Page 31
Doc. 13301-Tec-RevB (2022-05-25)
Technical Modes
Operating Instructions
7. Max Depth
- We now have a decompression
requirement� Our first stop is at 12 meters and we will
need to remain there for up to one minute� Although
stops are shown in minutes, the computer will
calculate and change the ceiling in real time and the
stop may be less than a minute�
Time to surface (TTS) now indicates it will take
26 minutes to ascend to the surface following the
currently calculated decompression schedule�
8. Ascent
- As we ascend, the ascent rate indicator
shows two chevrons, or about 6 mpm / 20 fpm� This is
slower than the 10 mpm / 33 fpm that decompression
calculations assume� As a result of this slow ascent,
early decompression stops may clear before we arrive�
9. Missed Stop
- When we go shallower than our 6
meter stop, the deco stop information starts to flash
red� Significant stop violations will result in a missed
deco stop notification�
10. Deco Clear
- When we clear the last stop, the stop
depth and time is replaced by the Deco clear counter
that begins counting up from zero� We also see an
NDL of 99 minutes again� Once we surface, the depth
will return to 0 and a minute later when the computer
comes out of dive mode, the NDL goes to 0 as well�
7� Max Depth
8� Ascent
9� Missed Stop
10� Deco Clear
TTS
OC 21/00
O2/HE
NDL
PPO2
DEPTH
TIME
CLEAR
3.0
.27
61
0
99
2:14
TIME
TTS
OC 21/00
O2/HE
NDL
PPO2
DEPTH
TIME STOP
5.8
.33
44
14
0
6 1
TIME
TTS
OC 21/00
O2/HE
NDL
PPO2
DEPTH
TIME STOP
16.4
.55
33
24
0
9 4
TIME
TTS
OC 21/00
O2/HE
NDL
PPO2
DEPTH
TIME STOP
29.6
.83
30
26
0
12 1
No safety stop countdown in technical dive
modes
It is widely believed that additional time spent at the
last decompression stop reduces the overall risk of
decompression sickness�
The decision not to include a safety stop countdown
in technical dive modes is an acknowledgment that
technical divers plan decompression ahead of their
dives to manage decompression risk with this in
mind�
The deco clear counter is a useful tool to aid divers in
padding their final decompression stop for additional
conservatism�