Ascent Rate - SCUBAPRO UWATEC Galileo Luna Manual Del Usuario

that do require immediate action by the
diver. There are six different alarms:
1. Ascent rate alarm
2. Exceeding a safe ppO
3. CNS O =100%
2
4. Missed decompression stop
5. RBT = 0 minutes
6. Low battery during the dive
! WarninG
When in gauge mode, all warnings and all
alarms are off aside for the low battery
alarm.
F
NOTE:
- Alarms are both visual and audible,
as described in detail below.
- If you are in COMPASS mode
when an alarm is triggered, Galileo
will revert to the regular computer
display (CLASSIC,
FULL) in order to properly display
the message related to the alarm.
- Ascent rate alarm has priority over
other alarms if they are triggered
simultaneously.
- If warnings are activated while
alarms are showing, the former will
show only after the alarms have
expired and only if they are still
applicable at that time.

3.2.1 Ascent rate

As you ascend during a dive, the pressure
surrounding you diminishes. If you ascend
too quickly, the ensuing pressure reduction
could lead to microbubble formation. If you
ascend too slowly, the continued exposure
to high ambient pressure means that you
will continue loading some or all of your
tissues with nitrogen. Consequently, there
is an ideal ascent rate that is slow enough
to minimize microbubble formation yet fast
enough to minimize the effect of continued
loading on your tissues.
The pressure reduction that the body can
tolerate without significant microbubble
formation is higher at depth than it is in
the shallows: the key factor is not the
pressure drop by itself, but rather the ratio
of the pressure drop relative to the ambient
pressure. This means that the ideal ascent
rate at depth is higher than it is in the
/MOD shallows.
2
Along these lines, Galileo employs a variable
ideal ascent rate: its value ranges between
7 and 20m/min and the actual breakdown
by depth range is listed in the table below.
depth
(m)
speed
(m/min)
depth
(ft)
speed
(ft/min)
During an ascent, the nitrogen loading bar
graph is replaced by a graphical ascent
rate indication. The full height of the bar
graph represents twice the ideal ascent
rate, so that when you are ascending at
LIGHT or
the ideal ascent rate half of the bar graph
is lit. If more than half of the bar is lit you
are ascending too fast. In addition, for
cLaSSic and fuLL only, Galileo displays
the ascent rate numerically in place of the
temperature.
If the ascent rate is greater than 110% of
the ideal value the message aScent too
faSt! appears.
The following pictures show how the ascent
rate alarm message and the ascent rate
value are displayed for the various screen
configurations.
3. diving with Galileo
<6 <12 <18 <23 <27 <31
<35 <39 <44 <50 >50
7 8 9 10
15 17 18 19
<20 <40 <60 <75 <88 <101
<115 <128 <144 <164 >164
23 26 29 33
49 56 59 62
11 13
20
36 43
66
41