Operating Instructions
Page 36
Doc. 15301-RevB (2023-11-24)
8.4. Deco Planner
Introduction
• Calculates decompression profiles for simple
dives�
• Calculates gas consumption based on RMV
The Terns deco planner is best suited to
decompression diving� For no-decompression diving,
use the quick NDL Planner described on the previous
page�
Setup
The planner uses the current gases programmed
into the Tern in the current dive mode, as well as the
current GF low/high settings�
When used on the surface
Enter the expected surface
interval, bottom depth, bottom
time, respiratory minute
volume (RMV)�
Note: Residual tissue loading
(and CNS%) from recent dives
will be used in calculating the
profile
When the correct values are
entered, select “Run Plan”
and confirm decompression
settings and starting CNS�
8.3. Test Alerts
The Test Alerts pop-up provides a quick way to ensure
your alerts are working and that you are able to feel
them through your exposure suit�
Use the up and down arrows to select an alert and
press select to test it�
The Test Alerts pop-up should be used regularly if you
use vibration notifications�
Note, this feature only tests the different alerts that
may occur during a dive� Which alert activates in each
Warning, Info, or Error situation is not customizable
with the exception of Freediving Alerts (page 34)�
ft
125
.
6
23
19
:
DECO
20 214
T1O2/He
21/00
ft
TTS
VIB. = ON
2 Long
ALERTS
2 Long
Negative
Positive
Click
2 Short
1 Short
Alert
1 Long
3 Short
3 Long
Caution
Although vibration alerts are very useful,
never rely on them for your safety�
Electromechanical devices can and will
eventually fail�
Always be proactively aware of your depth,
no-decompression limit, gas supply, and
other critical dive data� You are ultimately
responsible for your own safety�
DECO
RUN PLAN
45
30
Starts in
now
14
Depth
m
min
Back
RMV
1.3
SP
Ready to Plan
DECO
GF:
Last Stop:
Start CNS:
40/85
3m
0%
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