SUUNTO VYTEC - Manual (Page 24)

22
3.2.2. Mandatory Safety Stop
When the ascent rate exceeds 12 meters/min
[40 ft] momentarily or 10 meters/min [33ft]
continuously the micro-bubble build-up is pre-
dicted to be more than allowed for in the de-
compression model. The Suunto RGBM cal-
culation model responds to this by adding a
Mandatory Safety Stop to the dive. The time
of this Mandatory Safety Stop will depend on
the severity of the ascent rate excess.
The STOP sign will appear in the display and
when you reach the depth zone between 6 m to
3 m [20 ft to 10] also the CEILING label, ceiling
depth and the calculated Safety Stop time ap-
pear in the display. You should wait until the
Mandatory Safety Stop warning disappears
(Fig. 3.14.).
The Mandatory Safety Stop time always in-
cludes the three minute Recommended Safe-
ty Stop time. The total length of the Mandato-
ry Safety Stop time depends on the serious-
ness of the ascent rate violation.
You must not ascend shallower than 3 m [10
ft] with the Mandatory Safety Stop warning on.
If you ascend above the Mandatory Safety
Stop ceiling, a downward pointing arrow will
appear and a continuous beeping starts (Fig.
3.15.). You should immediately descend to, or
below, the Mandatory Safety Stop ceiling
depth. If you correct this situation at any time
during that dive, there are no affects on the
decompression calculations for future dives.
If you continue to violate the Mandatory
Safety Stop, the tissue calculation model is
affected and the dive computer shortens the
available no-decompression time for your
TIME DIVE
m
NO DEC TIME
T
C
B
MAX
bar
Fig. 3.7. Dive has just
begun and no air time is
shown. First estimate of
remaining air time will be
shown after 30-60 seconds.
Fig. 3.8. Diving display.
Present depth is 19.3 m
[63 ft] and no-decompres-
sion stop time limit is 23
minutes in A0/P1 mode.
Maximum depth during this
dive was 19.8 m [65 ft],
elapsed dive time is 16
minutes.
m
NO DEC TIME
T
C
B
MAX
DIVE TIME
MAX
bar
AIR TIME
Fig. 3.9. Diving display. Present cylinder pressure is 210
bar [3045 psi] and remaining air time 41 minutes.
Alternative display of current time and temperature is
shown for 5 seconds after pressing TIME button.
m
NO DEC TIME
T
C
B
MAX
DIVE TIME
MAX
bar
AIR TIME
TIME °C