Shearwater TERN - Page 44

Operating Instructions
Page 44
Doc. 15301-RevB (2023-11-24)
Edit Gases
The Edit Gases function allows
you to set up 3 gases When in
3GasNX mode�
You must be in 3 GasNX mode
to edit gases for that mode�
For each gas, you can turn the
gas on and off and select the
percentage of oxygen in the
gas� The remainder is assumed
to be nitrogen�
Scroll through the gas list using
the arrow keys and select the
gas you wish to edit� The gas
contents are edited one digit at
a time� The yellow box shows
the digit being edited�
The Edit Gases menu is available both at the surface
and while on a dive� Note that changing the gases
you have turned on during a dive will impact
decompression schedule and TTS�
Note: The “Act” denotes the active gas. You cannot
delete the active gas. If you try, it will generate an
error. You can edit it, but cannot set the O2 to 00%.
Edit Gas
The Edit Gas menu is only available when in Nitrox
mode and allows you to set your breathing gas� This
menu is available at the surface and while on a dive�
Note that changing your breathing gas mid-dive
will only affect tissue loading moving forward� If the
computer was programmed with a more oxygen
rich mix than you were actually breathing, the NDL
and any other decompression information will be
inaccurate� If you don’t have a secondary computer,
you should follow your training to end the dive safely
and monitor for signs of decompression sickness�
m
30
.
4
O2/He
10/50
DECO
30
2
m
min
42
33
:
98
1.3
TTS
Edit Gases
Dive Tools
Alerts
OFF
Edit Gases
50%
99%
21%
ACT
ON
Back
00
0m
0:
Change Freedive (FD) Set
Use this menu item to change between freedive sets�
OC
BO
CC
FD
Turn off gases you are not carrying
The decompression algorithm assumes that the
diver is carrying and plans to use every gas that
is currently turned on� Leaving gases that are
not expected to be used turned on will result
in inaccurate time to surface, decompression
stop and decompression time information being
displayed�
OC
3Nx
Nx
m
0
.
0
O2/He
10/50
DECO
30
2
m
min
98
1.3
TTS
SURFACE
mh
1314
Watch
Change FD Set
Edit FD Set
m
0
.
0
O2/He
10/50
DECO
30
2
m
min
98
1.3
TTS
SURFACE
mh
1314
1:Deep
Change FD Set
2:Pool
3:Rep.
✘