.2 Software 2.58
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Simulated decompression planning
– these calculations only occur when you run
Simulate Dive
on your XEO. The Dive Simulator starts with your actual inert gas and oxygen saturation, but
after that it tracks your simulated inert gas and oxygen saturation. Also, it follows the pressure
implied by the dive simulation, and not the actual ambient pressure around you.
After the simulated dive is finished, the simulated saturation is wiped out. If you start a new
simulation, it will start again from your actual saturation. Also, the simulated dive will not, of
course, affect your actual saturation.
See also
4.8. Simulate Dive
in the Dive Planning submenu, and
6.11. Simulate Dive
in the
Display Settings submenu for more information on the Dive Simulator.
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Dive planning
– these calculations start with your current actual inert gas and oxygen
saturation. If you are not yet fully desaturated from previous dives, then you can tell the Dive
Planner to “wait” certain amount of time on the surface (equivalent to whatever time is left of
your surface interval). The Dive Planner will assume your next dive will begin once your
Remaining Surface Interval has elapsed, and it will compute your ascent schedule taking into
account the Waypoints you set up and the saturations you would expect to reach based on these
Waypoints. See also the
Runtime
submenu for more information.
Whenever you begin a dive, be it an actual dive, a simulated dive, or dive planning, your XEO will
assume that you are using your Default Gas (see the
Gas Settings
section), which, when diving OC, is
the gas that you are breathing at the start of your dive or, when diving CCR, is your diluent. Also, in
the case of CCR diving, your XEO assumes that you start your dive using the Low setpoint.
Your gas or setpoint will change, during an actual dive or simulated dive, when:
o
You enter the main underwater menu and use the
Change Setpoint
or
Change Gas
options.
o
You enter the EMERGENCY underwater menu, and use the
Bailout
option. In bailout mode,
you are considered to be diving OC and breathing your diluent as a gas. To change this, you
can use
Change Gas
.
o
If the
Auto Switch
option is on (
Dive Setup
menu), either in OC or in CCR mode, your
current Gas or Setpoint may change as outlined in
Settings That Will Affect Your Deco Plan
.
Your gas or setpoint will change, during dive planning, when:
o
You manually enter a Switch (gas switch for OC, setpoint switch for CCR) – see
Runtime
submenu for details.
o
Your XEO computes ascent schedule – more on this below
When your XEO is computing your ascent schedule, it is assuming you will be changing your gas or
setpoint on the way up, irrespective of the
Auto Switch
option.
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When diving OC, your gas will be updated always to the Best Gas for a specific depth of your
ascent schedule. If there is not a single gas breathable at that depth – a hypothetical situation,
which definitely is to be avoided – it is not changed. The Best Gas is chosen among all Dive
and Deco Gases you have set up, that have not been flagged as “Lost”.
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When diving CCR it does not change your setpoint, until:
o
Your depth at this point of your ascent schedule is below
On Descent
option – then, the
setpoint will be changed to High.
o
Your depth at this point of your ascent schedule is above
On Ascent
option – then, the
setpoint is changed to “Low”.
