Dacor DARWIN - Ascent Rate and Safety Stop

12
FIG. 12
When the no decompression time remaining is 1
min, an audible alarm is sounded to indicate that
the diver is about to exceed the no decompression
limits.
DIVE - "DECOMPRESSION STOP" DIVE
If the diver does not ascend when the above alarm
is sounded, the DARWIN will start calculating a
"decompression stop" dive, indicated by the
appearance of the "deco" message and an audible
alarm.
The dive parameters are displayed in the WIN1 and
WIN2 layouts as follows:
WIN1 shows the following information (fig. 13):
 Sea/fresh.
 "Deco" icon.
 Current depth (in "m" or "ft").
 Duration of the dive expressed in minutes.
 Depth of deepest decompression stop.
 Duration of the decompression stop in
question.
FIG. 13
Pressing the <Mode> button switches over, for
approximately 8 seconds, to the WIN2 layout
which shows (fig. 14):
 Salt/fresh.
 "Deco" icon.
 Maximum depth reached (in "m" or "ft").
 Measured temperature (in °C or °F).
 Ascent time, i.e. the total time necessary for
surfacing.
FIG. 14
After the 8 seconds have elapsed, or when the
<Mode> button is pressed, the display
automatically reverts to the WIN1 layout.
The ascent time is given by the sum of:
 the durations of the various decompression
stops (excluding the Safety Stop time, which is
always recommended).
 the time required to ascend at an average
speed of 15m/min (49ft/min).
The DARWIN will also check that the decompression
stops are performed correctly; two icons (fig. 15),
graphically indicate what action the diver should
take:
 2 triangles: correct decompression stop depth;
 upward triangle: diver below decompression
stop depth, ascend;
 downward triangle: diver has ascended above
decompression stop depth, descend!!
FIG. 15
If the diver overshoots the decompression stop
depth by more than 30 cm (11.8 in), the
"downward triangle" icon starts blinking; if the
overshoot exceeds 1 m (3.28 ft), an audible alarm
is sounded in addition to the blinking icon. These
!
WARNING
Never ascend above the correct
decompression stop depth.
Darwin.qxd 29/03/2002 16.45 Pagina 12