Operating Instructions
Page 37
Doc. 15301-RevB (2023-11-24)
Results Screens
The results are given in tables showing:
Stp Stop Depth In meters (or feet)
Tme Stop Time In minutes
Run Run Time In minutes
Gas Gas Used %O2
The first few rows will show the bottom time (bot)
and the ascent legs (asc) to ascend to the first stop�
Multiple ascent legs may be shown if gas switches are
needed
If more than 2 stops are needed, the results will be
split onto several screens� Scroll down to step through
the screens�
When used during a dive
Computes the decompression profile assuming the
ascent will begin immediately� There are no settings to
enter� (RMV is last used value)
Limitations
The Tern Deco Planner is intended for simple dives�
Multi-level dives are not supported�
The Deco Planner does not provide thorough
validation of the profile� For example, it does not
check for nitrogen narcosis limitations, gas usage
limitations, or CNS percentage violations�
The user is responsible for ensuring a safe profile is
followed�
Important!
The Terns Deco Planner makes the following
assumptions:
• Descent rate is 18m/min (60ft/min) and
the ascent rate is 10m/min (33ft/min)�
• The gas in use at any time will be the gas
with the highest PPO2 within the PPO2
limits�
• The planner will use the configured last
stop depth�
• The RMV is the same during the bottom
phase of the dive as it is while traveling
and during deco
Read more about PPO2 Limits on
page 52�
DECO
OC
bot 20
40 21%
asc 22
21 21%
asc 23
12 50%
1 24
12 50%
Stp Tme
GasRun
DECO
OC
1 25
9 50%
2 27
6 99%
4 31
3 99%
Stp Tme
GasRun
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