Shearwater TERN - Page 30

Operating Instructions
Page 30
Doc. 15301-RevB (2023-11-24)
3 GasNx mode Example (cont.)
6� Max depth - Once NDL hits 0, deco stops will be
needed� Stop requirements display in place of the
NDL� TTS has increased to include deco stop time�
7� Ascent - It is safe to ascend to 12 meters� 1 minute
must be spent at that deco stop� While ascending,
the bar graph to the right of the depth shows the
ascent rate (10 mpm)� All decompression predictions
are made assuming an ascent rate of 10 meters per
minute�
8� Gas Change - All decompression predictions are
made assuming you will switch to the best available
gas on ascent� At 21m, the breathing gas turns yellow
indicating that a better breathing gas is available� In
this case 50%� If the switch is not made, deco stop
and time information will be inaccurate�
9� Missed Deco Stop - If you ascend shallower than
the decompression ceiling the Deco information will
flash red� If you fail to descend, a missed deco stop
warning will be triggered� Acknowledge and clear the
warning by pressing any button� Re-descend deeper
than the stop depth to clear the flashing text�
10� Deco Clear - Once all decompression obligation
has been cleared, the safety stop will begin counting
down�
End of example�
m
3
.
1
O2
99
%
DECO
PPO2
1.29
39
09
:
Lorem ipsum
TTS
2
SAFETY
1:43
m
39
.
7
O2
21
%
DECO
11
6
1
m
min
PPO2
1.03
12
58
:
TTS
!
m
31
.
1
O2
21
%
DECO
16
12
1
m
min
PPO2
.86
22
35
:
TTS
10
!
DECO
6� Max Depth 7� Ascent
m
21
.
2
O2
21
%
DECO
14
12
1
DECO
m
min
PPO2
.65
24
27
:
TTS
!
m
7
.
4
O2/He
50/00
DECO
14
9
2
DECO
m
min
PPO2
.86
27
44
:
TTS
!
C
L
E
A
R
WARNING
Missed Deco Stop
8� Gas Change 9�Missed Deco
Stop
10�Deco Clear