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MATRIX Dive Computer
14
- DEEP stops are generated as you approach
the no deco limit. You can either have one
2-minute stop or two 1-minute stops. DEEP
stops are NOT mandatory.
WARNING
During all dives, perform a safety stop
between 3 and 6 meters/10 and 20 feet for
3 minutes, even if no decompression stop
is required.
Upon reaching the optimum range for carrying
out a deep stop (+- 1m /3ft of the displayed
depth) or safety stop (between 6m/20ft and
3m/10ft), a countdown timer appears to
indicate the progress of the stop. For DECO
stops, since the duration is a function of the
exact depth, only the minutes are shown.
During a decompression stop, the following
symbols may appear:
: optimal range for the decompression
stop;
: above decompression stop depth,
descend immediately!
The nitrogen bar graph is on the left side of
the display. It represents nitrogen saturation in
the leading tissue compartment. The bar graph
is made of six segments, which gradually fill
during the dive. The more black segments
you see, the closer to the no deco limits you
are. As you enter a situation of mandatory
decompression stop, all segments will be
black.
During a surface interval, the segments will
gradually turn from black to clear as Matrix
tracks the offgassing of your tissues.
Ascent/descent rate: in presence of a
depth change in excess of 80cm / 3ft, Matrix
calculates the corresponding ascent or
descent speed and displays it at the bottom left
of the display, in lieu of the dive time, for the
duration of the ascent or descent.
3.3.1 ALTERNATE DISPLAYS
3.3.1.1 PROFILE VIEW
By pressing the top left button from the default
display, the screen changes to a graphic
representation of the dive, which includes the
current depth at the top and the dive time at
the bottom. The profile view has a time-out of
8 seconds. After this time the screen reverts
automatically to the default display. You can
exit the profile view before the 8 seconds are
passed by pressing the top left button.
3.3.1.2 COMPASS
Pressing and holding the top left button from
the default display brings up the compass,
which in addition to the compass rose shows
also the current depth, the no deco time
(ascent time in case of decompression dive)
and a stopwatch. Matrix utilizes a full-tilt
compass, which means that you do not need to
hold the compass leveled for it to be accurate.
The compass retains its precision up to an
almost vertical inclination.
By pressing the top right button you can set a
reference bearing. A dot will appear to indicate
the set bearing. Additional symbols will appear
as well: squares at 90 degrees, triangles at 120
degrees and two parallel lines at 180 degrees,
as an aid in navigation for square, triangular
and reciprocal courses. The number in the
middle of the rose, which in absence of a set
bearing represents the bearing straight ahead,
now represents the deviation between the set
bearing and the direction straight ahead. If
you press the top right button again, the new
bearing will override the one in memory. If you
press and hold the top right button you erase
the bearing.
By pressing and holding the bottom right
button you activate the stop watch. This can
be helpful when timing yourself on the leg of
a navigation course. Every time you press and
hold the bottom right button, the stop watch
restarts from 00:00. If you exit the compass the
stop watch keeps running in the background.
The compass mode has no time-out. It stays
on the screen until you push the top left
button. This leads you back to the default
computer display.
NOTE
If an alarm is triggered while in compass
mode, Matrix automatically reverts to the
default display for better visualization of
the alarm message itself.
14


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