3
• IMPORTANT WARNINGS
No part of this document may be reproduced,
stored in a retrieval system, or transmitted
in any form without the written permission of
Mares S.p.A.
Mares adopts a policy of continuing
improvement, and therefore reserves the right
to make changes and enhancements to any of
the products described in this manual without
notice.
Under no circumstances shall Mares be held
responsible for any loss or damage sustained
by third parties deriving from the use of this
instrument.
WARNING
A dive computer is an electronic
instrument and as such it is not immune
to failure. To protect yourself against the
unlikely event of a failure, in addition to the
dive computer, also use a depth gauge, a
submersible pressure gauge, a timer or
watch, and dive tables.
WARNING
Do not dive if the display appears unusual
or unclear.
WARNING
The dive computer must not be used in
conditions that preclude its use (e.g.: low
or no visibility, making it impossible to
read the gauge).
WARNING
The dive computer cannot ensure against
possible decompression sickness.
DISCLAIMER
This manual describes how to operate an
instrument and it describes the information
provided by the instrument during a dive.
Neither this manual nor the instrument are a
substitute for dive training, common sense and
good diving practices.
How the information provided by the
instrument is interpreted and put to use by
the diver is not the responsibility of Mares.
Read the manual carefully and make sure you
understand completely how the instrument
works and the information it provides during
a dive, including information on depth, time,
decompression obligations and all warnings
and alarms. Unless you fully understand how
the instrument works and the information
it displays and unless you accept full
responsibility for using this instrument, do not
dive with it.
• 1. INTRODUCTION
1.1. GLOSSARY
AIR: Air dive
:
Symbolizes decompression stop violation.
:
Symbolizes uncontrolled ascent and uncontrolled ascent violation.
ASC:
Total ascent time, the time it takes to perform the ascent from your current depth to the surface in a decompression dive,
including all decompression stops and assuming an ascent rate of 10m/min or 33ft/min.
AVG: Average depth, calculated from the beginning of the dive.
CNS: Central Nervous System. CNS% is used to quantify toxic effects of oxygen.
DESAT: Desaturation time. The time needed for the body to eliminate the nitrogen taken up during diving.
Gas switching: The act of changing from one breathing gas to another.
Max depth: Maximum depth attained during the dive.
MOD:
Maximum Operating Depth. This is the depth at which the partial pressure of oxygen (ppO
2
) reaches the maximum allowed
level (ppO
2
max). Diving deeper than the MOD will expose the diver to unsafe ppO
2
levels.
Multigas: Refers to a dive in which more than one breathing gas is used (air and/or Nitrox).
Nitrox: A breathing mix made of oxygen and nitrogen, with the oxygen concentration being 22% or higher.
NO FLY: Minimum amount of time the diver should wait before taking a plane.
No deco time:
This is the time that you can stay at the current depth and still make a direct ascent to the surface without having to perform
mandatory decompression stops.
O
2
: Oxygen.
O
2
%: Oxygen concentration used by the computer in all calculations.
P Factor:
Personalization factors, which allow the user to select between the standard decompression algorithm (P0) and an
increasingly more conservative one (P1, P2).
ppO
2
:
Partial pressure of oxygen. This is the pressure of the oxygen in the breathing mix. It is a function of depth and oxygen
concentration. A ppO
2
higher than 1.6bar is considered dangerous.
ppO
2
max: The maximum allowed value for ppO
2
. Together with the oxygen concentration it defines the MOD.
Switch depth: The depth at which the diver plans to switch to a higher oxygen concentration mix while using the multigas option.
S.I.: Surface interval.
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