Page 58
Doc. 13301-Tec-RevB (2022-05-25)
Technical Modes
Operating Instructions
Deco Planner
Introduction
• Calculates decompression
profiles for simple dives�
• Calculates gas
consumption based on
RMV
• Can be used both on the
surface and during a dive�
The Perdix 2 also contains a separate quick NDL
Planner that can be found in the Dive Setup menu
of recreational modes� See the Perdix 2 Recreational
Modes Manual for details�
Setup
The planner uses the current gases programmed
in the current dive mode, as well as the current
conservatism (GF low/high) settings� VPM-B dive
planning is available on units with the optional VPM-B
unlock�
When used at the Surface
Enter the dive bottom depth, bottom time, respiratory
minute volume (RMV) and PPO2 (closed-circuit only)�
Note: Residual tissue loading (and CNS%) from recent
dives will be used in calculating the profile
When the correct values are entered, confirm
decompression settings and starting CNS, then select
“Plan”�
Deco Planner
DEPTH
Plan
Next
TIME
0.0
.21
PPO2
SURFACE
2
h
45
m
Deco Planner Menu
Change
Next
Enter Bottom Time
OC
in minutes
Min: 5
Max:180
Depth Time RMV
040
15
020
Exit
Plan
Ready to Plan Dive
OC
GF: 30/70
Last Stop: 3m
Start CNS: 0%
Depth Time RMV
040
15
020
Enter dive details
Press Plan when ready
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)�
Deco Planner Limitations
The Perdix 2’s 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 Perdix 2’s 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 72�